使用准循环LDPC码的OFDM系统性能分析  

Performance Analysis of OFDM System Coded by QC-LDPC

作　　者：朱磊基[1] 汪涵[1] 施玉松[1] 邢涛[1,2] 王营冠[1,3] 

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 [2]无锡物联网产业研究院,江苏无锡214135 [3]中国科学院嘉兴无线传感网工程中心,浙江嘉兴314006

出　　处：《现代电子技术》2011年第21期49-50,54,共3页Modern Electronics Technique

基　　金：新一代宽带无线移动通信网国家科技重大专项(2009ZX03006-004);江苏省无锡市科技局政产学研合作计划项目(CYWL0906)

摘　　要：参照IEEE 802.16e标准中的准循环LDPC码校验矩阵结构,设计了一种新的校验矩阵,并将其应用于OFDM系统中。同时,将该设计方案与RS和卷积编码级联方案进行比较,仿真显示,该方案与级联编码方案有几乎相同的编码增益。OFDM调制之前采用BPSK映射比采用QPSK映射有2dB的增益。出于对比的目的,在BPSK调制模式下,对该设计方案与级联编码方案也做了仿真比较,结果显示,前者比后者有大约3dB的编码增益。Referring to the parity check matrix structure of Quasi Cycle LDPC code in IEEE 802.16e, a new parity check matrix was designed and was applied to OFDM system. Comparing the design scheme with concatenated code scheme which was constructed by RS and convolution code, the simulation results show that the design and the concatenated code have almost the same coding gain. Using BPSK before OFDM modulation can have 2 dB more gain than the condition of using QPSK. For the purpose of comparison, under BPSK modulation, a simulated comparison between the design scheme and concatenated code is performed, and results show that the design has almost 3 dB gain than concatenated code.

关 键 词：IEEE 802.16e 准循环LDPC OFDM RS编码 卷积编码 

分 类 号：TN911-34[电子电信—通信与信息系统]