适用于卫星通信的速率自适应型LDPC译码器设计  

Rate Adaptive LDPC Decoder for Satellite Communication

作　　者：田瑞甫 刘聚 钟鸣 张朝路 侯俊 TIAN Ruifu;LIU Ju;ZHONG Ming;ZHANG Chaolu;HOU Jun(Shanghai Aerospace Electronics Technology Institute,Shanghai 201109,China)

机构地区：[1]上海航天电子技术研究所,上海201109

出　　处：《无线电工程》2019年第6期482-487,共6页Radio Engineering

基　　金：国家自然科学基金资助项目(61605110)

摘　　要：为满足卫星通信中多种速率数据自适应传输的需求,设计了一种速率自适应型低密度奇偶校验码(Low-Density Parity Check codes,LDPC)译码器。设计的译码器在实现修正最小和译码算法(Modified Min-Sum Algorithm,MMSA)基础上,通过对输入数据加填充帧和输出数据伴随有效性标记的方式,单一主时钟实现多种速率数据的译码运算,不需要时钟切换,简化了控制逻辑。测试结果表明,设计的译码器在误码率为1*10^(-7)量级有6.5 dB编码增益,且当译码速率不高于50 Mbps时具有速率自适应性。A rate adaptive Low-Density Parity Check codes (LDPC) decoder is designed to meet the need of multi-rate data adaptive transmission in satellite communication.On the basis of Modified Min-Sum Algorithm (MMSA) implementation,the LDPC decoder is designed to realize the decoding operation of multi-rate of a single master clock by adding the filling frame to the input data and the adjoint validity marker of the output data with no need for clock switching and simplified control logic.Test results show that the decoder has 6. 5 dB gain at the bit error rate of 1×10 ^-7.And it also has rate adaptability when the decoding rate is no higher than 50 Mbps.

关 键 词：卫星通信 速率自适应 低密度奇偶校验码 修正最小和译码算法 

分 类 号：TN911.22[电子电信—通信与信息系统]