CN112867042B - Gain control method, device, base station and storage medium - Google Patents

Abstract

The application relates to a gain control method, a gain control device, a base station and a storage medium, wherein the base station determines the current working mode of a downlink channel; then, determining a target adjustment threshold value matched with the current working mode; further, the base station detects the current working temperature of the downlink channel in the current working environment, and determines the gain adjustment amount of the downlink channel in the current working environment according to the current working temperature; adjusting the gain of the downlink channel based on the gain adjustment amount when the gain adjustment amount is less than the target adjustment threshold; wherein the current operating mode is determined by the power range of the signal input to the downstream channel. By adopting the method, the phenomenon that the power amplifier tube is burnt out due to the fact that the base station adopts a larger gain adjustment amount to adjust the downlink channel gain in a high-power working mode can be avoided, and the phenomenon that the base station fails to perform gain adjustment due to the fact that the target adjustment threshold value is smaller in a low-power working mode is avoided, so that the working stability and reliability of the base station are improved.

Description

Gain control method, device, base station and storage medium

technical field

The present application relates to the technical field of communications, and in particular to a gain control method, device, base station and storage medium.

Background technique

In order to meet the coverage capability and service quality requirements of the base station, the communication system usually sets certain requirements on the maximum transmit power of the base station. Generally, the transmit power of the base station is required to be stable within ±2dB of the rated transmit power. In the actual working process, the transmit power of the base station will be affected by factors such as device performance and ambient temperature, and there will be deviations. Therefore, it is necessary to control the loop gain of the base station to ensure the accuracy and stability of the transmit power.

In the traditional method, the base station can adjust the gain of the downlink channel according to the loop gain at the initial calibration, the loop gain at the current operating temperature, and the temperature compensation table, so that the output power of the downlink channel can be stabilized within a preset range ; Further, the base station can compare the output power of the downlink channel with a preset power threshold, and output downlink channel overpower warning information when the output power is greater than the preset power threshold.

However, if the above-mentioned power threshold is set unreasonably, the use of the above-mentioned gain control method may easily cause the power amplifier of the downlink channel to burn out or cause a false alarm of overpower.

Contents of the invention

Based on this, it is necessary to provide a gain control method, device, base station and storage medium for the above technical problem.

A gain control method, the method comprising:

Determine the current working mode of the downlink channel; the current working mode is determined by the power range of the signal input to the downlink channel;

Determining a target adjustment threshold that matches the current operating mode;

Detect the current working temperature of the downlink channel, and determine the gain adjustment amount of the downlink channel at the current working temperature according to the current working temperature;

If the gain adjustment amount is smaller than the target adjustment threshold, the gain of the downlink channel is adjusted based on the gain adjustment amount.

In one of the embodiments, the above method also includes:

When the gain adjustment amount is greater than or equal to the target adjustment threshold, a gain control abnormality alarm is output.

In one of the embodiments, the above-mentioned determination of the current working mode of the downlink channel includes:

Perform power detection on the baseband signal output by the baseband unit corresponding to the downlink channel under the current environment to obtain the current forward power;

The current working mode of the downlink channel is determined according to the difference between the preset rated forward power and the current forward power.

In one of the embodiments, the above-mentioned working mode is a high-power working mode or a low-power working mode, and the current working mode of the downlink channel is determined according to the difference between the preset rated forward power and the current forward power, including:

If the difference between the current forward power and the rated input power is less than or equal to the preset first difference threshold, it is determined that the current working mode is a high-power working mode;

If the difference between the current forward power and the rated input power is greater than the preset first difference threshold, it is determined that the current working mode is the low power working mode.

In one of the embodiments, the determination of the target adjustment threshold matching the current working mode includes:

According to the preset correspondence between the adjustment threshold and the working mode, determine the target adjustment threshold corresponding to the current working mode; the corresponding relationship includes the corresponding adjustment threshold in each working mode.

In one of the embodiments, the determination of the gain adjustment amount of the downlink channel at the current operating temperature according to the current operating temperature includes:

Perform temperature compensation on the downlink channel according to the current working temperature and the preset temperature compensation table of the downlink channel; the temperature compensation table includes the temperature compensation amount corresponding to each working temperature, and the temperature compensation amount is the gain difference between the working temperature and the reference temperature;

After temperature compensation is performed on the downlink channel, the current loop gain of the downlink channel is obtained; the current loop gain is the difference between the feedback power obtained through the feedback channel at the current operating temperature and the current forward power; The output power of the channel is coupled to obtain;

Based on the first difference between the current loop gain and the initial loop gain, determine the gain adjustment amount at the current operating temperature; the initial loop gain is the loop gain of the downlink channel during initial calibration.

In one of the embodiments, the determination of the gain adjustment amount at the current operating temperature based on the first difference between the current loop gain and the initial loop gain includes:

Obtain the initial feedback gain compensation amount of the feedback channel at the initial calibration temperature and the current feedback gain compensation amount at the current working temperature according to the preset temperature compensation table of the feedback channel;

Calculate the second difference between the current feedback gain compensation amount and the initial feedback gain compensation amount;

The sum of the first difference and the second difference is determined as the gain adjustment amount.

In one of the embodiments, the temperature compensation of the downlink channel is carried out according to the current working temperature and the preset temperature compensation table of the downlink channel, including:

Obtain the initial gain compensation amount of the downlink channel at the initial calibration temperature and the current gain compensation amount at the current working temperature according to the preset temperature compensation table of the downlink channel;

Calculate the third difference between the current gain compensation amount and the initial gain compensation amount;

According to the third difference, the attenuation amount of the attenuator corresponding to the downlink channel is adjusted.

In one of the embodiments, the above-mentioned adjustment of the gain of the downlink channel based on the gain adjustment amount includes:

According to the gain adjustment amount, adjust the attenuation amount of the attenuator corresponding to the downlink channel.

In one of the embodiments, a digital pre-distortion DPD module is included between the baseband unit and the downlink channel to detect the current working temperature of the downlink channel under the current working environment, and determine the gain of the downlink channel under the current working temperature according to the current working temperature Before adjusting the amount, also include:

Detect the input power of the DPD module and the output power of the DPD module;

Calculate the fourth difference between the output power of the DPD module and the input power of the DPD module;

If the fourth difference is less than or equal to the preset second difference threshold, continue to detect the current working temperature of the downlink channel under the current working environment, and determine the gain adjustment amount of the downlink channel under the current working temperature according to the current working temperature A step of.

In one of the embodiments, the above method also includes:

If the fourth difference is greater than the preset second difference threshold, a DPD abnormal alarm is output.

A gain control device, said device comprising:

A determining module, configured to determine the current working mode of the downlink channel; the current working mode is determined by the power range of the signal input to the downlink channel;

A matching module, configured to determine a target adjustment threshold matching the current working mode;

A detection module, configured to detect the current working temperature of the downlink channel, and determine the gain adjustment amount of the downlink channel at the current working temperature according to the current working temperature;

An adjustment module, configured to adjust the gain of the downlink channel based on the gain adjustment amount when the gain adjustment amount is less than the target adjustment threshold.

