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Information Engineering Letters

Application of Nonbinary LDPC Codes about Serial Decoding Algorithm in Optical Fiber Communication

Zhongxun Wang, nglong Gao

Published Dec 1, 2013• 0 citations
Publisher
DOI
10.5729/iel.vol3.issue4.60

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TELKOMNIKA Indonesian Journal of Electrical Engineering•Dec 2, 2013•0 citations
This paper use serial BP decoding algorithm to decode nonbinary LDPC codes in order to reduce decoding latency in optical fiber communication system.Then we introduce the serial BP decoding algorithm for nonbinary LDPC codes and the simulation model of optical communication system in detail.After that we show the performance effect of the maximum iterations of serial BP decoding algorithm in LDPC decoder and compare the performance of the decoder with traditional BP decoding algorithm and serial BP decoding algorithm.The result indicates that serial BP decoding algorithm can really increase the convergence speed of LDPC decoder.
Abstract: In this paper, we perform an analysis on the min-max decoding algorithm for nonbinary LDPC (lowdensity parity-check) codes and propose serial min-max decoding algorithm. After that, combining with the weighted processing of the variable node message, we propose serial min-max decoding algorithm based on variable weighting for nonbinary LDPC codes. In the end, we perform a detailed analysis on the features of optical communication and show the simulation model in optical communication system. The simulation indicates that when the bit error rate is 10-3 and used in optical communication, compared with serial min-max decoding algorithm, traditional min-max decoding algorithm and traditional min-sum algorithm, serial min-max decoding algorithm based on variable weighting can offer additional coding gain 0.2 dB, 0.3 dB and 0.4 dB respectively in (AWGN) additional white Gaussian noise channel and under (OOK) on-off keying modulation. Copyright © 2013 IFSA.
In this paper, we perform an analysis on the min-max decoding algorithm for nonbinary LDPC (low-density parity-check) codes and propose serial min-max decoding algorithm. Combining with the weighted processing of the variable node message, we propose serial min-max decoding algorithm based on variable weighting for nonbinary LDPC codes in the end. The simulation indicates that when the bit error rate is 10^-3, compared with serial min-max decoding algorithm, traditional min-max decoding algorithm and traditional minsum algorithm, serial min-max decoding algorithm based on variable weighting can offer additional coding gain 0.2dB、0.8dB and 1.4dB respectively in additional white Gaussian noise channel and under binary phase shift keying modulation.