CN110149122A - A kind of the radio frequency self-interference compensation device and method of wide frequency coverage - Google Patents

Abstract

The invention discloses a radio frequency self-interference cancellation device and method with wide frequency coverage, including an interference reference signal down-conversion module, a radio frequency domain interference reconstruction module, an interference reconstruction signal up-conversion module, a synthetic interference cancellation module, a power division module and Interference control module; the output end of the interference reference signal down-conversion module is connected to the power division module through the radio frequency domain interference reconstruction module, the interference reconstruction signal up-conversion module, and the synthetic interference cancellation module. It is divided into two channels, one for external output and one for feedback to the interference control module. The invention converts the frequency of the interference reference signal to a fixed intermediate frequency by down-converting the wide-frequency interference reference signal, obtains the reconstruction signal through the interference reconstruction module in the radio frequency domain, and then up-converts the reconstruction signal back to the radio frequency wide frequency, and inputs it to the interference synthesis and cancellation module Synthesize with the interfered radio frequency receiving signal to realize interference cancellation and reduce the complexity of interference reconstruction.

Description

Device and method for radio frequency self-interference cancellation with wide frequency coverage

technical field

The invention relates to self-interference cancellation, in particular to a radio frequency self-interference cancellation device and method with wide frequency coverage.

Background technique

At the same time, the same-frequency full-duplex technology breaks through the limitation of time-frequency resource utilization of existing time-division duplex and frequency-division duplex, and has the ability to double the spectrum efficiency. Since the local transmitter and receiver transmit and receive at the same time and frequency at the same time, the transmitted signal of the local transmitter will cause strong self-interference to the local receiver. In order to ensure normal communication, the receiver needs to effectively suppress the self-interference.

In the process of suppressing self-interference signals, it is often necessary to reconstruct radio frequency self-interference signals. However, in the process of self-interference cancellation in the radio frequency domain covered by wide frequency (such as 30MHz~6000MHz), due to the wide frequency coverage, if the direct Reconstructing the interference signal will have the problems of great difficulty in implementation, high device cost, and high reconstruction complexity.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies of the prior art, and provide a radio frequency self-interference cancellation device and method with wide frequency coverage. By down-converting the wide-frequency interference reference signal, the frequency of the interference reference signal is converted to a fixed intermediate frequency. The RF domain interference reconstruction module controlled by the control module obtains the reconstruction signal, and then up-converts the reconstruction signal back to the RF wide frequency, and inputs it to the interference synthesis and cancellation module to synthesize the interfered RF reception signal to achieve interference cancellation and reduce the complexity of interference reconstruction Spend.

The purpose of the present invention is achieved through the following technical solutions: a radio frequency self-interference cancellation device with wide frequency coverage, including an interference reference signal down-conversion module, a radio frequency domain interference reconstruction module, an interference reconstruction signal up-conversion module, and a synthetic interference pair Elimination module, power division module and interference control module;

The interference reference signal down-conversion module receives an external wide-frequency interference reference signal, and the output of the interference reference signal down-conversion module sequentially passes through a radio frequency domain interference reconstruction module, an interference reconstruction signal up-conversion module, a synthetic interference cancellation module, and a power division module connected, the power division module divides the signal from the interference cancellation module into two paths, one path is output externally, and the other path is fed back to the interference control module;

The interference reference signal down-conversion module uses segmental filtering and frequency mixing to down-convert the received wide-frequency reference signal to obtain a fixed intermediate frequency interference reference signal, which is filtered and amplified and then transmitted to the radio frequency domain interference reconstruction module;

The radio frequency domain interference reconstruction module is used to divide the power of the intermediate frequency interference reference signal, and perform phase shifting, time delay and amplification under the control of the interference control module, and finally synthesize the reconstruction signal to obtain the interference reconstruction under the fixed intermediate frequency frequency Signal;

The interference reconstruction signal up-conversion module is used to up-convert the fixed intermediate frequency interference reconstruction signal back to a wide-frequency radio frequency, so that the combined interference cancellation module can complete Self-interference cancellation;

Synthetic interference cancellation module, which is used to synthesize the up-converted wide-frequency interference reconstruction signal and the interfered radio frequency reception signal to realize self-interference cancellation;

The interference control module is used to realize the delay, gain and phase shift estimation of the self-interference channel for the canceled signal according to the canceled signal fed back by the power division module, and obtain the estimated parameters of the self-interference signal, according to which Adjust the parameters of the interference reconstruction module in the radio frequency domain.