A computer device, including a memory and a processor, the memory stores a computer program, and the processor implements the following steps when executing the computer program:

Determine the current working mode of the downlink channel; the current working mode is determined by the power range of the signal input to the downlink channel;

Determining a target adjustment threshold that matches the current operating mode;

Detect the current working temperature of the downlink channel, and determine the gain adjustment amount of the downlink channel at the current working temperature according to the current working temperature;

If the gain adjustment amount is smaller than the target adjustment threshold, the gain of the downlink channel is adjusted based on the gain adjustment amount.

A computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the following steps are implemented:

Determine the current working mode of the downlink channel; the current working mode is determined by the power range of the signal input to the downlink channel;

Determining a target adjustment threshold that matches the current operating mode;

Detect the current working temperature of the downlink channel, and determine the gain adjustment amount of the downlink channel at the current working temperature according to the current working temperature;

If the gain adjustment amount is smaller than the target adjustment threshold, the gain of the downlink channel is adjusted based on the gain adjustment amount.

In the above gain control method, device, base station and storage medium, the base station determines the current working mode of the downlink channel; then, determines the target adjustment threshold matching the current working mode; further, the base station detects the current working temperature of the downlink channel under the current working environment , and determine the gain adjustment amount of the downlink channel at the current operating temperature according to the current operating temperature; when the gain adjustment amount is less than the target adjustment threshold, adjust the gain of the downlink channel based on the gain adjustment amount; where the current working mode is determined by the input The power range of the signal to the downlink channel is determined. Since the base station has determined the current working mode of the downlink channel, different target adjustment thresholds can be set for different current working modes; further, when the base station adjusts the gain of the downlink channel at the current working temperature, the gain of the downlink channel can be set to The adjustment amount is compared with the target adjustment threshold, so that the base station adjusts the gain of the downlink channel based on the gain adjustment amount when the gain adjustment amount is less than the target adjustment threshold; it can prevent the base station from adopting a large gain adjustment in the high-power working mode Adjusting the gain of the downlink channel by a large amount will cause the power amplifier tube of the downlink channel to burn out, which improves the working stability and reliability of the base station; A large gain adjustment amount adjusts the gain of the downlink channel, avoiding false alarms due to gain adjustment failure caused by a small target adjustment threshold, and further improving the working stability and reliability of the base station.

Description of drawings

Fig. 1 is an application environment diagram of the gain control method in an embodiment;

Fig. 2 is a schematic flow chart of a gain control method in an embodiment;

FIG. 3 is a schematic flow chart of a gain control method in an embodiment;

FIG. 4 is a schematic flow chart of a gain control method in another embodiment;

FIG. 5 is a schematic flow chart of a gain control method in another embodiment;

FIG. 6 is a schematic flow chart of a gain control method in another embodiment;

Fig. 7 is a structural block diagram of a gain control device in an embodiment;

FIG. 8 is a structural block diagram of a gain control device in another embodiment;

Fig. 9 is a structural block diagram of a gain control device in another embodiment;

Fig. 10 is a structural block diagram of a gain control device in another embodiment;

Fig. 11 is a structural block diagram of a gain control device in another embodiment;

Fig. 12 is an internal structure diagram of a base station in an embodiment.

Detailed ways

In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

The gain control method that the present application provides can be applied in the base station shown in Figure 1, and above-mentioned base station can comprise processor 101 and the base band unit 102 that is connected with processor 101, Field Programmable Gate Array (Field Programmable Gate Array, FPGA for short) ) module 103 and downlink channel 104, the above-mentioned baseband unit 102 can output the baseband signal to the FPGA module 103; after the above-mentioned FPGA module 103 can process the baseband signal, send it to the downlink channel 104; the above-mentioned downlink channel 104 can send the FPGA module 103 After the signal is converted into a radio frequency signal, the radio frequency signal is amplified. The foregoing base station may further include a temperature detector 105, a feedback channel 106, and the like. Above-mentioned processor 101 can realize gain control method by program software, for example processor can be ARM (Advanced RISC Machines) processor, install OAM (Operation Administration and Maintenance) program software in ARM processor, realize to FPGA module 103 by OAM , the control of the downlink channel 104, the temperature detector 105, and the feedback channel 106. The above-mentioned base station 100 may be, but not limited to, base station equipment of types such as macro base stations, micro base stations, and pico base stations, and may be Global System of Mobile communication (GSM for short) or Code Division Multiple Access (CDMA for short). The base station can also be a base station (NodeB, NB for short) in Wideband Code Division Multiple Access (WCDMA for short), or an evolved base station (EvolutionalNode B, eNB or eNodeB for short) in LTE, or a relay station Or an access point, or a base station in a 5G network, a Customer Premise Equipment (CPE for short), etc., are not limited here.

In one embodiment, as shown in FIG. 2 , a gain control method is provided. The method is applied to the base station in FIG. 1 as an example for illustration, including:

S101. Determine a current working mode of a downlink channel; the current working mode is determined by a power range of a signal input to the downlink channel.

Wherein, the base station equipment may include a baseband unit, an FPGA module, and at least one downlink channel. The above-mentioned baseband unit can output baseband signals, and the above-mentioned FPGA module can process the baseband signals and output them to the downlink channel. The above-mentioned downlink channel can convert the received signal into a radio frequency signal, and then amplify the radio frequency signal and output it to the antenna unit. The above-mentioned FPGA modules may include but are not limited to Digital Up Converter (Digital Up Conversion, DUC for short) module, Crest Factor Reduction (CFR for short) module, Digital Pre-Distortion (Digital Pre-Distortion, DPD for short) module and digital gain The adjustment module is used to process the baseband signal to form a digital signal, adjust the gain of the digital signal, and then output it to the downlink channel.

The power range of the signal input to the downlink channel may be the power range of the baseband signal output by the baseband unit, or the power range of the downlink signal output by the FPGA module, which is not limited here.

The above-mentioned downlink channel can work in multiple working modes, which can be high-power mode and low-power mode; it can also be high-power mode, medium-power mode and low-power mode; it can also be high-power mode, medium-power mode, and low-power mode , silent working mode, etc., the number of working modes and the way of division are not limited here.

When the base station determines the current working mode of the downlink channel, it can be determined by detecting the power value of the signal input to the downlink channel, or by querying the indication information of the current working mode. For example, the baseband unit can send the working mode information to the downlink channel. Indication information, "1" in the above indication information may indicate that the downlink channel is working in a high-power mode, and "0" may indicate that the downlink channel is working in a low-power mode; the determination method of the above-mentioned current working mode is not limited here.

S102. Determine a target adjustment threshold matching the current working mode.

