Zigzag-Coded Modulation for High-Speed Fiber Optical Channels

被引:5
作者
Kahveci, Salim [1 ]
Gong, Chen [2 ]
Wang, Xiaodong [2 ]
机构
[1] Karadeniz Tech Univ, Dept Elect Elect Engn, TR-61080 Trabzon, Turkey
[2] Columbia Univ, Dept Elect Engn, New York, NY 10027 USA
关键词
Multi-level coding; Multi-stage decoding; Rate allocation; Zigzag codes; PARITY-CHECK CODES;
D O I
10.1364/JOCN.4.000382
中图分类号
TP3 [计算技术、计算机技术];
学科分类号
0812 ;
摘要
We propose new coded modulation schemes for ultra-high-speed optical transmission (e. g., 100 Gb/s and above) using component concatenated zigzag codes in combination with high-order digital modulation and coherent detection. In particular, we propose single-level coded modulation and multi-level coded modulation using concatenated zigzag codes. For single-level coded modulation, only one concatenated zigzag code is employed to encode the information bits, and Gray mapping is employed to map the coded bits to channel symbols. For multi-level coded modulation, the mapping bits are divided into several layers, and one component concatenated zigzag code is employed at each layer; the layers are decoded successively, and the decoded layers are used to assist the decoding of the subsequent layers. Furthermore, we propose a rate allocation scheme for the component concatenated zigzag codes and a parameter selection scheme for multi-level coded modulation. Simulation results demonstrate that single-level and multi-level coded systems with zigzag codes show up to 0.5 dB performance gain over structured low-density parity check codes.
引用
收藏
页码:382 / 391
页数:10
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