Low-density parity-check code for high-speed fibre-optic communication and its experimental verification

作     者：Xu, B. Xie, J. 

作者机构：Univ Elect Sci & Technol China Key Lab BroadBand Opt Fibre Transmiss & Commun Ne Minist Educ Chengdu 610054 Peoples R China 

出 版 物：《IET COMMUNICATIONS》 (IET Commun.)

年 卷 期：2010年第4卷第10期

页      面：1247-1252页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 

基　　金：Natural Science Foundation of China 

主　　题：parity check codes forward error correction code LDPC decoding optical fibre communication high-speed fibre-optic communication systems RS code Codes sampling phase Q-factor improvement fibre optic communication channel estimation Optical communication decoding quantisation (signal) high quantisation resolution error correction codes low-density parity-check code soft-decoding Communication channel equalisation and identification LDPC code quasi-cyclic structure Other topics in statistics 

摘      要：Although low-density parity-check (LDPC) code has been proved as a powerful forward error correction code for fibre optic communication, its soft-decoding requires high quantisation resolution which is difficult to achieve for high-speed fibre-optic communication systems. A modi. cation to LDPC decoding algorithms is proposed to effectively improve the performance at quantisation resolution as low as two-bit or one-bit. The good decoding performance of LDPC code for error correction is confirmed by experiment. Compared with the RS(255, 239) code commonly used in optical fibre communication, a Q-factor improvement of 2-dB is obtained in the experiment for an LDPC code with quasi-cyclic structure at the same redundancy as the RS code. Furthermore, the impacts of sampling phase and channel estimation using real data over the decoding performance are analysed.