The above-mentioned target adjustment threshold is related to the power control precision of the downlink channel. If the output power of the downlink channel in one of the working modes is relatively high, the power control accuracy of the base station is required to be high, and the power needs to be controlled within a range with a small difference from the rated output power to avoid the downlink channel from outputting When the power is high, adding a large gain will cause the power amplifier to burn out; in one of the working modes, when the output power of the downlink channel is small, the power control accuracy requirements for the base station are low, and the base station can control the output power of the downlink channel at the same as the rated output power. In a range with a large difference, the output power of the downlink channel can be quickly adjusted to the corresponding power range, improving power control efficiency, and avoiding false alarms caused by power control failure. For example, if the base station works in high power mode, that is, when the output power is relatively large, such as 49dBm, the base station can control the power of the downlink channel within the range of 50dBm±2dB; if it works in low power mode, that is, the output power is relatively small, such as 20dBm , the base station can control the power of the downlink channel within the range of 20dBm±5dB. Based on the different power control precisions in different working modes, the base station can determine different target adjustment thresholds according to different working modes, so that the gain control can be performed using the adjustment threshold matching the working mode.

Specifically, multiple adjustment thresholds may be preset in the base station, and the adjustment thresholds may correspond to working modes. Optionally, the base station can preset the corresponding relationship between the adjustment threshold and the working mode. The above-mentioned corresponding relationship can be preset by the staff and stored in the base station. The above-mentioned corresponding relationship can include the corresponding adjustment threshold in each working mode; the base station can According to the preset corresponding relationship between the adjustment threshold and the working mode, the target adjustment threshold corresponding to the current working mode is determined.

S103. Detect the current working temperature of the downlink channel, and determine the gain adjustment amount of the downlink channel at the current working temperature according to the current working temperature.

Further, the base station can detect the current working temperature of the downlink channel. The base station may include a temperature sensor, and the temperature sensor may be set at the position of the downlink channel or near the power amplifier in the downlink channel; when the base station includes multiple downlink channels, a temperature sensor may be configured for each downlink channel , used to detect the current operating temperature corresponding to the downlink channel, or the base station may also configure a temperature sensor for multiple downlink channels, which is not limited here. The base station can obtain the temperature collection signal collected by the temperature sensor through the processor, and then process the temperature collection signal to obtain the current working temperature.

After obtaining the current working temperature of the downlink channel, the base station can determine the gain adjustment amount of the downlink channel at the current working temperature according to the current working temperature. When the base station equipment is initially used, the gain of the downlink channel can be determined through initial calibration; when the current operating temperature is different from the operating temperature at the time of initial calibration, the gain of the downlink channel will change with the temperature change. In order to stabilize the output power of the downlink channel, it is necessary to adjust the gain of the downlink channel.

The memory in the base station may pre-store the gain temperature compensation table of the downlink channel, and the gain temperature compensation table may include the gain difference of each operating temperature relative to the reference temperature. For example, the gain temperature compensation table may be based on 25°C. If the initial calibration temperature is 45°C, the current working temperature is 60°C. Then the current temperature compensation value is the gain difference of 60°C minus the gain difference of 45°C.

The base station may determine the gain adjustment amount of the downlink channel at the current operating temperature according to the gain difference corresponding to the current operating temperature and the operating temperature at the time of initial calibration.

S104. If the gain adjustment amount is less than the target adjustment threshold, adjust the gain of the downlink channel based on the gain adjustment amount.

The base station can compare the gain adjustment amount corresponding to the current operating temperature with the target adjustment threshold. If the gain adjustment amount is less than the target adjustment threshold, the gain of the downlink channel can be adjusted based on the gain adjustment amount, so that the gain of the downlink channel is stable at a certain value. within range. In a case where the gain adjustment amount is greater than or equal to the target adjustment threshold, the base station may output a gain control abnormal alarm. If the gain adjustment amount is greater than or equal to the target adjustment threshold, the base station can consider that the current large gain adjustment amount may be caused by an abnormally large input signal, and the base station uses a large gain adjustment amount to adjust the gain of the downlink channel, which may cause the power amplifier to burn out. To ensure the safe operation of the power amplifier tube, it can output a gain control abnormal alarm, and close the downlink channel and/or close the baseband unit.

When adjusting the gain of the downlink channel, the base station may adjust the gain of the downlink channel, or may adjust the loop gain of the downlink channel. The gain of the above-mentioned downlink channel may be the difference between the output power of the downlink channel and the input power of the downlink channel, and the loop gain of the above-mentioned downlink channel may be between the feedback power obtained through the feedback channel and the forward power output by the baseband unit The difference; the above feedback power is obtained by coupling the output power of the downlink channel. The above-mentioned feedback channel may include a coupler, an attenuator and an analog-to-digital conversion circuit. The above-mentioned coupler can be used to couple the radio frequency signal output by the downlink channel, and then attenuate the coupled radio frequency signal to obtain a digital signal through analog-to-digital conversion. FPGA can The digital signal output by the feedback channel is processed to obtain the feedback power.

When the base station adjusts the gain of the downlink channel based on the gain adjustment amount, it can adjust the attenuation amount of the analog attenuator in the downlink channel, or adjust the attenuation amount of the digital attenuator set in the FPGA module, or adjust the above-mentioned analog attenuator at the same time and the attenuation of the digital attenuator are not limited here. The attenuation range and attenuation precision of the analog attenuator and the digital attenuator may be different, and the base station may determine which attenuation to adjust first according to the gain adjustment amount.

In the above gain control method, the base station determines the current working mode of the downlink channel; then, determines the target adjustment threshold matching the current working mode; further, the base station detects the current working temperature of the downlink channel under the current working environment, and determines the current working temperature according to the current working temperature The gain adjustment amount of the downlink channel at the current operating temperature; when the gain adjustment amount is less than the target adjustment threshold, the gain of the downlink channel is adjusted based on the gain adjustment amount; wherein, the current working mode is output by the baseband unit to the downlink channel. Determine the power range; the target adjustment threshold is related to the power control accuracy of the downlink channel. Since the base station has determined the current working mode of the downlink channel, different target adjustment thresholds can be set for different current working modes; further, when the base station adjusts the gain of the downlink channel at the current working temperature, the gain of the downlink channel can be set to The adjustment amount is compared with the target adjustment threshold, so that the base station adjusts the gain of the downlink channel based on the gain adjustment amount when the gain adjustment amount is less than the target adjustment threshold; it can prevent the base station from adopting a large gain adjustment in the high-power working mode Adjusting the gain of the downlink channel by a large amount will cause the power amplifier tube of the downlink channel to burn out, which improves the working stability and reliability of the base station; A large gain adjustment amount adjusts the gain of the downlink channel, avoiding false alarms due to gain adjustment failure caused by a small target adjustment threshold, and further improving the working stability and reliability of the base station.

FIG. 3 is a schematic flowchart of a gain control method in another embodiment. This embodiment relates to a method for the base station to determine the current working mode of the downlink channel. On the basis of the above embodiment, as shown in FIG. 3 , the above S101 includes:

S201. Under the current environment, perform power detection on the baseband signal output by the baseband unit corresponding to the downlink channel to obtain the current forward power.

