Abstract: Frequency-hopping communication was combined with the Low-Density Parity-Check (LDPC) code to improve anti-jamming performance of frequency hopping communications. By simplifying the complexity of coding algorithm in the “greedy algorithm”, an offset layered quantization decoding called Layered Belief Propagation-Offset Min-Sum (LBP-OMS) algorithm was applied to improve the performance of error correction code words. The simulation results show that when certain frequency bands are covered by strong noise, the anti-interference ability of broadband frequency-hopping communications is improved by using the improved channel coding method.

Key words: frequency opping communication, broadband obstruction jamming, Low-Density Parity-Check (LDPC) code, greedy algorithm, Layered Belief Propagation Offset Min-Sum (LBP-OMS) algorithm

摘要： 为了提高跳频通信的抗干扰性能，将低密度奇偶校验(LDPC)码与跳频通信相结合。通过对编码算法中的“贪婪算法”的复杂度简化和带偏移量的分层量化译码(LBP-OMS)算法的应用，提高了码字的纠错性能。实验表明,当某些频带受强噪声干扰时，改进后的信道编译码方法提高了跳频通信的抗干扰能力。

关键词: 跳频通信, 宽带阻塞干扰, 低密度奇偶校验码, 贪婪算法, 带偏移量的分层量化译码算法