Research on the transmission performance of turbo codes in DDO-OFDM system  

作　　者：童峥嵘 胡桂彬 曹晔 张卫华 

机构地区：[1]Key Laboratory of Film Electronics and Communication Devices and Key Laboratory of Intelligent Computing and Novel Software Technology, Tianjin University of Technology

出　　处：《Optoelectronics Letters》2015年第2期134-136,共3页光电子快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.61107052);the Tianjin Natural Science Foundation of China(No.11JCYBJC0010);the Tianjin Youth Foundation of China(No.13JCQNJC01800)

摘　　要：A direct detection optical orthogonal frequency division multiplexing(DDO-OFDM)system using turbo codes is built,and the transmission performance comparison between coded system and uncoded system is analyzed.Three decoding algorithms,which are Log-maximum a posteriori(MAP),Max-Log-MAP and threshold Max-Log-MAP,are used in the turbo coded system.By comparing three decoding algorithms,the system using Max-Log-MAP algorithm has the best bit error rate(BER)performance.At the transmission distance of 240 km,the uncoded system with transmission rate of 30 Gbit/s can get the BER performance at the degree of 8.93×10-3 with optical signal to noise ratio(OSNR)of24 d B,while the turbo coded system with transmission rate of 50 Gbit/s can achieve it within OSNR of 20 d B.

关 键 词：Bit error rate DECODING Error statistics Frequency division multiplexing Optical communication Optical signal processing Signal to noise ratio Turbo codes 

分 类 号：TN929.1[电子电信—通信与信息系统]