When the base station determines the current working mode of the downlink channel, it can be determined according to the magnitude of the baseband signal output by the baseband unit in the current environment. Specifically, the base station may perform power detection on the baseband signal output by the baseband unit to obtain the current forward power. The base station can send a power query command to the baseband unit to obtain the current forward power returned by the baseband unit, or can perform power detection on the baseband signal output by the baseband unit through the FPGA module to obtain the above-mentioned current forward power. The above power detection may detect the average power, may also detect the peak power, and may also obtain a combination of the average power and the peak power, which is not limited here.

S202. Determine the current working mode of the downlink channel according to the difference between the preset rated forward power and the current forward power.

On the basis of obtaining the current forward power, the base station can compare the current forward power with the rated forward power, and then determine the current working mode of the downlink channel according to the difference between the rated forward power and the current forward power. The above-mentioned rated forward power may be a value preset and stored in the base station when the base station is calibrated, and the power value of the baseband signal output by the baseband unit when the downlink channel is rated output. The above difference may be the rated forward power minus the current forward power, or the current forward power minus the rated forward power, or the absolute value of the difference between the rated forward power and the current forward power. The base station may compare the above difference with a preset threshold condition, determine a threshold interval that the above difference satisfies, and then determine the working mode corresponding to the threshold interval as the current working mode. In a specific embodiment, if the difference between the current forward power and the rated forward power satisfies the first threshold condition, the target adjustment threshold can be determined to be the first threshold; if the difference between the current forward power and the rated forward power satisfies the first threshold For the second threshold condition, it may be determined that the target adjustment threshold is the second threshold.

In one scenario, the working mode of the downlink channel includes a high-power working mode and a low-power working mode, and the base station may, when the difference between the current forward power and the rated input power is less than or equal to the preset first difference threshold , determining that the current working mode is a high-power working mode; and determining that the current working mode is a low-power working mode when the difference between the current forward power and the rated input power is greater than a preset first difference threshold. Wherein, the above-mentioned first difference threshold may be a value pre-stored in the base station.

For example, the above-mentioned rated forward power can be 0dBm, the above-mentioned first difference threshold can be 6dBm, if the current forward power is -3dBm, then the absolute value of the difference between the above-mentioned current forward power and the rated input power is 3dBm, it can be determined The downlink channel works in a high-power working mode. If the current forward power is -20dBm, then the difference between the above-mentioned current forward power and the rated input power is 20dBm, and it can be determined that the downlink channel works in a low-power working mode.

In the above gain control method, the base station can obtain more accurate current forward power when the output of the baseband unit is abnormal by detecting the current forward power; further, the base station can obtain a more accurate current forward power according to the difference between the rated forward power and the current forward power, The current working mode of the downlink channel is determined, so that the current working mode of the downlink channel is more accurate, so that a more accurate target adjustment threshold can be used for gain adjustment, and the operation reliability of the base station is improved.

FIG. 4 is a schematic flowchart of a gain control method in another embodiment. This embodiment relates to a way for the base station to determine the gain adjustment amount at the current operating temperature. On the basis of the above embodiment, as shown in FIG. 4 , the above S103 include:

S301. Perform temperature compensation on the downlink channel according to the current working temperature and the preset temperature compensation table of the downlink channel; the temperature compensation table includes the temperature compensation amount corresponding to each working temperature, and the temperature compensation amount is the gain difference between the working temperature and the reference temperature value.

The memory in the base station may pre-store the gain temperature compensation table of the downlink channel, and the gain temperature compensation table may include the temperature compensation amount of the downlink channel at each working temperature relative to the reference temperature. For example, the reference temperature of the downlink channel can be 20 degrees Celsius, the gain of the downlink channel may be reduced by 0.3dB relative to the reference temperature when the working temperature is 25 degrees Celsius, and the gain compensation amount when the working temperature is 25 degrees Celsius can be set in the temperature compensation table as 0.3dB ;The gain of the downlink channel may be reduced by 1.5dB relative to the reference temperature when the working temperature is 50 degrees Celsius. The gain may increase by 2dB relative to the reference temperature, and the gain compensation amount at the working temperature of -40 degrees Celsius can be set to -2dB in the temperature compensation table. It should be noted that the sign of the gain compensation amount in the above temperature compensation table may also be negative at high temperature and positive at low temperature, which is not limited here.

Specifically, the base station obtains the initial gain compensation amount of the downlink channel at the initial calibration temperature and the current gain compensation amount at the current operating temperature according to the preset temperature compensation table of the downlink channel; then, calculates the current gain compensation amount and A third difference of the initial gain compensation amount; and adjusting the attenuation amount of the attenuator corresponding to the downlink channel according to the third difference.

In a specific implementation manner, the base station may adjust the analog attenuation value or the attenuation amount of the digital attenuator according to the third difference, so as to implement temperature compensation for the downlink channel. In order to ensure the accuracy of the temperature compensation of the downlink channel, the attenuation of each attenuator can be adjusted sequentially in combination with the adjustment accuracy of the analog attenuator and the digital attenuator. In the base station, the adjustment accuracy of the analog attenuator can be set as the first threshold, and the adjustment accuracy of the digital attenuator can be set as the second threshold; further, the base station can compare the third difference with the first threshold and the second threshold. If the third difference is less than the second threshold, it is confirmed that the gain of the downlink channel does not need to be adjusted, and the gain control is completed; if the third difference is greater than or equal to the second threshold and less than the first threshold, then the attenuation of the digital attenuator is performed Adjustment; if the third difference is greater than or equal to the first threshold, first adjust the attenuation of the analog attenuator according to the adjustment step until the remaining adjustment is less than the first threshold, and then continue to adjust the above-mentioned remaining adjustment through the digital attenuator. Wherein, the adjustment remaining amount is the difference between the third difference and the adjusted attenuation amount. The base station can record the adjustment times of the analog attenuator and the digital attenuator; if the adjustment times are greater than the preset times threshold, it is determined that the gain control fails.

For example, according to the current operating temperature reported by the temperature detector and the temperature compensation table of the downlink channel, the base station determines that the gain compensation amount corresponding to the current operating temperature of the downlink channel is A1, and the gain compensation amount corresponding to the initial calibration temperature stored in the memory is A0, calculate the third difference value ΔA=A1-A0, further, the base station may adjust the analog gain or digital gain of the downlink channel according to the third difference value ΔA. The adjustment accuracy of the analog attenuator may be 0.5dB, the adjustment accuracy of the digital attenuator may be 0.1dB, and the base station may set the first threshold to 0.5 and the second threshold to 0.1. Assuming that the current working temperature is 50 degrees Celsius and the initial calibration temperature is 25 degrees Celsius, the above-mentioned third difference ΔA may be 2.21 dB. First of all, ΔA>0.5, you can adjust the attenuation of the analog attenuator first, adjust the remaining amount 0.21 to less than 0.5 after adjusting 4 times, and further adjust the attenuation of the digital attenuator; adjust the digital attenuation twice according to the step of 0.1 After the attenuation amount of the attenuator, the gain control is done.

