CN205901785U - Modulating device based on vector - Google Patents

Abstract

The utility model discloses a vector-based modulation device. The vector-based modulation device includes a configuration unit for receiving user configuration information so as to map the digital signal to a corresponding vector signal; and a look-up table unit for storing the digital signal, the corresponding vector signal and the corresponding vector signal in the form of a look-up table. The mapping relationship is also used to search the look-up table according to the input digital signal and output the corresponding vector signal. This application makes the signal modulation method configurable through the configuration unit and the lookup table unit, and the digital signal is mapped into a vector signal, so that phase and amplitude modulation can be realized at the same time, so the modulation method of this application is compatible with any existing modulation method, including Rectangular QAM, Cardioid QAM, PSK and ASK etc.

Description

A Modulation Device Based on Vector

technical field

The utility model relates to the field of modulation technology, in particular to a vector-based modulation device.

Background technique

The so-called digital modulation is the process of using the digital baseband signal to be transmitted to control the parameters of the carrier to make it change with the change of the digital baseband signal. Digital modulation is used to adapt the baseband signal to be transmitted to the channel. There are many types of digital modulation, mainly digital amplitude modulation (digital amplitude modulation), digital frequency modulation (digital FM), and digital phase modulation (digital phase modulation). Since the digital baseband signal can only take discrete finite values, the corresponding carrier parameter can only take discrete finite values, and the modulated signal can be regarded as the result of the digital baseband signal controlling the switch to switch the carrier of different parameters. This implementation method is called keying method. Therefore, the above three basic digital modulation methods are usually called ASK (Amplitude Shift Keying), FSK (Frequency Shift Keying), and PSK (Phase Shift Keying). On the basis of the basic digital modulation method, QAM (Quadrature Amplitude Modulation) is derived, which is essentially a hybrid modulation of ASK and PSK.

In the prior art, no matter what kind of modulation method is used, the method of mapping from digital signal to modulation symbol is fixed, cannot be programmed, and is not compatible with each other. In the existing modulation technology, the relative positions of the constellation points in the constellation diagram are fixed and cannot be programmed, and the constellation points cannot be arbitrarily selected according to actual needs.

Utility model content

Aiming at the defect that various modulation modes in the prior art are not compatible with each other and cannot be programmed, the utility model provides a vector-based modulation device and modulation method.

The technical scheme that the utility model proposes with respect to above-mentioned technical problem is as follows:

In one aspect, a vector-based modulation device is provided, comprising:

The configuration unit is configured to receive user configuration information so as to map the digital signal to a corresponding vector signal; and

The lookup table unit is used to store the digital signal, the corresponding vector signal and its mapping relationship in the form of a lookup table, and is also used to look up the lookup table according to the input digital signal and output the corresponding vector signal.

Preferably, the vector signal is any vector signal in any quadrant of the constellation diagram, and is different in the constellation diagram.

Preferably, in the constellation diagram, the vector signals are mutually independent.

Preferably, the look-up table unit is a register.

Implementing the embodiment of the utility model has the following beneficial effects: the application makes the signal modulation mode configurable and programmable through the configuration unit and the look-up table unit, and the digital signal is mapped into a vector signal, so that phase and amplitude modulation can be realized at the same time, so The modulation method of the present application is compatible with any existing modulation method, including rectangular QAM, cardioid QAM, PSK, and ASK.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a typical block diagram of the communication system provided by the embodiment of the utility model;

Fig. 2 is a structural schematic diagram of the modulation device shown in Fig. 1;

Fig. 3 is the modulation method flowchart that the utility model provides;

4a and 4b are schematic structural diagrams of constellation diagrams provided by embodiments of the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Communication Systems

Fig. 1 is a typical block diagram of a communication system provided by an embodiment of the present invention. The communication system 100 includes: a source coding device 102 , a channel coding device 104 , a modulation device 106 , a channel 108 , a demodulation device 110 , a channel decryption device 112 and a source coding device 114 . The source encoder 102 is used to receive the source 151 to be sent. The information source encoding device 102 is configured to encode the information source 151 and generate an information source encoded signal 152 . The channel coding device 104 is configured to perform channel coding on the source coded signal 152 and generate a channel coded signal 153 . The modulation device 106 is used for modulating the coded signal 153 into a signal 154 to be transmitted.

