VHF/UHF通信电台接收链路中的干扰抑制合并方法

doi:10.12305/j.issn.1001-506X.2022.03.34

Abstract

Abstract:

Considering the strong co-frequency interference in the receiving link of very high frequency/ultra high frequency(VHF/UHF) communication station with one transmitter and two receivers, aiming at the problem that the traditional anti-interference methods need to accurately estimate the channel parameters, a decision-based interference rejection combining (D-IRC) method is proposed. The relationship between the output signal to interference plus noise ratio (SINR) of D-IRC and the input SINR is quantitatively analyzed by analytical formulae, the interference suppression power failure area is defined, and the selection strategy of the optimal output of D-IRC is given. The simulation results show that under the scenario of unknown channel parameters, the decision output performance of the D-IRC method is better than the traditional interference rejection combining (IRC) and maximal ratio combining (MRC) methods, and the measurement relationship of failure zone is consistent with the theoretical analysis. The research results can provide a theoretical reference for the anti-jamming of VHF/UHF radio in the counter environment.

Key words: VHF/UHF radio, channel estimation, interference rejection combining (IRC), selection strategy

CLC Number:

TN911

Hao WU, Ying KANG, Songhu GE, Yaxing LI, Jin MENG. Interference rejection combining method in receive chain of VHF/UHF communication radio[J]. Systems Engineering and Electronics, 2022, 44(3): 1014-1021.

Figures/Tables 9

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References 32

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参数	数值
信道类型	Rayleigh衰落
多径数目	3
多径延时/μs	[0, 3, 6]
多径增益/dB	[0, -5, -10]
SNR/dB	20

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Interference rejection combining method in receive chain of VHF/UHF communication radio

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