The above temperature compensation table can be obtained through high and low temperature tests, and then written into the memory of the base station. The staff can place the base station in a high and low temperature box, and pre-set a reference temperature of the incubator, such as 25 degrees Celsius, so that the base station is powered on and in a normal working state and remains stable. By adjusting the analog attenuator and digital attenuator, the output power of the downlink channel is the rated output power, read and record the working temperature of the downlink channel and the output power value of the downlink channel at this time. Further, keep the attenuation of the analog attenuator and the digital attenuator constant, adjust the temperature of the high and low temperature box according to the preset temperature interval (for example, 5 degrees Celsius) and keep it for a period of time, respectively read and record the temperature of the downlink channel at this time. Operating temperature and output power value of downlink channel. Finally, by sorting out the high and low temperature test data, the working temperature of the downlink channel can be obtained by comparing the output power of the downlink channel at each test temperature with the output power of the downlink channel at the reference temperature. and the output power of the downlink channel, and generate a temperature compensation table according to the above variation relationship.

S302. After performing temperature compensation on the downlink channel, obtain the current loop gain of the downlink channel; the current loop gain is the difference between the feedback power obtained through the feedback channel at the current operating temperature and the current forward power; the feedback power is The output power of the downlink channel is coupled to obtain it.

After performing temperature compensation on the downlink channel, the base station may further obtain the current loop gain of the downlink channel. The current loop gain is the difference between the feedback power obtained through the feedback channel and the current forward power at the current operating temperature. The memory of the base station may store the initial loop gain during the initial calibration, and then calculate the first difference between the current loop gain and the initial loop gain.

S303. Based on the first difference between the current loop gain and the initial loop gain, determine a gain adjustment amount at the current operating temperature; the initial loop gain is the loop gain of the downlink channel during initial calibration.

Further, the base station may use the above-mentioned first difference as the gain adjustment amount at the current working temperature; or, the base station may also consider the gain of the feedback channel at the current working temperature and the initial calibration temperature on the basis of the above-mentioned first difference To further determine the accurate gain adjustment amount; the method for determining the gain adjustment amount is not limited here. Further, the base station may compare the gain adjustment amount with a target adjustment threshold, and perform gain adjustment on the downlink channel when the gain adjustment amount is smaller than the target adjustment threshold.

In the above gain control method, the base station first performs temperature compensation on the downlink channel according to the difference between the current operating temperature and the initial calibration temperature, so that the feedback power obtained by the feedback channel eliminates the influence of part of the temperature change on the feedback power, and improves the feedback channel. The accuracy of the power, and then obtain a more accurate current loop gain; further determine the gain adjustment amount of the downlink channel according to the difference between the current loop gain and the initial loop gain, so that the gain adjustment amount is more accurate, so that the downlink channel can be accurately adjusted. gain control.

FIG. 5 is a schematic flowchart of a gain control method in another embodiment. This embodiment relates to a way for a base station to determine a gain adjustment amount based on a first difference. On the basis of the above embodiment, as shown in FIG. 5 , the above S303 include:

S401. Obtain an initial feedback gain compensation amount of the feedback channel at an initial calibration temperature and a current feedback gain compensation amount at a current working temperature according to a preset temperature compensation table of the feedback channel.

S402. Calculate a second difference between the current feedback gain compensation amount and the initial feedback gain compensation amount.

S403. Determine the sum of the first difference and the second difference as a gain adjustment amount.

The temperature compensation table of the feedback channel may also be stored in the memory of the base station. The temperature compensation table of the feedback channel is similar to the temperature compensation table of the downlink channel, and may include the temperature compensation amount of the feedback channel relative to the reference temperature at each operating temperature. The above temperature compensation represents the change of the attenuation of the feedback channel at different temperatures.

Specifically, the base station may acquire the initial feedback gain compensation amount of the feedback channel at the initial calibration temperature and the current feedback gain compensation amount at the current working temperature according to the temperature compensation table of the feedback channel. Further, the base station may calculate a second difference between the current feedback gain compensation amount and the initial feedback gain compensation amount, and then determine the sum of the first difference and the second difference as the gain adjustment amount. Further, the base station may adjust the gain of the downlink channel according to the gain adjustment amount.

The manner in which the base station adjusts the gain of the downlink channel according to the gain adjustment amount is the same as the manner in which the attenuation amount of the attenuator corresponding to the downlink channel is adjusted according to the third difference value in S301 above, and details are not repeated here.

In an implementation manner, the temperature compensation table of the feedback channel can be obtained through high and low temperature tests. The staff can place the base station in a high and low temperature box, and pre-set a reference temperature of the incubator, such as 25 degrees Celsius, so that the base station is powered on and in a normal working state and remains stable. By adjusting the analog attenuator and digital attenuator, the output power of the downlink channel is the rated output power, read and record the temperature and feedback power of the feedback channel. Further, by adjusting the attenuation of the analog attenuator and the digital attenuator, the output power of the downlink channel is kept constant, and the temperature of the high and low temperature box is adjusted according to the preset temperature interval (for example, 5 degrees Celsius) and kept for a period of time, read respectively Take and record the temperature and feedback power of the feedback channel. Finally, by sorting out the high and low temperature test data, the feedback channel temperature and feedback power at each test temperature can be compared with the feedback channel temperature and feedback power at the reference temperature to obtain the relationship between the feedback channel temperature and feedback power. A variation relationship, and a temperature compensation table of the feedback channel is generated according to the variation relationship.

In the above gain control method, the base station jointly determines the gain adjustment amount based on the difference between the loop gain and the temperature compensation amount of the feedback channel, so that the gain adjustment amount can include the influence of temperature changes on the gain of the downlink channel, and can also include The influence of the temperature change on the gain of the feedback channel makes the gain adjustment more accurate, thereby performing accurate gain control on the downlink channel.

FIG. 6 is a schematic flow chart of a gain control method in another embodiment. On the basis of the above embodiment, a DPD module is included between the baseband unit and the downlink channel. This embodiment relates to a way for the base station to monitor the DPD module. As shown in Figure 6, the above method also includes:

S501. Detect the input power of the DPD module and the output power of the DPD module.

The base station can detect the input power and output power of the DPD module through the FPGA. The above input power of the DPD module and the output power of the DPD module may be peak power, average power, or a combination of peak power and average power, which are not limited here.

S502. Calculate a fourth difference between the output power of the DPD module and the input power of the DPD module.

Further, the FPGA module can transmit the input power of the DPD module and the output power of the DPD module to the processor in the base station, so that the processor can obtain the fourth difference between the output power of the DPD module and the input power of the DPD module.

S503. If the fourth difference is less than or equal to the preset second difference threshold, continue to detect the current working temperature of the downlink channel under the current working environment, and determine the gain of the downlink channel under the current working temperature according to the current working temperature Adjustment steps.

