A parallel interference elimination method and system for multi-mode measurement and control signals
An interference elimination and signal technology, which is applied in the field of aerospace measurement and control communication, and can solve problems such as large differences in cross-correlation performance, records, and complex interference types.
Active Publication Date: 2019-12-10
ACAD OF OPTO ELECTRONICS CHINESE ACAD OF SCI
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Problems solved by technology
However, in multi-mode integrated receivers, the mutual interference between multi-mode measurement and control signals can be manifested as off-site interference, broadband interference, and narrow-band interference according to different signal forms. The types of interference are complex, and the mutual correlation performance is different. Larger, need specific analysis according to the specific signal form
[0005] Therefore, it is necessary to adapt the existing interference classification method according to the difference in cross-correlation characteristics between the signal spectrums, so as to further optimize the performance of the parallel interference cancellation algorithm. At present, there is no relevant method recorded in published papers or patent
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[0039] The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0040] In the present invention, the multi-mode receiver is used to receive the multi-mode measurement and control signal. When receiving the signal, because it is a multi-mode receiver, multiple signals coexist and are received by the receiving antenna at the same time, and the summation becomes a combined signal. Therefore, the multi-mode measurement and control signal includes different branches, and each branch signal corresponds to a transmission signal with different modulation and different applications.
[0041] The receiving channel of the multi-mode receiver is a software and hardware channel configured at the receiving end, which is used to separately receive / demodulate / synchronize the above-mentioned signals of different modulations and different applications. Each receiving channel matches one of the branch signals, for example, the i-th recei...
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The invention discloses a parallel interference cancellation method and system for multi-mode measurement and control signals. The method comprises: calculating spectral separation coefficients of anytwo branch signals among multi-mode measurement and control signals; during each stage of iteration, carrying out parameter estimation on all branch signals, reconstructing all branch signals based on parameter estimation results, and calculating a weighted carrier-to-noise ratio between the two branches of each stage; and selecting a gating signal based on the weighted carrier-to-noise ratio andsubtracting a reconstruction signal of a gating branch from received signals received by a multi-mode measurement and control signal receiver based on the gating signal, thereby obtaining the outputof the stage of iteration after interference cancellation; and repeating the iteration process until reaching a set number of iteration, and using the output after final interference cancellation as an interference cancellation result. According to the invention, the carrier-to-noise ratio is weighted by using the g spectral separation coefficients of the multi-mode measurement and control signalsand thus stage division and interference cancellation are carried out on the interference signals by using the weighted carrier-to-noise ratio. Therefore, the correlation difference of spectrums of the multi-mode measurement and control signals can be fully utilized.
Description
technical field [0001] The invention relates to the technical field of aerospace measurement and control communication, in particular to a method and system for eliminating parallel interference of multi-mode measurement and control signals. Background technique [0002] According to the requirements of different aerospace missions, the aerospace measurement and control system needs to complete various functions such as measurement, data transmission and navigation on the basis of conventional measurement and control functions. However, due to the shortage of spectrum resources and the sharing of the same antenna, the signals of multiple modulation systems coexist, and the spectrum intervals between each other are relatively close, and there are even spectrum overlaps, which will cause mutual interference in detection, synchronization, and data demodulation. interference. [0003] For mutual interference signals, the main anti-interference algorithms include subspace projec...
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IPC IPC(8): H04B1/10
CPCH04B1/1027
Inventor 徐颖申宇瑶罗瑞丹葛建袁超史雨薇刘文学田向伟梁丹丹唐阳阳
Owner ACAD OF OPTO ELECTRONICS CHINESE ACAD OF SCI