CN-121984525-A - Method and system for suppressing signal interference of multi-band antenna

CN121984525ACN 121984525 ACN121984525 ACN 121984525ACN-121984525-A

Abstract

The invention relates to the technical field of multi-frequency antennas and discloses a multi-frequency antenna signal interference suppression method and a system, wherein the method comprises the steps of mapping multi-source heterogeneous data acquired by a multi-frequency antenna into a multi-mode feed network; the method comprises the steps of carrying out multi-stream signal aggregation on space electromagnetic signals of multi-source heterogeneous data to obtain mixed signals, coupling the mixed signals to a multi-mode feed network, carrying out space-frequency joint domain decoupling on the mixed signals to obtain separated signal streams, carrying out signal characteristic deconstruction on the separated signal streams to obtain relative interference characteristics, carrying out one-by-one matching on the relative interference characteristics and a preset interference characteristic library, carrying out strategic reconstruction according to a matching result to obtain a suppression strategy, and carrying out vector synthesis on frequency band signals in the multi-source heterogeneous data in the multi-mode feed network based on the suppression strategy to obtain target synthesized signals.

Inventors

LIU XUEPENG
LIAO GUISHENG
ZHANG ZEXIN
HU DIE
Tan Pugang
LIU QIYUAN
GAO SHANG
Zhang Leijiong
LI JIECHEN

Assignees

浙江蓝箭防务科技有限公司

Dates

Publication Date: 20260505
Application Date: 20260408

Claims (10)