Preferably, the self-interference cancellation device further includes a local oscillator signal source, the local oscillator signal source is used to provide the local oscillator required for the frequency mixing of the interference reference signal down-conversion module and the interference reconstruction signal up-conversion module, and its output terminal They are respectively connected with the interference reference signal down-conversion module and the interference reconstruction signal up-conversion module.

Preferably, the interference reference signal down-conversion module includes a first segmental radio frequency filtering unit, a first segmental mixing unit, and a first intermediate frequency amplification filtering unit connected in sequence;

The first subsection radio frequency filtering unit includes a first switch, a second switch and a plurality of first radio frequency filters, and the input ends of each first radio frequency filter receive an external wide-frequency interference reference through the first switch. signal, the output ends of each of the first radio frequency filters are connected to the first subsection mixing unit through the second switching switch;

The first subsection mixing unit includes a third switch, a fourth switch and a plurality of first mixers; the first mixer is used for down-converting the radio frequency signal from the third switch; each The first input terminals of the first mixers are all connected to the second switching switches in the segmental radio frequency filter unit through the third switch, and the second input terminals of each first mixer are connected to the local oscillator signal source, each The output ends of the first mixer are all connected to the first intermediate frequency filtering and amplifying module through the fourth switch;

The first intermediate frequency amplification and filtering unit includes a first intermediate frequency amplifier and a first intermediate frequency filter, the input of the first intermediate frequency amplifier is connected with the fourth switch in the section mixing unit, and the output of the first intermediate frequency amplifier It is connected with the interference reconstruction module in the radio frequency domain through the first intermediate frequency filter.

Preferably, the radio frequency domain interference reconstruction module includes a power divider, a combiner and a multi-path interference reconstruction unit;

The input end of the power splitter is connected to the interference reference signal down-conversion module, the output end of the power splitter is connected to each interference reconstruction unit respectively, and the output end of each interference reconstruction unit is connected to a sum synthesizer, and the synthesizer The output end of the interference reconstruction signal is connected to the frequency conversion module;

The control input end of each interference reconstruction unit is connected to the interference control module for phase shifting, time delay and amplification of the input signal under the control of the interference control module, and then transmitted to the synthesizer for synthesis of the reconstruction signal.

Preferably, the interference reconstruction signal up-conversion module includes a second intermediate frequency amplification and filtering unit, a second segmental mixing unit, and a second segmental radio frequency filtering unit;

The second intermediate frequency amplification and filtering unit includes a second intermediate frequency amplifier and a second intermediate frequency filter, the input of the second intermediate frequency amplifier is connected to the radio frequency domain interference reconstruction module, and the output of the second intermediate frequency amplifier passes through the second intermediate frequency The filter is connected to the second subsection mixing unit;

The second section mixing unit includes a fifth switching switch, a sixth switching switch and a plurality of second mixers; the second mixer is used for up-converting the signal from the fifth switching switch, each of the sixth switching switches The first input ends of the two mixers are all connected to the second intermediate frequency filter in the second intermediate frequency amplification filter unit through the fifth switch, and the second input ends of each second mixer are connected to the local oscillator signal source, The output ends of each of the second mixers are connected to the second subsection radio frequency filter unit through the sixth switch;

The second subsection radio frequency filter unit includes the seventh switch, the eighth switch and a plurality of second radio frequency filters; the input ends of each second radio frequency filter are mixed with the second section through the seventh switch The sixth switching switch in the unit is connected; the output ends of each radio frequency filter are connected to the combined interference cancellation module through the eighth switching switch.

