Block Markov superposition transmission with pulse position modulation over free-space optical links  

作　　者：Jinshun Zhu Shancheng Zhao Xiao Ma 

机构地区：[1]School of Electronics and Information Technology,Sun Yat-sen University,Guangzhou 510006,China [2]College of Information Science and Technology,Jinan University,Guangzhou 510632,China [3]School of Data and Computer Science,Sun Yat-sen University,Guangzhou 510006,China [4]Guangdong Key Laboratory of Information Security Technology,Sun Yat-sen University,Guangzhou 510006,China

出　　处：《Journal of Communications and Information Networks》2017年第4期142-150,共9页通信与信息网络学报（英文）

基　　金：supported by the Basic Research Project of Guangdong Provincial Natural Science Foundation(No.2016A030308008);the National Natural Science Foundation of China(Nos.91438101 and 61501206);the National Basic Research Program of China(“973”Program)(No.2012CB316100)。

摘　　要：In FSO(Free-Space Optical)communications,performance of the communication systems is severely degraded by atmospheric turbulence.PPM(Pulse Position Modulation)is widely used in FSO communication systems owing to its high power efficiency.In this paper,we present a combination of the BMST(Block Markov Superposition Transmission)technique and the PPM scheme to improve the reliability of the transmission over FSO links.Based on analyzing an equivalent system,a lower bound on the bit-error-rate of the proposed scheme is presented.Extensive simulations are performed which show that the BMST-PPM system performs well under a wide range of turbulence conditions and improves the performance of the basic code.Simulation results also show that,the performance of the system with the sliding-window detection/decoding algorithm matches well with the lower bound in the low-error-rate region.

关 键 词：BMST FSO gamma-gamma channel model iterative detection/decoding algorithm PPM 

分 类 号：TN9[电子电信—信息与通信工程]