基于并行部分干扰对消检测的迭代多用户解码  

Iterative Multiuser Decoding Based on Parallel Partial Interference Cancellation Detection

作　　者：张爱萍[1] 罗汉文[1] 王豪行[1] 

机构地区：[1]上海交通大学电子工程系,上海200030

出　　处：《上海交通大学学报》2002年第9期1269-1272,1279,共5页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金 (60 0 72 0 2 8);教育部重点学科(A80 82 )资助项目

摘　　要：基于用户信息比特最大后验概率解码的因子图表示及和 -积算法 ,通过干扰估计值的渐进性能分析 ,提出了一种基于并行部分干扰对消检测的迭代多用户解码器 .多用户检测模块的基本结构类似于并行部分干扰对消检测 ,但干扰估计来自信道译码模块 ;同时 ,信道译码模块还提供干扰估计误差特性 ,多用户检测模块据此选取消除估计多址干扰的比例 .仿真结果表明 ,随着迭代次数的增加 。Based on the factor graph representation of maximum a posteriori probabilities decoding of the user information bits and the sum-product algorithm, an iterative multiuser decoding based on parallel partial interference cancellation detection for CDMA (code division multiple access) system was proposed. The structure of the multiuser detection is similar to the parallel partial interference cancellation detection, but the multiple access interference (MAI) estimation is from the channel decoding, and the proportion of the estimated MAI to be cancelled is chosen according to the error characteristic provided by the channel decoding. The simulation results show that the receiver offers the performance close to that of single user system with the increase of the iteration.

关 键 词：并行部分干扰对消检测 多用户检测 迭代多用户解码 干扰估计 信道译码模块 多址干扰 CDMA系统 

分 类 号：TN911.23[电子电信—通信与信息系统] TN914.53[电子电信—信息与通信工程]