LDPC码在数据链系统中的性能仿真

Performance simulation of LDPC code in data link system

针对弹载数据链系统在复杂的电磁环境下高速稳定的数据传输需求,提出基于低密度奇偶校验码(Low-Density Parity-Check,LDPC)的信道编码方案,建立了LDPC码编码调制仿真系统模型。通过MATLAB仿真分析了编码时码长、码率参数和译码时不同迭代次数和修正参数等对LDPC码性能的影响,对LDPC码的不同译码方法进行了综合比较。结果表明,LDPC码信道编码技术可以在较低的信噪比条件下获得优异的误码性能。

Aiming at the high-speed and stable data transmission requirements of missile-borne data link system in complex electromagnetic environment,this paper proposes a channel coding scheme based on low-density parity check codes,and establishes a simulation system model of LDPC coding and modulation,The effects of code length,code rate parameters during encoding,different iterations and correction parameters during decoding on the performance of LDPC code are analyzed through MATLAB simulation.Based on the model,different decoding methods of LDPC code are compared.The results show that LDPC code channel coding technology can obtain excellent bit error performance under low signal-to-noise ratio.