低密度奇偶校验码在激光对潜通信系统中的应用研究  

Research on low density parity check code applied in submarine laser communication system

作　　者：李海燕[1] 吕俊伟[1] 何友金[1] 

机构地区：[1]海军航空工程学院控制工程系,山东烟台264001

出　　处：《激光与红外》2010年第12期1298-1301,共4页Laser & Infrared

基　　金：海军航空工程学院青年基金项目(No.HYQN201008)资助

摘　　要：激光对潜通信系统光信道对光信号衰减极大,致使系统误码率增加,严重影响了通信系统的性能。因此必须采用具有极强纠错能力的差错控制编码技术来提高数据传输的可靠性,获得良好的通信效果。低密度奇偶校验码(LDPC码)是目前已知的距离Shannon限最近的纠错码。首先介绍了激光对潜通信系统的组成,然后分析了LDPC码的编译原理,最后仿真验证了在激光对潜通信系统中LDPC码的性能。结果表明LDPC码降低了系统误码率,改善了系统性能。The severe attenuation of the optical signal in laser-submarine communication increases the BER and highly influences the system performance.So the capacity of the error-correcting code must be good enough to improve the data reliability and make better communication effect.Low Density Parity Check（LDPC） code′s rates are extremely near to the Shannon limit.The composition of laser-submarine communication system is introduced firstly in this paper,and then the compiling principle of LDPC code is analyzed.By simulation,the capability of LDPC code is validated in laser-submarine communication system.The results proved that the LDPC code can decrease the system′s BER and can improve the system performance remarkably.

关 键 词：激光对潜通信 LDPC码 误码率 

分 类 号：TN929.1[电子电信—通信与信息系统]