Chinese Optics Letters, Volume. 13, Issue s1, S10601(2015)
Performance analysis of LDPC code based on Watermark scheme in high-speed optical communication system
We study the decoding performance of low-density parity-check (LDPC) code based on Watermark scheme under different percentages of water-mark bits over 100 Gb/s differential quadrature phase shift keying (DQPSK) high-speed optical communication system. We also find the optimum percentage of water-mark bits according to the performance comparison. Simulation result shows an improvement of 0.5 dB net code gain by using the optimum Watermark scheme at a post-forward error correction bit error rate (BER) of 10-9, comparing with the traditional log-likelihood ratios belief propagation decoding algorithm. Also, for the same BER, there is a decrease in the number of iterations used in LDPC decoding.
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Wenxue He, Wenbo Zhang, Chao Li, Lixia Xi, Xiaoguang Zhang, Yaojun Qiao. Performance analysis of LDPC code based on Watermark scheme in high-speed optical communication system[J]. Chinese Optics Letters, 2015, 13(s1): S10601
Category: Fiber Optics and Optical Communications
Received: Apr. 14, 2014
Accepted: Jul. 16, 2014
Published Online: Jan. 27, 2015
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