The method for realizing self-interference cancellation by a radio frequency self-interference cancellation device with wide frequency coverage comprises the following steps:

S1. The interference reference signal down-conversion module receives an external wide-frequency interference reference signal, and uses segmental filtering and frequency mixing to down-convert the received wide-frequency reference signal to obtain a fixed intermediate frequency interference reference signal, which is filtered and amplified transmitted to the radio frequency domain interference reconstruction module;

S2. The radio frequency domain interference reconstruction module divides the power of the intermediate frequency interference reference signal, and performs phase shifting, time delay and amplification under the control of the interference control module, and finally synthesizes the reconstruction signal to obtain the interference reconstruction signal at a fixed intermediate frequency frequency;

S3. The interference reconstruction signal up-conversion module up-converts the fixed intermediate frequency interference reconstruction signal back to the radio frequency of the wide frequency, so that the synthetic interference cancellation module can complete the interference cancellation without performing frequency conversion processing on the interfered radio frequency receiving signal ;

S4. The synthetic interference cancellation module synthesizes the up-converted wide-frequency interference reconstruction signal and the interfered radio frequency reception signal to realize self-interference cancellation;

S5. The power division module divides the signal from the interference cancellation module into two channels, one for external output and one for feedback to the interference control module;

S6. The interference control module realizes the delay, gain and phase shift estimation of the self-interference channel for the canceled signal according to the canceled signal fed back by the power division module, and obtains the estimated parameters of the self-interference signal, and accordingly performs the estimation in the radio frequency domain The parameters of the interference reconstruction module are adjusted.

The beneficial effects of the present invention are: the present invention converts the frequency of the interference reference signal to a fixed intermediate frequency by down-converting the wide-frequency interference reference signal, obtains the reconstruction signal through the radio frequency domain interference reconstruction module controlled by the interference control module, and then up-converts the reconstruction signal The return radio frequency is wide, input to the interference synthesis and cancellation module and the interfered radio frequency receiving signal is synthesized to realize interference cancellation and reduce the complexity of interference reconstruction; at the same time, the power division module divides the synthesized signal into two channels, and one is output to the outside , one channel is input to the interference control module to form a closed loop, and the interference control module performs self-interference channel estimation to adjust the parameters of the interference reconstruction module in the radio frequency domain to achieve a better cancellation effect.

Description of drawings

Fig. 1 is a system block diagram of the present invention;

Figure 2 is a block diagram of the interference reference signal down-conversion module

Fig. 3 is the schematic diagram of the principle of the first subsection radio frequency filtering module and the first subsection mixing module;

Fig. 4 is a functional block diagram of the radio frequency domain interference reconstruction module;

Fig. 5 is a functional block diagram of the up-conversion module of the interference reconstruction signal;

Fig. 6 is a schematic diagram of the principle of the second subsection frequency mixing module and the second subsection radio frequency filter;

Fig. 7 is a flow chart of the method of the present invention.

Detailed ways

The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.

As shown in Figure 1, a radio frequency self-interference cancellation device with wide frequency coverage includes an interference reference signal down-conversion module, a radio frequency domain interference reconstruction module, an interference reconstruction signal up-conversion module, a synthetic interference cancellation module, a power division module and Interference control module;

The interference reference signal down-conversion module receives an external wide-frequency interference reference signal, and the output of the interference reference signal down-conversion module sequentially passes through a radio frequency domain interference reconstruction module, an interference reconstruction signal up-conversion module, a synthetic interference cancellation module, and a power division module connected, the power division module divides the signal from the interference cancellation module into two paths, one path is output externally, and the other path is fed back to the interference control module;

The interference reference signal down-conversion module uses segmental filtering and frequency mixing to down-convert the received wide-frequency reference signal to obtain a fixed intermediate frequency interference reference signal, which is filtered and amplified and then transmitted to the radio frequency domain interference reconstruction module;

