LDPC信道编码技术在数据链系统中的应用研究

Research on Application of LDPC Channel Coding Technology in Dat a Link System

针对低时延、强抗干扰、高速传输等数据链系统应用场景的需求,本文提出基于低密度奇偶校验码(Low-Density Parity-Check,LDPC)的信道编码方案,并详细介绍了数据链系统中信道编码技术应用的现状以及LDPC码理论,研究了信道编码系统传输模型和最小和译码算法及其改进算法。最后,通过计算机仿真分析了不同译码算法和不同迭代次数下LDPC码的译码性能。结果表明,LDPC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。

A channel coding scheme based on low-density Parity-check(LDPC)was proposed to meet the requirements of data link system Application scenarios such as Low time delay,strong anti-interference and high-speed transmission.This paper introduces the Application status of channel coding technology in data link system and LDPC code theory in detail,and studies the transmission model and minimum sum decoding algorithm of channel coding system and its improved algorithm.The decoding performance of LDPC codes under different decoding algorithms and different iterations is analyzed by computer simulation.The results show that LDPC channel coding technology can obtain exce llent bit error performance at low SNR.