The base station can monitor the working state of the DPD module according to the fourth difference, and determine whether the DPD module outputs an abnormally large signal. If the fourth difference is greater than the preset second difference threshold, the base station may consider that the DPD module is abnormal, and may output a DPD abnormal alarm. If the fourth difference is less than or equal to the preset second difference threshold, the base station can continue to detect the current working temperature of the downlink channel under the current working environment, and determine the gain of the downlink channel under the current working temperature according to the current working temperature Adjustment steps.

In the above gain control method, the base station monitors the input power and output power of the DPD module, and can give an alarm in time when the DPD module is abnormal, so as to prevent the abnormally large signal generated by the DPD abnormality from entering the downlink channel and causing the power amplifier tube in the downlink channel to burn out. The operation reliability of the base station is improved.

It should be understood that although the various steps in the flow charts of FIGS. 2-6 are shown sequentially as indicated by the arrows, these steps are not necessarily executed sequentially in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and these steps can be executed in other orders. Moreover, at least some of the steps in Figures 2-6 may include multiple steps or stages, these steps or stages are not necessarily executed at the same moment, but may be executed at different moments, the execution of these steps or stages The sequence is not necessarily performed sequentially, but may be performed alternately or alternately with other steps or at least a part of steps or stages in other steps.

In one embodiment, as shown in FIG. 7, a gain control device is provided, including:

A determining module 10, configured to determine the current working mode of the downlink channel; the current working mode is determined by the power range of the signal input to the downlink channel;

A matching module 20, configured to determine a target adjustment threshold matching the current working mode;

A detection module 30, configured to detect the current operating temperature of the downlink channel, and determine the gain adjustment amount of the downlink channel at the current operating temperature according to the current operating temperature;

The adjustment module 40 is configured to adjust the gain of the downlink channel based on the gain adjustment amount when the gain adjustment amount is less than the target adjustment threshold.

The gain control device provided above can execute the above embodiment of the gain control method, and its implementation principle and technical effect are similar, and will not be repeated here.

In one embodiment, on the basis of the above embodiment, as shown in FIG. 8 , the above device further includes an alarm module 50 configured to: output a gain control abnormality alarm when the gain adjustment amount is greater than or equal to the target adjustment threshold .

In one embodiment, on the basis of the above embodiment, as shown in FIG. 9, the above determination module 10 includes:

The detection unit 101 is configured to perform power detection on the baseband signal output by the baseband unit corresponding to the downlink channel under the current environment to obtain the current forward power;

The mode determination unit 102 is configured to determine the current working mode of the downlink channel according to the difference between the preset rated forward power and the current forward power.

In one embodiment, on the basis of the above-mentioned embodiments, the working mode is a high-power working mode or a low-power working mode, and the mode determination unit 102 is specifically configured to: when the difference between the current forward power and the rated input power is less than or If it is equal to the preset first difference threshold, it is determined that the current working mode is a high-power working mode; when the difference between the current forward power and the rated input power is greater than the preset first difference threshold, it is determined that the current The working mode is low power working mode.

In one embodiment, on the basis of the above-mentioned embodiments, the matching module 20 is specifically configured to: determine the target adjustment threshold corresponding to the current working mode according to the preset correspondence between the adjustment threshold and the working mode; the corresponding relationship includes each The corresponding adjustment threshold in working mode.

In one embodiment, on the basis of the foregoing embodiments, as shown in FIG. 10 , the detection module 30 includes:

The compensation unit 301 is used to perform temperature compensation on the downlink channel according to the current operating temperature and the preset temperature compensation table of the downlink channel; the temperature compensation table includes the temperature compensation amount corresponding to each operating temperature, and the temperature compensation amount is the operating temperature relative to the reference temperature gain difference;

The acquisition unit 302 is configured to acquire the current loop gain of the downlink channel after performing temperature compensation on the downlink channel; the current loop gain is the difference between the feedback power obtained through the feedback channel and the current forward power at the current operating temperature ; The feedback power is obtained by coupling the output power of the downlink channel;

The determination unit 303 is configured to determine the gain adjustment amount at the current operating temperature based on the first difference between the current loop gain and the initial loop gain; the initial loop gain is the loop gain of the downlink channel during initial calibration.

In one embodiment, on the basis of the above embodiment, the above determination unit 303 is specifically configured to: obtain the initial feedback gain compensation amount of the feedback channel at the initial calibration temperature according to the preset temperature compensation table of the feedback channel, and The current feedback gain compensation amount at the current working temperature; calculating the second difference between the current feedback gain compensation amount and the initial feedback gain compensation amount; determining the sum of the first difference and the second difference as the gain adjustment amount.

In one embodiment, on the basis of the above embodiment, the compensation unit 301 is specifically configured to: obtain the initial gain compensation amount of the downlink channel at the initial calibration temperature according to the preset temperature compensation table of the downlink channel, and The current gain compensation amount at the current working temperature; calculating a third difference between the current gain compensation amount and the initial gain compensation amount; and adjusting the attenuation amount of the attenuator corresponding to the downlink channel according to the third difference value.

In one embodiment, on the basis of the above embodiment, as shown in Figure 11, the above device also includes a monitoring module 60 for: detecting the input power of the DPD module and the output power of the DPD module; calculating the output power of the DPD module The fourth difference with the input power of the DPD module; if the fourth difference is less than or equal to the preset second difference threshold, continue to detect the current operating temperature of the downlink channel in the current working environment, and according to the current operating temperature Procedure for determining the amount of gain adjustment for the downstream channel at the current operating temperature.

In one embodiment, on the basis of the above embodiment, the monitoring module 60 is further configured to output a DPD abnormal alarm if the fourth difference is greater than the preset second difference threshold.

The gain control device provided above can execute the above embodiment of the gain control method, and its implementation principle and technical effect are similar, and will not be repeated here.

For the specific definition of the gain control device, refer to the above definition of the gain control method, which will not be repeated here. Each module in the above-mentioned gain control device can be fully or partially realized by software, hardware and a combination thereof. The above-mentioned modules can be embedded in or independent of the processor in the computer device in the form of hardware, and can also be stored in the memory of the computer device in the form of software, so that the processor can invoke and execute the corresponding operations of the above-mentioned modules.

In one embodiment, a base station is provided, and its internal structure may be as shown in FIG. 12 . The base station includes a processor, a memory and a network interface connected by a system bus. Wherein, the processor of the base station is used to provide calculation and control capabilities. The memory of the base station includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, computer programs and databases. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage medium. The base station's database is used to store gain control data. The network interface of the base station is used to communicate with external terminals through a network connection. When the computer program is executed by the processor, a gain control method is implemented.

Those skilled in the art can understand that the structure shown in Figure 12 is only a block diagram of a part of the structure related to the solution of this application, and does not constitute a limitation to the computer equipment on which the solution of this application is applied. The specific computer equipment can be More or fewer components than shown in the figures may be included, or some components may be combined, or have a different arrangement of components.

