LT码的远程光纤通信系统性能研究  

The performance of remote fiber communication system based on LT codes

作　　者：邵鸿翔[1,2] 高宏峰[1] 

机构地区：[1]河南科技大学电子信息工程学院,河南洛阳471023 [2]洛阳理工学院工程训练中心,河南洛阳471023

出　　处：《安徽大学学报（自然科学版）》2014年第2期68-73,共6页Journal of Anhui University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(61101167);国家航空科学基金资助项目(20110142002)

摘　　要：针对传统前向纠错码在光纤通信系统中不能根据信道状况自动调整码率和常用光纤信道模型不准确的问题,提出基于码率可调LT码的非对称卡方噪声分布的光纤通信系统.在此基础上,针对LT码编码度1断层和生成矩阵中短环影响译码的问题,设计基于指数健壮度分布的去4环的联合编码算法.仿真结果表明,该文算法相比鲁棒孤波度分布译码算法效果有所提高,在收包数量一定的前提下,提高了译码成功率;同时LT码在卡方信道模型下的编译码性能优于其他信道.Since the forward error correction code in the optical fiber communication system was a fixed code,which could not be automatically adjusted according to the channel condition.The authors designed a fiber communication model system of asymmetric x2 noise distribution based on LT code.On this basis,a new coding of robust exponential distribution with avoiding 4-loop was proposed to solve the decoding problem of degree 1 chasm and generator matrix short loop.Simulation results showed that the new coding improved the decoding performance and the performance of LT code in x2 channel model outperformed other channel.

关 键 词：LT码 编码度分布 去4环 BP译码 卡方光纤信道模型 

分 类 号：TN913.7[电子电信—通信与信息系统]