基于扩域分组的多码率QC-LDPC码设计  

Design of multi-code rate QC-LDPC based on extension field grouping

作　　者：朱磊基[1] 汪涵[1] 施玉松[1] 邢涛[1] 王营冠[1] 

机构地区：[1]中国科学院上海微系统与信息技术研究所,上海200050

出　　处：《现代电子技术》2012年第3期126-128,共3页Modern Electronics Technique

基　　金：国家重大科技专项(2009ZX03006-003-01)

摘　　要：分析了伽罗华域的一些基本性质,同时,给出了准循环低密度奇偶校验码的基本构造思路与方法。在此基础之上,提出了基于伽罗华域扩域分组方法构造多码率QC-LDPC码的方法。通过对扩展域中线性独立的元素的分组,可以很容易地实现不同码率QC-LDPC码的构造。仿真显示,提出的方法在10-5误码率条件下,与基于大衍数列构造的QC-LDPC码性能接近,有0.1dB的差距,但是,与基于斐波那契构造的QC-LDPC码相比,有0.8dB的增益。与IEEE 802.16e构造的QC-LDPC码相比,提出的方法有1dB的差距,还有很大的改进空间。Some basic characteristics of Galois Field are analyzed. At the same time, some basic methods for constructing Quasi Cycle Low Density Parity Check （QC-LDPC） codes are presented. A method of constructing QC-LDPC codes based on Grouping of Galois Fieldrs Extension Field can be realized. By grouping Galois Extension Fieldrs linear independent elements, the QC-LDPC codes with different rates can be easily constructed. Simulation results show that under 10-5 BER, our method has almost the same performance as codes constructed based on dayan sequence, the latter has 0.1 dB more gain than the for- mer. Compared with codes constructed based on Fibonacci sequence, our method has 0.8 dB more gain. Our method has 1 dB gain less than the method proposed by IEEE802.16e standard. It still has large space to improve the method.

关 键 词：扩域 分组 准循环 低密度校验码 

分 类 号：TN76-34[电子电信—电路与系统]