基于LDPC码的WCDMA下行链路性能仿真  

Simulation of LDPC Codes over WCDMA Downlink Channels

作　　者：徐位凯[1] 王琳[1] 

机构地区：[1]厦门大学通信工程系,厦门361005

出　　处：《系统仿真学报》2007年第8期1833-1835,1862,共4页Journal of System Simulation

基　　金：教育部新世纪优秀人才计划(NCET-04-0601);福建省科技重点项目(2006H0039)。

摘　　要：LDPC码是一类靠近Shannon限的高效信道编码,在AWGN信道下具有非常优越的性能。在讨论了LDPC码的基本原理之后,构建了基于LDPC码的WCDMA下行链路,改进了LDPC码的译码过程。仿真结果表明,在高速传输速率下(384kbit/s),不规则LDPC码具有优于Turbo码的性能,这对于LDPC码应用到复杂无线通信系统中具有重要意义。LDPC codes, which have good performances over AWGN channel, are the efficiently channel coding of near Shannon limits, After describing dements of LDPC codes, LDPC coded WCDMA downlinks were constructed, meanwhile, decoding process was improved. In high rate condition （384kbit/s）, simulating results show that performances of irregular-LDPC codes are than that of Turbo codes, It is important value for LDPC coding in complex wireless communication systems.

关 键 词：LDPC码 TURBO码 信度传播 WCDMA下行链路 

分 类 号：TN911.22[电子电信—通信与信息系统]