In one embodiment, a base station device is provided, including a memory and a processor, where a computer program is stored in the memory, and the processor implements the following steps when executing the computer program:

Determine the current working mode of the downlink channel; the current working mode is determined by the power range of the signal input to the downlink channel;

Determining a target adjustment threshold that matches the current operating mode;

Detect the current working temperature of the downlink channel, and determine the gain adjustment amount of the downlink channel at the current working temperature according to the current working temperature;

If the gain adjustment amount is smaller than the target adjustment threshold, the gain of the downlink channel is adjusted based on the gain adjustment amount.

In one embodiment, when the processor executes the computer program, the following step is further implemented: when the gain adjustment amount is greater than or equal to the target adjustment threshold, output a gain control abnormal alarm.

In one embodiment, when the processor executes the computer program, the following steps are also implemented: under the current environment, power detection is performed on the baseband signal output by the baseband unit corresponding to the downlink channel to obtain the current forward power; according to the preset rated forward power The difference with the current forward power determines the current working mode of the downlink channel.

In one embodiment, the working mode is a high-power working mode or a low-power working mode, and the processor also implements the following steps when executing the computer program: if the difference between the current forward power and the rated input power is less than or equal to the preset first difference threshold, it is determined that the current working mode is a high-power working mode; if the difference between the current forward power and the rated input power is greater than the preset first difference threshold, then it is determined that the current working mode is a low-power working mode.

In one embodiment, when the processor executes the computer program, the following steps are also implemented: according to the preset correspondence between the adjustment threshold and the working mode, determine the target adjustment threshold corresponding to the current working mode; the corresponding relationship includes the corresponding The adjustment threshold.

In one embodiment, when the processor executes the computer program, the following steps are also implemented: performing temperature compensation on the downlink channel according to the current working temperature and the preset temperature compensation table of the downlink channel; the temperature compensation table includes the temperature compensation corresponding to each working temperature The temperature compensation amount is the gain difference between the working temperature and the reference temperature; after temperature compensation is performed on the downlink channel, the current loop gain of the downlink channel is obtained; the current loop gain is the feedback obtained through the feedback channel at the current working temperature The difference between the power and the current forward power; the feedback power is obtained by coupling the output power of the downlink channel; based on the first difference between the current loop gain and the initial loop gain, determine the gain adjustment amount at the current operating temperature ; The initial loop gain is the loop gain of the downlink channel at the time of initial calibration.

In one embodiment, when the processor executes the computer program, the following steps are also implemented: According to the preset temperature compensation table of the feedback channel, the initial feedback gain compensation amount of the feedback channel at the initial calibration temperature is obtained, and the current operating temperature the current feedback gain compensation amount; calculate the second difference between the current feedback gain compensation amount and the initial feedback gain compensation amount; determine the sum of the first difference and the second difference as the gain adjustment amount.

In one embodiment, when the processor executes the computer program, the following steps are further implemented: According to the preset temperature compensation table of the downlink channel, the initial gain compensation amount of the downlink channel at the initial calibration temperature and the gain compensation amount at the current working temperature are obtained. The current gain compensation amount; calculating a third difference between the current gain compensation amount and the initial gain compensation amount; and adjusting the attenuation amount of the attenuator corresponding to the downlink channel according to the third difference value.

In one embodiment, the following steps are also implemented when the processor executes the computer program: detecting the input power of the DPD module and the output power of the DPD module; calculating the fourth difference between the output power of the DPD module and the input power of the DPD module; if the first The fourth difference is less than or equal to the preset second difference threshold, then continue to perform the steps of detecting the current working temperature of the downlink channel under the current working environment, and determining the gain adjustment amount of the downlink channel under the current working temperature according to the current working temperature .

In one embodiment, when the processor executes the computer program, the following step is further implemented: if the fourth difference is greater than the preset second difference threshold, output a DPD abnormal alarm.

The implementation principles and technical effects of the base station provided in this embodiment are similar to those of the above method embodiments, and will not be repeated here.

In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored, and when the computer program is executed by a processor, the following steps are implemented:

Determine the current working mode of the downlink channel; the current working mode is determined by the power range of the signal input to the downlink channel;

Determining a target adjustment threshold that matches the current operating mode;

Detect the current working temperature of the downlink channel, and determine the gain adjustment amount of the downlink channel at the current working temperature according to the current working temperature;

If the gain adjustment amount is smaller than the target adjustment threshold, the gain of the downlink channel is adjusted based on the gain adjustment amount.

In one embodiment, when the computer program is executed by the processor, the following step is further implemented: when the gain adjustment amount is greater than or equal to the target adjustment threshold, output a gain control abnormal alarm.

In one embodiment, when the computer program is executed by the processor, the following steps are also implemented: under the current environment, perform power detection on the baseband signal output by the baseband unit corresponding to the downlink channel to obtain the current forward power; The difference between the power and the current forward power determines the current working mode of the downlink channel.

In one embodiment, the working mode is a high-power working mode or a low-power working mode. When the computer program is executed by the processor, the following steps are also implemented: if the difference between the current forward power and the rated input power is less than or equal to the preset first A difference threshold, then determine the current working mode is the high power working mode; if the difference between the current forward power and the rated input power is greater than the preset first difference threshold, then determine the current working mode is the low power working mode.

In one embodiment, when the computer program is executed by the processor, the following steps are further implemented: according to the preset correspondence between the adjustment threshold and the work mode, determine the target adjustment threshold corresponding to the current work mode; The corresponding adjustment threshold.

In one embodiment, when the computer program is executed by the processor, the following steps are further implemented: performing temperature compensation on the downlink channel according to the current working temperature and the preset temperature compensation table of the downlink channel; the temperature compensation table includes temperature corresponding to each working temperature Compensation amount, the temperature compensation amount is the gain difference between the working temperature and the reference temperature; after temperature compensation is performed on the downlink channel, the current loop gain of the downlink channel is obtained; the current loop gain is obtained through the feedback channel at the current working temperature The difference between the feedback power and the current forward power; the feedback power is obtained by coupling the output power of the downlink channel; based on the first difference between the current loop gain and the initial loop gain, determine the gain adjustment at the current operating temperature Quantity; the initial loop gain is the loop gain of the downlink channel at the time of initial calibration.

In one embodiment, when the computer program is executed by the processor, the following steps are further implemented: According to the preset temperature compensation table of the feedback channel, the initial feedback gain compensation amount of the feedback channel at the initial calibration temperature is obtained, and the current operating temperature The current feedback gain compensation amount below; calculate the second difference between the current feedback gain compensation amount and the initial feedback gain compensation amount; determine the sum of the first difference and the second difference as the gain adjustment amount.

In one embodiment, when the computer program is executed by the processor, the following steps are further implemented: according to the preset temperature compensation table of the downlink channel, the initial gain compensation amount of the downlink channel at the initial calibration temperature is obtained, and the current operating temperature the current gain compensation amount; calculate the third difference between the current gain compensation amount and the initial gain compensation amount; adjust the attenuation amount of the attenuator corresponding to the downlink channel according to the third difference.

