Abstract: Aiming at the problem that different frequency hopping points may have different SNR values in frequency hopping anti-jamming communication, this paper designs a method for SNR accurate estimate according to the self-correlation function value of Barker codes. The channel decoding performance is improved with channel encoding error-correcting by using Low Density Parity-check Codes(LDPC) codes. When some frequency hopping points encounter bad noise, erasure-correct processing is done directly, and the anti-jamming performance of system is improved.

Key words: frequency hopping communication, Low Density Parity-check Codes(LDPC), SNR estimate, Barker code

摘要： 针对跳频抗干扰通信中不同跳频点上信噪比可能不一致的问题，根据巴克码自相关函数值的大小设计一种可以准确估计信噪比的方法。结合低密度奇偶校验码进行信道编码纠错，提高了信道译码性能。当某些跳频点受强噪声干扰时，直接进行纠删处理，提高系统抗干扰能力。

关键词: 跳频通信, 低密度奇偶校验码, 信噪比估计, 巴克码

CLC Number: 

• TN911.22