The signal to be transmitted 154 provides a received signal 155 to the receiving end through the channel 108 . The channel 108 includes, but is not limited to, a microwave radio frequency link, satellite channel, fiber optic cable, composite fiber optic cable system, or copper cable. The channel 108 includes a propagation medium that can introduce interference and distortion into the signal to be transmitted 154 such that the received signal 155 differs from the signal 154 to be transmitted. Interference and distortion include, but are not limited to, noise, attenuation, phase shift changes, and the like.

The demodulation device 110 is used for demodulating the received signal 155 into a demodulated signal 156 . The channel decoding device 112 is used for decoding the demodulated signal 156 into a channel decoded signal 157 . The source decoding device 114 is used to further decode the channel decoded signal 157 into a target signal 158 . The target signal 158 is provided to one or more receiver user devices. The one or more receiver user devices include, but are not limited to, personal computers, digital terminal equipment, telephone devices, personal digital assistants, software applications, or any other device that can send or receive data.

modulation device

Fig. 2 is a schematic structural diagram of a modulation device provided by an embodiment of the present invention. The modulation device 106 includes: a configuration unit 202 and a lookup table unit 204 . The configuration unit 202 is used for receiving user configuration information 251 so as to map digital signals to corresponding vector signals. The use of the configuration unit 202 makes the mapping relationship of this application programmable. Therefore, the user can select an appropriate vector signal and define an appropriate mapping relationship according to actual needs. In this way, the modulation device provided by the present application can match all existing modulation methods, and can also select the most suitable vector signal and mapping relationship for modulation according to actual communication requirements. The lookup table unit 204 is used to store digital signals, corresponding vector signals and their mapping relationship in the form of a lookup table, and is also used to look up the lookup table according to the input digital signal 153 and output the corresponding vector signal 154 (that is, the signal to be transmitted) ). Choose to store the vector signal selected by the user and the defined mapping relationship in the form of a lookup table, so that the mapping relationship and vector signal can be changed at will. In an embodiment of the present invention, the mapping relationship between the digital signal and the vector signal is one-to-one mapping.

In an embodiment of the present invention, as shown in Fig. 4a and 4b, the vector signals A1-A8 can be any vector signals in any quadrant of the constellation diagram, and they are different in the constellation diagram. As shown in Fig. 4a, the vector signals A1-A8 can be selected from the same quadrant of the constellation diagram. As shown in FIG. 4b, the vector signals A1-A8 can also be selected from different quadrants of the constellation diagram. However, whether they come from the same quadrant or from different quadrants, the vector signals A1-A8 are different in the constellation diagram, so that the mapping relationship between the digital signal and the vector signal can be guaranteed to be one-to-one mapping.

In another embodiment provided by the present invention, as shown in Figs. 4a and 4b, the vector signals A1-A8 can be independent of each other, and there is no dependency between the vector signals. Users can select each vector signal in a targeted manner. It should be understood that the user can individually configure each vector signal according to actual needs so that there is a specific correlation between them. In this way, when compatibility with existing modulation methods is required, the vector signal can be configured to meet the existing modulation methods.

In an embodiment provided by the present invention, the lookup table unit 204 is a register. The input digital signal 153 may be an address signal of a register, and the vector signal 154 corresponding to the digital signal 154 may be stored in the register. When a specific address signal 153 is input, the register 204 automatically outputs the vector signal 154 stored in the address. The corresponding relationship between address signals and vector signals can be configured through the configuration unit 202 .