The radio frequency domain interference reconstruction module is used to divide the power of the intermediate frequency interference reference signal, and perform phase shifting, time delay and amplification under the control of the interference control module, and finally synthesize the reconstruction signal to obtain the interference reconstruction under the fixed intermediate frequency frequency Signal;

The interference reconstruction signal up-conversion module is used to up-convert the fixed intermediate frequency interference reconstruction signal back to a wide-frequency radio frequency, so that the combined interference cancellation module can complete Self-interference cancellation;

Synthetic interference cancellation module, which is used to synthesize the up-converted wide-frequency interference reconstruction signal and the interfered radio frequency reception signal to realize self-interference cancellation;

The interference control module is used to realize the delay, gain and phase shift estimation of the self-interference channel for the canceled signal according to the canceled signal fed back by the power division module, and obtain the estimated parameters of the self-interference signal, according to which Adjust the parameters of the interference reconstruction module in the radio frequency domain.

In an embodiment of the present application, the self-interference cancellation device further includes a local oscillator signal source, and the local oscillator signal source is used to provide the local signal required for frequency mixing by the interference reference signal down-conversion module and the interference reconstruction signal up-conversion module. vibration, the output terminals of which are respectively connected to the interference reference signal down-conversion module and the interference reconstruction signal up-conversion module. In this embodiment, the local oscillator signal source includes a clock module and a plurality of PLL frequency multipliers, and each PLL frequency multiplier is used to generate frequency multiplied signals of different frequencies for the interference reference signal down-conversion module and the interference reconstruction signal up-conversion required by the module.

As shown in Figures 2 to 3, the interference reference signal down-conversion module includes a first segmental radio frequency filtering unit, a first segmental mixing unit, and a first intermediate frequency amplification filtering unit connected in sequence;

The first subsection radio frequency filtering unit includes a first switch, a second switch and a plurality of first radio frequency filters, and the input ends of each first radio frequency filter receive an external wide-frequency interference reference through the first switch. signal, the output ends of each of the first radio frequency filters are connected to the first subsection mixing unit through the second switching switch;

The first subsection mixing unit includes a third switch, a fourth switch and a plurality of first mixers; the first mixer is used for down-converting the radio frequency signal from the third switch; each The first input terminals of the first mixers are all connected to the second switching switches in the segmental radio frequency filter unit through the third switch, and the second input terminals of each first mixer are connected to the local oscillator signal source, each The output ends of the first mixer are all connected to the first intermediate frequency filtering and amplifying module through the fourth switch;

The first intermediate frequency amplification and filtering unit includes a first intermediate frequency amplifier and a first intermediate frequency filter, the input of the first intermediate frequency amplifier is connected with the fourth switch in the section mixing unit, and the output of the first intermediate frequency amplifier It is connected with the interference reconstruction module in the radio frequency domain through the first intermediate frequency filter.

As shown in Figure 4, the radio frequency domain interference reconstruction module includes a power divider, a synthesizer and a multi-path interference reconstruction unit;

The input end of the power splitter is connected to the interference reference signal down-conversion module, the output end of the power splitter is connected to each interference reconstruction unit respectively, and the output end of each interference reconstruction unit is connected to a sum synthesizer, and the synthesizer The output end of the interference reconstruction signal is connected to the frequency conversion module;

The control input end of each interference reconstruction unit is connected to the interference control module for phase shifting, time delay and amplification of the input signal under the control of the interference control module, and then transmitted to the synthesizer for synthesis of the reconstruction signal. Specifically, in the embodiment of the present application, each interference reconstruction unit includes an adjustable phase shifter, an adjustable delayer, and an adjustable gain amplifier; the input end of the adjustable phase shifter is connected to a power divider, which can The output terminal of the adjustable phase shifter is connected with the synthesizer through the adjustable delayer and the adjustable gain amplifier in turn; the control input terminals of each adjustable phase shifter, adjustable delayer and adjustable gain amplifier are connected with the interference control Module connection; the interference control module adjusts the parameters of the entire radio frequency domain interference reconstruction module by adjusting the phase shift, time delay and amplification parameters of each interference reconstruction unit.