In one embodiment, when the computer program is executed by the processor, the following steps are also implemented: detecting the input power of the DPD module and the output power of the DPD module; calculating the fourth difference between the output power of the DPD module and the input power of the DPD module; if the first The fourth difference is less than or equal to the preset second difference threshold, then continue to perform the steps of detecting the current working temperature of the downlink channel under the current working environment, and determining the gain adjustment amount of the downlink channel under the current working temperature according to the current working temperature .

In one embodiment, when the computer program is executed by the processor, the following step is further implemented: if the fourth difference is greater than the preset second difference threshold, output a DPD abnormal alarm.

The implementation principles and technical effects of the computer storage medium provided in this embodiment are similar to those of the above method embodiments, and will not be repeated here.

Those of ordinary skill in the art can understand that realizing all or part of the processes in the methods of the above embodiments can be completed by instructing related hardware through computer programs, and the computer programs can be stored in a non-volatile computer-readable storage medium , when the computer program is executed, it may include the procedures of the embodiments of the above-mentioned methods. Wherein, any references to memory, storage, database or other media used in the various embodiments provided in the present application may include at least one of non-volatile memory and volatile memory. The non-volatile memory may include read-only memory (Read-Only Memory, ROM), magnetic tape, floppy disk, flash memory or optical memory, and the like. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM).

The technical features of the above embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should be It is considered to be within the range described in this specification.

The above examples only express several implementation modes of the present application, and the description thereof is relatively specific and detailed, but should not be construed as limiting the scope of the patent for the invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of protection of the patent application should be based on the appended claims.

Claims (13)

1. A method of gain control, the method comprising:

determining a current working mode of a downlink channel; the current working mode is determined by the power range of the signal input to the downlink channel;

determining a target adjustment threshold value matched with the current working mode;

detecting the current working temperature of the downlink channel, and determining the gain adjustment quantity of the downlink channel at the current working temperature according to the current working temperature;

And adjusting the gain of the downlink channel based on the gain adjustment amount when the gain adjustment amount is smaller than the target adjustment threshold.

2. The gain control method of claim 1, wherein the method further comprises:

and outputting a gain control abnormality warning when the gain adjustment amount is greater than or equal to the target adjustment threshold.

3. The method of gain control of claim 1, wherein said determining a current operating mode of a downstream channel comprises:

performing power detection on a baseband signal output by a baseband unit corresponding to the downlink channel under the current environment to obtain current forward power;

and determining the current working mode of the downlink channel according to the difference value between the preset rated forward power and the current forward power.

4. The gain control method according to claim 3, wherein the operation mode is a high-power operation mode or a low-power operation mode, and the determining the current operation mode of the downlink channel according to a difference between a preset rated forward power and the current forward power includes:

if the difference value between the current forward power and the rated forward power is smaller than or equal to a preset first difference value threshold value, determining that the current working mode is a high-power working mode;

And if the difference value between the current forward power and the rated forward power is larger than a preset first difference value threshold value, determining that the current working mode is a low-power working mode.

5. A gain control method according to claim 3, wherein said determining a target adjustment threshold that matches said current operating mode comprises:

determining a target adjustment threshold corresponding to the current working mode according to the corresponding relation between a preset adjustment threshold and the working mode; the corresponding relation comprises corresponding adjustment threshold values under each working mode.

6. The method according to any one of claims 3 to 5, wherein the determining the gain adjustment amount of the downlink channel at the current operating temperature according to the current operating temperature includes:

according to the current working temperature and a preset temperature compensation table of the downlink channel, performing temperature compensation on the downlink channel; the temperature compensation table comprises temperature compensation amounts corresponding to all working temperatures, and the temperature compensation amounts are gain difference values of the working temperatures relative to the reference temperature;

after temperature compensation is carried out on the downlink channel, the current loop gain of the downlink channel is obtained; the current loop gain is the difference value between the feedback power obtained through a feedback channel at the current working temperature and the current forward power; the feedback power is obtained by coupling the output power of the downlink channel;

Determining a gain adjustment at the current operating temperature based on a first difference of the current loop gain and an initial loop gain; the initial loop gain is the loop gain of the downlink channel at the initial calibration.

7. The gain control method of claim 6, wherein the determining the gain adjustment amount at the current operating temperature based on the first difference between the current loop gain and an initial loop gain comprises:

acquiring an initial feedback gain compensation amount of the feedback channel at an initial calibration temperature and a current feedback gain compensation amount of the feedback channel at the current working temperature according to a preset temperature compensation table of the feedback channel;

calculating a second difference between the current feedback gain compensation amount and the initial feedback gain compensation amount;

and determining the sum of the first difference value and the second difference value as the gain adjustment amount.

8. The gain control method according to claim 6, wherein the performing temperature compensation on the downstream channel according to the current operating temperature and a preset temperature compensation table of the downstream channel includes:

acquiring an initial gain compensation amount of the downlink channel at an initial calibration temperature and a current gain compensation amount of the downlink channel at the current working temperature according to a preset temperature compensation table of the downlink channel;

Calculating a third difference between the current gain compensation amount and the initial gain compensation amount;

and according to the third difference value, adjusting the attenuation quantity of the attenuator corresponding to the downlink channel.

9. The method according to any one of claims 3-5, wherein a digital predistortion DPD module is included between the baseband unit and the downstream channel, and before detecting a current operating temperature of the downstream channel in a current operating environment and determining a gain adjustment amount of the downstream channel at the current operating temperature according to the current operating temperature, the method further comprises:

detecting the input power of the DPD module and the output power of the DPD module;

calculating a fourth difference between the output power of the DPD module and the input power of the DPD module;

if the fourth difference value is smaller than or equal to a preset second difference value threshold value, continuing to execute the steps of detecting the current working temperature of the downlink channel in the current working environment and determining the gain adjustment amount of the downlink channel in the current working temperature according to the current working temperature.

10. The gain control method of claim 9, wherein the method further comprises:

And if the fourth difference value is larger than a preset second difference value threshold value, outputting a DPD abnormality alarm.

11. A gain control apparatus, the apparatus comprising:

the determining module is used for determining a current working mode of a downlink channel, wherein the current working mode is determined by a power range of a signal input to the downlink channel;

the matching module is used for determining a target adjustment threshold matched with the current working mode;

the detection module is used for detecting the current working temperature of the downlink channel and determining the gain adjustment quantity of the downlink channel at the current working temperature according to the current working temperature;

and the adjusting module is used for adjusting the gain of the downlink channel based on the gain adjustment amount under the condition that the gain adjustment amount is smaller than the target adjustment threshold value.

12. A base station comprising a memory and a processor, the memory storing a computer program, characterized in that the processor implements the steps of the method of any of claims 1 to 10 when the computer program is executed.

13. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the method of any of claims 1 to 10.

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