This application makes the signal modulation method configurable and programmable through the configuration unit and the lookup table unit, and the digital signal is mapped into a vector signal, so that phase and amplitude modulation can be realized at the same time, so the modulation method of this application is compatible with any existing modulation Ways, including rectangular QAM, cardioid QAM, PSK and ASK, etc.

modulation method

This embodiment provides a vector-based modulation method. As shown in FIG. 3, the vector-based modulation method can be applied to the modulation device described above, and the method may include the following steps:

S1. Receive user configuration information to map digital signals to corresponding vector signals; and

S2. Store the digital signal, the corresponding vector signal and its mapping relationship in the form of a lookup table, look up the lookup table according to the input digital signal, and output the corresponding vector signal.

In an embodiment of the present invention, as shown in Fig. 4a and 4b, the vector signals A1-A8 can be any vector signals in any quadrant of the constellation diagram, and they are different in the constellation diagram. As shown in Fig. 4a, the vector signals A1-A8 can be selected from the same quadrant of the constellation diagram. As shown in FIG. 4b, the vector signals A1-A8 can also be selected from different quadrants of the constellation diagram. However, whether they come from the same quadrant or from different quadrants, the vector signals A1-A8 are different in the constellation diagram, so that the mapping relationship between the digital signal and the vector signal can be guaranteed to be one-to-one mapping.

In another embodiment provided by the present invention, as shown in Figs. 4a and 4b, the vector signals A1-A8 can be independent of each other, and there is no dependency between the vector signals. Users can select each vector signal in a targeted manner. It should be understood that the user can individually configure each vector signal according to actual needs so that there is a specific correlation between them. In this way, when compatibility with existing modulation methods is required, the vector signal can be configured to meet the existing modulation methods.

In an embodiment provided by the present invention, the lookup table is stored in a register. As shown in Table 1 below, the look-up table 1 includes the input digital signals, that is, the address signals 000-111 of the register (assuming that the address signal is 3 bits), and the vector signals A1-A8 corresponding to the digital signals one-to-one. It should be understood that the number of bits of the address signal is 3 in this embodiment is just an example, and is not used to limit the number of bits of the address signal, and the number of bits of the address signal can be designed to meet any modulation mode as required. As shown in FIG. 2 , when a specific address signal 153 is input, the register 204 automatically outputs the vector signal 154 stored in the address according to the lookup table. The corresponding relationship between address signals and vector signals can be configured through the configuration unit 202 .

Table 1 Lookup table

register address vector signal 000 A1 001 A2 011 A3 010 A4 110 A5 111 A6 101 A7 100 A8

This application makes the signal modulation method configurable and programmable through the configuration unit and the lookup table unit, and the digital signal is mapped into a vector signal, so that phase and amplitude modulation can be realized at the same time, so the modulation method of this application is compatible with any existing modulation Ways, including rectangular QAM, cardioid QAM, PSK and ASK, etc.

What is disclosed above is only a preferred embodiment of the present utility model, and of course it cannot be used to limit the scope of rights of the present utility model. Those of ordinary skill in the art can understand all or part of the process of realizing the above-mentioned embodiments, and according to this Equivalent changes made to the claims of the utility model still fall within the scope of the utility model.

Claims (4)

1. a kind of modulating device based on vector is it is characterised in that include:

Dispensing unit, for receive user configuration information thus digital signal is mapped to corresponding vector signal；And

Look-up table unit, for storing described digital signal, corresponding vector signal and its mapping relations in the form of a lookup table, It is additionally operable to the digital signal according to input to search described look-up table and export corresponding vector signal.

2. the modulating device based on vector according to claim 1 is it is characterised in that described vector signal is in planisphere Any vector signal arbitrarily in quadrant, and different in planisphere.

3. the modulating device based on vector according to claim 2 is it is characterised in that in planisphere, described vector is believed It is separate between number.

4. modulating device according to claim 1 is it is characterised in that described look-up table unit is depositor.