As shown in Figures 5 to 6, the interference reconstruction signal up-conversion module includes a second intermediate frequency amplification and filtering unit, a second segmental mixing unit and a second segmental radio frequency filtering unit;

The second intermediate frequency amplification and filtering unit includes a second intermediate frequency amplifier and a second intermediate frequency filter, the input of the second intermediate frequency amplifier is connected to the radio frequency domain interference reconstruction module, and the output of the second intermediate frequency amplifier passes through the second intermediate frequency The filter is connected to the second subsection mixing unit;

The second section mixing unit includes a fifth switching switch, a sixth switching switch and a plurality of second mixers; the second mixer is used for up-converting the signal from the fifth switching switch, each of the sixth switching switches The first input ends of the two mixers are all connected to the second intermediate frequency filter in the second intermediate frequency amplification filter unit through the fifth switch, and the second input ends of each second mixer are connected to the local oscillator signal source, The output ends of each of the second mixers are connected to the second subsection radio frequency filter unit through the sixth switch;

The second subsection radio frequency filter unit includes the seventh switch, the eighth switch and a plurality of second radio frequency filters; the input ends of each second radio frequency filter are mixed with the second section through the seventh switch The sixth switching switch in the unit is connected; the output ends of each radio frequency filter are connected to the combined interference cancellation module through the eighth switching switch.

As shown in Figure 7, the method for implementing self-interference cancellation by a radio frequency self-interference cancellation device with wide frequency coverage includes the following steps:

S1. The interference reference signal down-conversion module receives an external wide-frequency interference reference signal, and uses segmental filtering and frequency mixing to down-convert the received wide-frequency reference signal to obtain a fixed intermediate frequency interference reference signal, which is filtered and amplified transmitted to the radio frequency domain interference reconstruction module;

S2. The radio frequency domain interference reconstruction module divides the power of the intermediate frequency interference reference signal, and performs phase shifting, time delay and amplification under the control of the interference control module, and finally synthesizes the reconstruction signal to obtain the interference reconstruction signal at a fixed intermediate frequency frequency;

S3. The interference reconstruction signal up-conversion module up-converts the fixed intermediate frequency interference reconstruction signal back to the radio frequency of the wide frequency, so that the synthetic interference cancellation module can complete the interference cancellation without performing frequency conversion processing on the interfered radio frequency receiving signal ;

S4. The synthetic interference cancellation module synthesizes the up-converted wide-frequency interference reconstruction signal and the interfered radio frequency reception signal to realize self-interference cancellation;

S5. The power division module divides the signal from the interference cancellation module into two channels, one for external output and one for feedback to the interference control module;

S6. The interference control module realizes the delay, gain and phase shift estimation of the self-interference channel for the canceled signal according to the canceled signal fed back by the power division module, and obtains the estimated parameters of the self-interference signal, and accordingly performs the estimation in the radio frequency domain The parameters of the interference reconstruction module are adjusted.

In summary, the present invention converts the frequency of the interference reference signal to a fixed intermediate frequency by down-converting the wide-frequency interference reference signal, obtains the reconstruction signal through the radio-frequency domain interference reconstruction module controlled by the interference control module, and then up-converts the reconstruction signal back to the radio-frequency wide frequency , input to the interference synthesis and cancellation module to synthesize the interfered radio frequency receiving signal to achieve interference cancellation and reduce the complexity of interference reconstruction; at the same time, the power division module divides the synthesized signal into two channels, one for output and one for input to The interference control module forms a closed loop, and the interference control module performs self-interference channel estimation to adjust the parameters of the interference reconstruction module in the radio frequency domain to achieve a better cancellation effect.

The above description is the preferred implementation of the present invention, it should be understood that the present invention is not limited to the forms disclosed herein, should not be regarded as excluding other embodiments, but can be used in other combinations, modifications and environments, and can be described herein Modifications within the scope of this concept are made by the teachings above or by skill or knowledge in the relevant art. However, changes and changes made by those skilled in the art do not depart from the spirit and scope of the present invention, and should all be within the protection scope of the appended claims of the present invention.