1. A method for suppressing signal interference of a multi-band antenna, the method comprising: S1, mapping multi-source heterogeneous data acquired by a multi-band antenna into a multi-mode feed network of the multi-band antenna; s2, carrying out multi-stream signal aggregation on the space electromagnetic signals of the multi-source heterogeneous data to obtain mixed signals of the multi-band antenna; S3, coupling the mixed signal to the multi-mode feed network, and performing space-frequency joint domain decoupling on the mixed signal to obtain a separated signal stream of the multi-band antenna; S4, performing signal characteristic deconstructment on the separated signal flow to obtain the relative interference characteristics of the multi-band antenna; s5, matching the relative interference characteristics with a preset interference characteristic library one by one, and carrying out strategic reconstruction according to a matching result to obtain a suppression strategy of the multi-band antenna; S6, vector synthesis is carried out on the frequency band signals in the multi-source heterogeneous data based on the suppression strategy in the multi-mode feed network, and the target synthesized signals of the multi-band antenna are obtained.
2. The method for suppressing signal interference of a multiband antenna according to claim 1, wherein the mapping the multi-source heterogeneous data collected by the multiband antenna into the multi-mode feed network of the multiband antenna comprises: Carrying out signal analysis on multi-source heterogeneous data acquired by a multi-band antenna to obtain pure signal flow of the multi-band antenna; Estimating the direction of arrival of the pure signal stream to obtain a main signal component of the multi-band antenna; distributing corresponding logic feed ports for the main signal components according to the array structure of the multi-band antenna; performing topology optimization on the initial connection relation between the logic feed ports to obtain a feed network prototype of the multi-band antenna; And carrying out iterative convergence on the excitation parameters of the logic feed port in the feed network prototype and the initial connection relation according to the power and phase relation of the signal components in the pure signal stream to obtain the multi-mode feed network of the multi-band antenna.
3. The method for suppressing signal interference of a multiband antenna according to claim 1, wherein the step of performing multi-stream signal aggregation on the spatial electromagnetic signal of the multi-source heterogeneous data to obtain a mixed signal of the multiband antenna includes: carrying out carrier stripping on the space electromagnetic signals of the multi-source heterogeneous data to obtain multi-channel digital signals of the multi-band antenna; performing amplitude-phase error compensation on the multipath digital signals to obtain calibrated multipath signals of the multiband antenna; Performing spatial coherent synthesis on the calibrated multipath signals to obtain spatial convergence signals of the multiband antenna; and carrying out frequency domain multiplexing integration on the airspace convergence signals to obtain the mixed signals of the multiband antenna.
4. The method of claim 1, wherein coupling the mixed signal to the multi-mode feed network and performing spatial-frequency joint domain decoupling on the mixed signal to obtain separate signal streams of the multi-band antenna comprises: inputting the mixed signal to a logic feed port of the multi-mode feed network to complete distributed injection of the mixed signal; Based on the frequency response characteristic and the space directional characteristic of the logic feed port, performing joint filtering on the injected mixed signal to obtain a signal component of the multi-band antenna; coupling inhibition is carried out on coupling parameters among the logic feed ports according to the cross-correlation characteristics among the signal components, so as to obtain decorrelated signal components of the multi-band antenna; And independently outputting the decorrelated signal components to obtain the separated signal flow of the multi-band antenna.
5. The method for suppressing signal interference of a multiband antenna according to claim 4, wherein the step of jointly filtering the injected mixed signal based on the frequency response characteristic and the spatial directivity characteristic of the logic feed port to obtain the signal component of the multiband antenna comprises: based on the frequency response characteristic of the logic feed port, carrying out frequency band separation on the injected mixed signal to obtain a narrowband signal of the multiband antenna; Based on the space directional characteristic of the logic feed port, performing space domain beam forming on the narrowband signal to obtain a space separation signal of the multiband antenna; extracting a main component of the space separation signal to obtain a refined signal of the multi-band antenna; And integrating the frequency domain attribute and the airspace attribute of the refined signal into the signal component of the multiband antenna.
6. The method for suppressing signal interference of a multiband antenna according to claim 1, wherein the deconstructing signal characteristics of the separated signal stream to obtain relative interference characteristics of the multiband antenna includes: performing empirical mode decomposition on the separated signal flow to obtain a time-frequency distribution matrix of the separated signal flow; extracting the modulation domain features and the statistical domain features of signals in the time-frequency distribution matrix; carrying out similarity measurement on the modulation domain features and the statistical domain features and a preset typical signal feature template to obtain the feature deviation degree of the separated signal flow; And carrying out feature fusion on the feature deviation degree and the power information of the signals to obtain the relative interference features of the multi-band antenna.
7. The method for suppressing signal interference of multi-band antenna as claimed in claim 6, wherein the calculation formula of the characteristic deviation is as follows: ; In the formula, For the degree of deviation of the features, Is a preset modulation domain weight factor which is a preset modulation domain weight factor, For the modulation domain eigenvalues in the time-frequency distribution matrix, For the modulation domain characteristics to be described, For the typical modulation domain feature theoretical values corresponding to the modulation domain feature values in the typical signal feature templates, For the statistical domain eigenvalues in the time-frequency distribution matrix, For typical modulation domain features in the typical signal feature template, For the characteristics of the statistical domain in question, For a typical statistical domain feature theory value corresponding to the statistical domain feature value in the typical signal feature template, For typical statistical domain features in the typical signal feature templates, Is a preset statistical domain weight factor which is used for the data processing, Is a preset power weight factor, which is a preset power weight factor, As an actual measurement of the power information, Is the typical power theoretical value in the typical signal characteristic template.
8. The method for suppressing signal interference of a multiband antenna according to claim 1, wherein the step of matching the relative interference characteristics with a preset interference characteristic library one by one and performing strategic reconstruction according to a matching result to obtain a suppression strategy of the multiband antenna comprises: Tensor synthesis is carried out on the relative interference characteristics to obtain feature vectors to be matched of the relative interference characteristics; Performing traversal comparison on the feature vector to be matched and a preset interference feature library to obtain a target interference feature record of the multi-band antenna; Performing instruction analysis on the target interference characteristic record to obtain a basic operation instruction of the multi-band antenna; And performing strategy adaptation on the basic operation instruction to obtain the inhibition strategy of the multi-band antenna.
9. The method for suppressing signal interference of a multiband antenna according to claim 1, wherein the performing vector synthesis on the band signal in the multi-source heterogeneous data in the multi-mode feed network based on the suppression policy to obtain a target synthesized signal of the multiband antenna includes: performing parameter decoding on the suppression strategy to obtain an amplitude adjustment instruction and a phase adjustment instruction of the multi-mode feed network; according to the amplitude adjustment instruction and the phase adjustment instruction, carrying out weighting coefficient configuration on a logic feed port in the multi-mode feed network to obtain an adjusted multi-mode feed network of the multi-band antenna; in the adjusted multi-mode feed network, carrying out beam forming on the frequency band signals of the multi-source heterogeneous data to obtain primary synthesized beams of the multi-band antenna; And carrying out power normalization on the primary synthesized wave beam to obtain a target synthesized signal of the multi-band antenna.
10. A multi-band antenna signal interference suppression system for implementing the multi-band antenna signal interference suppression method of claim 1, said system comprising: the data mapping module is used for mapping multi-source heterogeneous data acquired by the multi-band antenna into a multi-mode feed network of the multi-band antenna; The signal converging module is used for converging the multi-stream signals of the space electromagnetic signals of the multi-source heterogeneous data to obtain mixed signals of the multi-band antenna; the signal decoupling module is used for coupling the mixed signal to the multi-mode feed network and performing space-frequency joint domain decoupling on the mixed signal to obtain a separated signal stream of the multi-band antenna; The characteristic extraction module is used for deconstructing signal characteristics of the separated signal flow to obtain the relative interference characteristics of the multi-band antenna; The strategy generation module is used for matching the relative interference characteristics with a preset interference characteristic library one by one, and carrying out strategic reconstruction according to a matching result to obtain a suppression strategy of the multi-band antenna; and the signal synthesis module is used for vector synthesis of the frequency band signals in the multi-source heterogeneous data based on the suppression strategy in the multi-mode feed network to obtain the target synthesis signal of the multi-band antenna.

