空间激光通信中基于原模图的LDPC码构造方法  

Construction method of LDPC codes for space optical communications based on protograph

作　　者：章谦骅[1] 章坚武[1] 包建荣[1] 

机构地区：[1]杭州电子科技大学通信工程学院,杭州310018

出　　处：《光通信技术》2014年第8期54-56,共3页Optical Communication Technology

基　　金：国家自然科学基金(61001133;61102066)资助

摘　　要：研究了空间激光通信系统中的信道编码算法,基于原模图和准循环扩展,提出了一种性能优异的低密度奇偶校验(LDPC)码构造方法,可以满足光通信系统中的高速编译码需求。仿真结果表明,构造的LDPC码纠错性能强,在误码率(BER)为10-9数量级处仍未出现误码平底,适合长距离空间激光通信系统。The paper researchs the channel code algorithm in the space optical communication system, a construction method of low density parity check （LDPC） codes with excellent performance is proposed based on protograph and quasi cyclic expansion, which can be applied in high speed encoding and decoding in the space optical communication system. Simulation shows that the LDPC codes have superior error correction performance and no sign of error floor when the BER is 10^-9, which are suitable for the long distance space optical communication systems.

关 键 词：空间激光通信 原模图 准循环扩展 误码平底 

分 类 号：TN929.11[电子电信—通信与信息系统]