Claims (6)

1. a kind of radio frequency self-interference compensation device of wide frequency coverage, it is characterised in that: including interfering reference signal down coversion mould Block, radio frequency domains disturbance reconstruction module, disturbance reconstruction signal up-converter module, cumulative interference offset module, function sub-module and interference Control module；

Wide frequency interferences reference signal outside the interference reference signal down conversion module reception, interferes reference signal down coversion The output end of module passes sequentially through radio frequency domains disturbance reconstruction module, disturbance reconstruction signal up-converter module, cumulative interference and offsets mould Block is connect with function sub-module, and the signal that the function sub-module self-interference in future offsets module is divided into two-way, all the way externally output, and one Road feeds back to interference control module；

The interference reference signal down conversion module believes the wide frequency reference received by the way of region filtering mixing Number carry out down coversion, obtain the interference reference signal of fixed intermediate frequency, be filtered amplification after be transferred to radio frequency domains disturbance reconstruction mould Block；

The radio frequency domains disturbance reconstruction module, for dividing intermediate frequency interference reference signal function, and in the control of interference control module Lower progress phase shift, time delay and amplification finally carry out the synthesis of reconstruction signal, obtain the disturbance reconstruction letter under fixed intermediate frequency frequency Number；

The disturbance reconstruction signal up-converter module, for the disturbance reconstruction signal up-conversion of fixed intermediate frequency to be returned penetrating for wide frequency Frequent rate, it is complete in order to which cumulative interference offsets module in the case where not making frequency-conversion processing to the radio frequency receiving signal being disturbed It is offseted at self-interference；

Cumulative interference offsets module, for by after up-conversion wide frequency interferences reconstruction signal and the radio frequency receiving signal that is disturbed It is synthesized, realizes that self-interference offsets；

The interference control module, the signal after offseting for what is fed back according to function sub-module realize that the signal after offseting carries out Delay, gain and the phase shift estimation of self-interference channel, obtain the estimation parameter of self-interference signal, accordingly to radio frequency domains disturbance reconstruction The parameter of module is adjusted.

2. a kind of radio frequency self-interference compensation device of wide frequency coverage according to claim 1, it is characterised in that: it is described from Interference cancellation device further includes local oscillation signal source, and the local oscillation signal source is for providing interference reference signal down conversion module and doing Local oscillator needed for disturbing the mixing of reconstruction signal up-converter module, output end respectively with interference reference signal down conversion module and interference The connection of reconstruction signal up-converter module.

3. a kind of radio frequency self-interference compensation device of wide frequency coverage according to claim 1, it is characterised in that: described dry Disturbing reference signal down conversion module includes sequentially connected first segmented radio frequency filter unit, the first segmentation mixing unit and first Intermediate frequency amplifies filter unit；

The first segmented radio frequency filter unit includes the first switching switch, the second switching switch and multiple first rf filterings Device, the input terminal of each first radio-frequency filter pass through the wide frequency interferences reference signal outside the first switching switch reception, The output end of each first radio-frequency filter passes through the second switching switch and connect with the first segmentation mixing unit；

The first segmentation mixing unit includes third switching switch, the 4th switching switch and multiple first frequency mixers；Described One frequency mixer is used to carry out down coversion to from the radiofrequency signal of third switching switch；The first input end of each first frequency mixer Switched by third switching switch with second in segmented radio frequency filter unit and switchs connection, the second of each first frequency mixer Input terminal is connect with local oscillation signal source, and the output end of each first frequency mixer passes through the 4th switching switch and filters with the first intermediate frequency The connection of wave amplification module；

The first intermediate frequency amplification filter unit includes the first intermediate frequency amplifier and the first intermediate-frequency filter, and first intermediate frequency is put The 4th switching switch connection in the input terminal and segmentation mixing unit of big device, the output end of the first intermediate frequency amplifier pass through first Intermediate-frequency filter is connect with radio frequency domains disturbance reconstruction module.