Description

Method and system for suppressing signal interference of multi-band antenna Technical Field The present invention relates to the field of multi-band antenna technologies, and in particular, to a method and a system for suppressing signal interference of a multi-band antenna. Background The multi-band antenna has the characteristics of covering a wide frequency domain and adapting to multi-scene communication requirements, and is widely applied to various wireless communication systems, but the problem of signal interference in a multi-band working mode always restricts the performance improvement. The existing interference suppression method focuses on signal processing in a single dimension, lacks collaborative optimization of a spatial domain and a frequency domain, faces to complex electromagnetic environment caused by multi-source heterogeneous data, and is difficult to realize deep decoupling of mixed signals, so that the separation precision of an interference signal and a target signal is insufficient, and the recognition accuracy of interference features is limited. Meanwhile, the traditional method does not fully consider the dynamic adaptation relation between the feed network and the signal characteristics, and amplitude phase distortion is easy to generate in the signal converging and synthesizing process, so that the difficulty of interference suppression is further increased. In the prior art, the correlation between interference feature matching and suppression strategy generation is weak, and a dynamic reconstruction mechanism based on feature difference is lacked, so that the suppression strategy is difficult to accurately adapt to interference signals with different types and different intensities. In addition, the traditional method depends on characteristic parameters of a single mode in the signal characteristic extraction stage, does not realize the deep fusion of a modulation domain, a statistical domain and power information, causes insufficient identification degree of interference characteristics, further influences the execution effect of a suppression strategy, and causes the problems of incomplete interference suppression, target signal distortion and the like, so that how to improve the signal interference suppression efficiency of the multi-band antenna becomes a problem to be solved urgently. Disclosure of Invention The invention provides a method and a system for suppressing signal interference of a multi-band antenna, which are used for solving the problems in the background technology. In order to achieve the above object, the present invention provides a method for suppressing signal interference of a multiband antenna, comprising: S1, mapping multi-source heterogeneous data acquired by a multi-band antenna into a multi-mode feed network of the multi-band antenna; s2, carrying out multi-stream signal aggregation on the space electromagnetic signals of the multi-source heterogeneous data to obtain mixed signals of the multi-band antenna; S3, coupling the mixed signal to the multi-mode feed network, and performing space-frequency joint domain decoupling on the mixed signal to obtain a separated signal stream of the multi-band antenna; S4, performing signal characteristic deconstructment on the separated signal flow to obtain the relative interference characteristics of the multi-band antenna; s5, matching the relative interference characteristics with a preset interference characteristic library one by one, and carrying out strategic reconstruction according to a matching result to obtain a suppression strategy of the multi-band antenna; S6, vector synthesis is carried out on the frequency band signals in the multi-source heterogeneous data based on the suppression strategy in the multi-mode feed network, and the target synthesized signals of the multi-band antenna are obtained. In a preferred embodiment, the multi-mode feed network mapping the multi-source heterogeneous data collected by the multi-band antenna to the multi-band antenna includes: Carrying out signal analysis on multi-source heterogeneous data acquired by a multi-band antenna to obtain pure signal flow of the multi-band antenna; Estimating the direction of arrival of the pure signal stream to obtain a main signal component of the multi-band antenna; distributing corresponding logic feed ports for the main signal components according to the array structure of the multi-band antenna; performing topology optimization on the initial connection relation between the logic feed ports to obtain a feed network prototype of the multi-band antenna; And carrying out iterative convergence on the excitation parameters of the logic feed port in the feed network prototype and the initial connection relation according to the power and phase relation of the signal components in the pure signal stream to obtain the multi-mode feed network of the multi-band antenna. In a preferred embodiment, the multi-stream signal aggregation