光传输系统中LDPC码的新颖随机构造方法
发布时间:2018-04-13 20:55
本文选题:光传输系统 + 随机构造方法 ; 参考:《半导体光电》2014年06期
【摘要】:分析光传输系统的传输特性与规则LDPC码的随机构造方法之后,提出LDPC码的一种新颖随机构造方法。基于该构造方法构造了一种新颖的码率为93.7%、冗余度为6.69%的规则SCG-LDPC(3969,3720)码,该规则LDPC码在将来的硬件实现中可相对地节省硬件存储空间和减少计算量。仿真分析表明:该新颖的SCG-LDPC(3969,3720)码在BER为10-8时,与同码率同冗余度的ITU-T G.975建议中RS(255,239)码和ITU-T G.975.1建议中LDPC(32640,30592)码相比,其净编码增益(NCG)和距离Shannon限都分别改善了约1.92dB和0.97dB。因而该规则LDPC码的纠错性能更为优越,更适用于光传输系统。
[Abstract]:After analyzing the transmission characteristics of optical transmission system and the random construction method of regular LDPC codes, a novel random construction method of LDPC codes is proposed.Based on this construction method, a novel regular SCG-LDPC code with a rate of 93.7and a redundancy of 6.69% is constructed. The rule LDPC code can save the storage space and reduce the computation cost in the future hardware implementation.Simulation results show that when the BER is 10-8, the new SCG-LDPC-3969N3720) code is better than the ITU-T G.975 recommendation with the same code rate and the LDPC3264040305992) code with the same rate and redundancy. The net coding gain and the distance Shannon limit of the new SCG-LDPC code are improved by about 0.97dBand 0.97dB. respectively.Therefore, the error-correcting performance of the regular LDPC codes is more superior and more suitable for optical transmission systems.
【作者单位】: 重庆邮电大学光纤通信技术重点实验室;
【基金】:国家自然科学基金项目(61371096,61275077,61003256) 2013年重庆邮电大学大学生科研训练计划项目(A2013-42) 重庆市自然科学基金项目(2010BB2409)
【分类号】:TN929.1;TN911.22
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本文编号:1746158
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