LDPC-RS级联码在地空宽带数据链中的应用  

Application of Concatenated LDPC-RS Codes in Broadband Ground-to-air Data Link

作　　者：朱良彬[1] 杜丹 张婉萍 ZHU Liangbin;DU Dan;ZHANG Wanping(The 54th Research Institute of CETC,Shijiazhuang 050081,China;Military Representative Office in Shijiazhuang Region,Military Representative Bureau of Army in Beijing, Shijiazhuang 050081,China)

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081 [2]陆军北京军代局驻石家庄地区军代室,河北石家庄050081

出　　处：《无线电工程》2019年第4期347-350,共4页Radio Engineering

基　　金：十三五装备预研共用技术领域基金资助项目(61403110201)

摘　　要：无人机地空宽带数据链常采用RS卷积级联码或低密度奇偶校验码(LDPC)的信道纠错编码方式。随着传输容量需求的快速增长,无人机地空宽带数据链系统面临带宽受限的严重压力,而且数据在传输过程中容易受多径衰落的影响。针对RS卷积级联码传输效率低和LDPC码受多径衰落影响大的问题,提出了一种LDPC-RS级联码加数据交织的数据传输方案,LDPC作为内码、RS作为外码使用,内外码之间通过数据交织解决多经衰落的影响。仿真结果表明,该方案保留了RS卷积级联码和LDPC码各自的优点,提高了地空宽带数据链数据传输质量。The concatenated RS-convolutional codes and the low-density parity-check codes (LDPC) are often used in the broadband ground-to-air data link of UAV.With the increasing needs of transmission capacity,the broadband ground-to-air data link of UAV faces the limit of its bandwidth.In addition,the data is often influenced by the multipath fading.Aiming at the problems that the concatenated RS-convolutional codes have low coding efficiency and the LDPC codes is liable to influence by the multipath fading,the paper presents a error-correcting code scheme using concatenated LDPC-RS code plus data interleave,the LDPC is used as inner code and the RS is used as outer code,the influence due to the multipath fading is reduced by data interleave.A simulation is done to validate its performance,and the results demonstrate that the concatenated LDPC-RS codes preserves the good qualities of LDPC and the concatenated RS-convolutional codes,and greatly improves the BER performance under multipath fading channel.

关 键 词：数据链路 多径衰落 低密度奇偶校验码 级联编码 

分 类 号：TN911.2[电子电信—通信与信息系统]