跳频抗干扰通信系统中LDPC码的编码优化设计

doi:10.12305/j.issn.1001-506X.2022.11.31

Abstract

Abstract:

To improve the anti-jamming ability of low-density parity-check (LDPC) coding frequency hopping (FH) communication system, a construction method of LDPC coding against the partial band noise jamming patterns is proposed. Firstly, the degree distribution sequence of the LDPC codes in the interference environment is optimized for different interference factor parameters. Then, the progress edge growth and the approximate cycle extrinsic message algorithm are combined to construct the basis matrix. Finally, the improved partial partition shift coefficient matrix is used to expand to obtain the check matrix, combining the unequal error protection feature applied to the interference protection of information bits. This construction method takes into account both the optimized degree distribution and quasi-cyclic structure. The simulation results show that the constructed code has good performance. Under the same conditions, the anti-interference performance is better than that of the current mainstream codewords.

Key words: frequency hopping (FH), partial band noise jamming, low-density parity-check (LDPC), coding design, degree distribution optimization

CLC Number:

TN911.22

Renzhi WANG, Kegang PAN, Ruixiang ZHAO. Optimal design of LDPC codes in frequency hopping anti-jamming communication system[J]. Systems Engineering and Electronics, 2022, 44(11): 3548-3555.

Figures/Tables 8

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References 31

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参数	干扰因子ρ
参数	1.0	0.5	0.6	0.7	0.8	0.9
λ₂	0.281 0	0.311 3	0.281 3	0.277 6	0.260 4	0.249 8
λ₃	0.302 6	0.236 0	0.299 8	0.277 6	0.302 8	0.314 5
λ₄	-	0.054 7	-	0.037 7	0.005 7	-
λ₅	-	-	-	-	0.004 6	-
λ₇	-	-	0.006 2	-	-	-
λ₈	0.009 6	-	-	-	-	-
λ₉	-	-	-	-	-	0.001 5
λ₁₀	0.406 8	0.398 0	0.412 7	0.407 1	0.426 5	0.434 2
μ₆	-	0.043 6	-	-	-	-
μ₇	0.930 4	0.956 4	0.916 9	0.881 4	0.731 6	0.653 0
μ₈	0.069 6	-	0.083 1	0.118 6	0.268 4	0.347 0
译码门限值/dB	-9.011 3	-2.816 7	-0.915 8	0.010 5	0.553 8	0.897 6

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Optimal design of LDPC codes in frequency hopping anti-jamming communication system

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