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

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 th...

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Bibliographic Details
Published inOptoelectronics letters Vol. 11; no. 2; pp. 134 - 136
Main Author 童峥嵘 胡桂彬 曹晔 张卫华
Format Journal Article
LanguageEnglish
Published Heidelberg Tianjin University of Technology 01.03.2015
Subjects
BER性能
Lasers
MAP算法
OFDM系统
Optical Devices
Optics
Photonics
Physics
Physics and Astronomy
Turbo码
传输性能
正交频分复用
编码系统
Orthogonal Frequency Division Multiplex
Decode Algorithm
Turbo Code
Transmission Distance
Orthogonal Frequency Division Multiplex System
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ISSN1673-1905
1993-5013
DOI10.1007/s11801-015-4210-3

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Summary: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） of 24 dB, while the turbo coded system with transmission rate of 50 Gbit/s can achieve it within OSNR of 20 dB.
Bibliography: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） of 24 dB, while the turbo coded system with transmission rate of 50 Gbit/s can achieve it within OSNR of 20 dB.
12-1370/TN
TONG Zheng-rong , HU Gui-bin, CAO Ye, ZHANG Wei-hua （ Key Laboratory of Film Electronics and Communication Devices and Key Laboratory of Intelligent Computing and Novel Software Technology, Tianjin University of Technology, Tianjin 300384, China）
ISSN:1673-1905
1993-5013
DOI:10.1007/s11801-015-4210-3