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- W2391015975 abstract "The performance of nonbinary low-density parity-check(LDPC)codes is obviously better than that of binary LDPC codes with the same bit length,but nonbinary LDPC codes have relatively high implementation complexity.In order to reduce the implementation complexity of nonbinary LDPC codes and improve the coding gain of the system,this paper adopts permutation polynomial method in order to improve the general nonbinary quasi-cyclic LDPC(QC-LDPC)codes.And the improved nonbinary QC-LDPC codes are then applied to coherent optical orthogonal frequency division multiplexing system with polarization division multiplexing(PDM-CO-OFDM)to study the transmission performance of PDM-COOFDM system in detail.According to the simulation results,we can find that the system based on GF(4)QC-LDPC encoding is obviously better than that employing corresponding binary QC-LDPC codes.And compared with the system encoded by general GF(4)QC-LDPC codes,the system encoded by improved GF(4)QC-LDPC codes has error performance improvement over 0.65 dB,spectral efficiency improvement of 2.16bit/s/Hz and has the improvement obviously in inhibition of the channel dispersion ability and implementation complexity.Therefore,nonbinary QC-LDPC codes constructed by the method based on permutation polynomial have broad application prospects in optical fiber communication systems." @default.
- W2391015975 created "2016-06-24" @default.
- W2391015975 creator A5010870597 @default.
- W2391015975 date "2015-01-01" @default.
- W2391015975 modified "2023-09-27" @default.
- W2391015975 title "Improved nonbinary QC-LDPC code construction for PDM-COOFDM system" @default.
- W2391015975 hasPublicationYear "2015" @default.
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