可变码长串行级联码的激光通信系统设计
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摘要
针对自由空间光通信易受大气环境的干扰和影响以及不同业务对编码长度的不同需求,提出了一种可变码长串行级联码的光通信方案,设计了一套基于现场可编程门阵列(FPGA)为编译码处理核心的大气激光通信系统,并对系统进行了外场测试,验证了其可行性。
Aiming at the interference and influence of free-space optical communication on the atmospheric environment and the different requirements of coding length for different services, an optical communication scheme with variable code length serial concatenated code is proposed. An atmospheric laser communication system based on field programmable gate array(FPGA) as the core of coding and decoding processing is designed, and the feasibility of the system is verified by field test..
Aiming at the interference and influence of free-space optical communication on the atmospheric environment and the different requirements of coding length for different services, an optical communication scheme with variable code length serial concatenated code is proposed. An atmospheric laser communication system based on field programmable gate array(FPGA) as the core of coding and decoding processing is designed, and the feasibility of the system is verified by field test..
引文
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[8]GAGLIARDI R,ROBBINS J,TAYLOR H.Acquisition sequences in ppm communications[J].IEEE Transactions on Information Theory,1987,33(5):738-744.
[2]李皓.深空光通信中的SCPPM编码性能研究[D].哈尔滨:哈尔滨工业大学,2012.
[3]MOISION B,HAMKINS J.Deep-space optical communications downlink budget:modulation and coding[J].IPN Progress Report,2003,42(154):1-28.
[4]朱乐君,张江鑫.基于FPGA的无线光通信PPM调制系统的设计[J].光通信技术,2006,30(12):57-59.
[5]3GPP technical specification groups.GSM/EDGE channel coding:3GPP TS 45.003 v14.2.0[S].Lucioles:3GPP Mobile Competence Centre,2017.
[6]MOISION B,HAMKINS J.Coded modulation for the deep-space optical channel:serially concatenated pulse position modulation[J].The Interplanetary Network Progress Report,2005,42(161):1-25.
[7]赵宏宇.Turbo编译码系统高效MAP译码,无数据辅助SNR估计与多项式交织器设计[D].成都:西南交通大学,2011.
[8]GAGLIARDI R,ROBBINS J,TAYLOR H.Acquisition sequences in ppm communications[J].IEEE Transactions on Information Theory,1987,33(5):738-744.