4. a kind of radio frequency self-interference compensation device of wide frequency coverage according to claim 1, it is characterised in that: described to penetrate It includes power splitter, synthesizer and multichannel disturbance reconstruction unit that frequency domain interference, which rebuilds module,；

The input terminal of the power splitter is connect with interference reference signal down conversion module, and the output end of power splitter is respectively and per all the way Disturbance reconstruction unit connection, the output end of each road disturbance reconstruction unit with and synthesizer connect, the output end of the synthesizer and The connection of disturbance reconstruction signal up-converter module；

Control signal per disturbance reconstruction unit all the way is connect with interference control module, for the control in interference control module Under system, phase shift, time delay and amplification are carried out to the signal of input, and be transferred to the synthesis that synthesizer carries out reconstruction signal.

5. a kind of radio frequency self-interference compensation device of wide frequency coverage according to claim 1, it is characterised in that: described dry Disturbing reconstruction signal up-converter module includes the second intermediate frequency amplification filter unit, the second segmentation mixing unit and the filter of the second segmented radio frequency Wave unit；

The second intermediate frequency amplification filter unit includes the second intermediate frequency amplifier and the second intermediate-frequency filter, and second intermediate frequency is put The input terminal of big device is connect with radio frequency domains disturbance reconstruction module, and the output end of second intermediate frequency amplifier is filtered by the second intermediate frequency Wave device is connect with the second segmentation mixing unit；

The second segmentation mixing unit includes the 5th switching switch, the 6th switching switch and multiple second frequency mixers；Described For two frequency mixers for that will carry out up-conversion from the signal of the 5th switching switch, the first input end of each second frequency mixer is logical It crosses the 5th switching switch and amplifies the second intermediate-frequency filter in filter unit with the second intermediate frequency and connect, the of each second frequency mixer Two input terminals are connect with local oscillation signal source, and the output end of each second frequency mixer passes through the 6th switching switch and the second segmentation RF filtering unit connection；

The second segmented radio frequency filter unit includes the 7th switching switch, the 8th switching switch and multiple second rf filterings Device；The input terminal of each second radio-frequency filter passes through the 7th switching switch and the 6th switching in the second segmentation mixing unit Switch connection；The output end of each radio-frequency filter passes through the 8th switching switch and offsets module with cumulative interference and connect.

6. a kind of radio frequency self-interference compensation device of wide frequency coverage described according to claim 1 ~ any one of 5 realize from The method of interference cancellation, it is characterised in that: the following steps are included:

S1. the wide frequency interferences reference signal outside the reception of interference reference signal down conversion module, is mixed using region filtering Mode, down coversion is carried out to the wide frequency reference signal that receives, the interference reference signal of fixed intermediate frequency is obtained, is filtered Radio frequency domains disturbance reconstruction module is transferred to after amplification；

S2. radio frequency domains disturbance reconstruction module is by intermediate frequency interference reference signal function point, and carries out under the control of interference control module Phase shift, time delay and amplification finally carry out the synthesis of reconstruction signal, obtain the disturbance reconstruction signal under fixed intermediate frequency frequency；

S3. disturbance reconstruction signal up-converter module returns the radio frequency frequency of wide frequency to the disturbance reconstruction signal up-conversion of fixed intermediate frequency Rate is completed dry in order to which cumulative interference offsets module in the case where not making frequency-conversion processing to the radio frequency receiving signal being disturbed It disturbs and offsets；

S4. cumulative interference offsets module for the wide frequency interferences reconstruction signal after up-conversion and the radio frequency receiving signal being disturbed Synthesis realizes that self-interference offsets；

S5. the signal that function sub-module self-interference in future offsets module is divided into two-way, all the way externally output, feeds back to interference control all the way Molding block；

S6. interference control module according to function sub-module feed back offset after signal, realize offset after signal progress self-interference Delay, gain and the phase shift estimation of channel, obtain the estimation parameter of self-interference signal, accordingly to radio frequency domains disturbance reconstruction module Parameter is adjusted.