一种部分并行干扰对消因子的计算方法  

A CALCULATING METHOD FOR PARTIAL PARALLEL INTERFERENCE CANCELLATION FACTOR

作　　者：曾召华[1] 刘贵忠[1] 

机构地区：[1]西安交通大学信息与通信工程研究所,西安710049

出　　处：《电子与信息学报》2003年第4期562-566,共5页Journal of Electronics & Information Technology

基　　金：国家教育部高等学校博士学科点专项科研基金(No.2000069828);陕西省教委专项基金(No.01jk194)

摘　　要：在CDMA系统中,多用户检测是一种行之有效的方法。而具有部分干扰因子的并行干扰抵消检测器则是目前多用户检测技术中最简单、有效的接收机,但长期以来,部分干扰因子的确定大多根据实验,缺乏理论支持。该文在基于MMSE准则下,给出了一个两级PPIC接收机的部分干扰因子的计算公式。计算机仿真表明它具有良好的干扰消除能力,且对干扰信号功率和噪声估计偏差不敏感。Multiuser detection in Code-Division Multiple Acess(CDMA) system is an effective method. The Partial Parallel Interference Cancellation(PPIC) detector is considered as an effective yet simple receiver. However, the optimal cancellation level which is controlled by Partial Cancellation Factor(PCF) is usually determined by trial and error, since no theoretical values were reported. A multiuser receiver employing two-stage PPIC based on MMSE criteria is introduced in this paper. Computer simulation shows that the derived PCF is insensitive to the estimation bias of the noise level and the interfering signal power.

关 键 词：多用户检测 最小均方误差 并行干扰对消 对消因子 CDMA 

分 类 号：TN914.53[电子电信—通信与信息系统]