On Analyzing Quasi-Cyclic LDPC Codes Over Modified Welch-Costas-Coded Optical CDMA System

被引：7
|
作者：
Huang, Jen-Fa [1 ]
Yang, Chao-Chin [2 ]
Huang, Chun-Ming [1 ]
机构：
[1] Natl Cheng Kung Univ, Dept Elect Engn, Tainan 70146, Taiwan
[2] Kun Shan Univ, Dept Elect Engn, Yung Kang 710, Tainan Hsien, Taiwan
来源：
JOURNAL OF LIGHTWAVE TECHNOLOGY | 2009年 / 27卷 / 12期
关键词：
Low-density parity-check (LDPC) code; modified Welch-Costas (MWC) code; optical code division multiple access (OCDMA); spectral amplitude coding (SAC); PARITY-CHECK CODES; COMMUNICATION-SYSTEMS; ERROR-CORRECTION; PERFORMANCE; MATRICES; BLOCK;
D O I：
10.1109/JLT.2008.2009548
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A modified Welch-Costas (MWC) code family for the spectral-amplitude-coding (SAC) optical code-division multiple-access (OCDMA) system is proposed. On utilizing the property of the MWC codes, more compact coder/decoders can be realized via waveguide and fiber gratings. This system has a superior performance as compared to the previous Walsh-Hadamard-coded OCDMA system. In addition, we propose a new class of quasi-cyclic low-density parity-check (QC-LDPC) codes to improve the transmission performance over the MWC-coded OCDMA system when the data rate is high. Simulation results show that the coding gain of the proposed QC-LDPC codes is larger than that of the Reed-Solomon codes, and the performance of the MWC-coded OCDMA system can be greatly improved by these QC-LDPC codes when data rate is 2.5 Gb/s.
引用
收藏
页码：2150 / 2158
页数：9
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