A Novel Stochastic Blind Adaptive Multiuser Detector for CDMA Systems  

作　　者：吕平宝 XieJianying YinZhiming 

机构地区：[1]SchoolofElectronicsandInformation,ShanghaiJiaotongUniversity,Shanghai200030,P.R.China

出　　处：《High Technology Letters》2003年第2期61-64,共4页高技术通讯（英文版）

基　　金：SupportedbytheHighTechnologyResearchandDevelopmentProgrammeofChina

摘　　要：Blind adaptive multiuser detector has become a research hotspot in recent years due to a number of advantages, but many blind adaptive algorithms involve low convergence rate. This paper presents a novel stochastic blind adaptive multiuser detector without requiring training sequences, which needs only two system parameters: the signature sequence of the desired user i, s i and the variance of the additive white Gaussian noise (AWGN),σ 2. Simulation results show that by reasonably choosing time varying step size, the proposed detector can not only improve the convergence rate, but also reduce the limiting NSE (Normalized Squared Error) values, so it can effectively increase the performance of the system.Blind adaptive multiuser detector has become a research hotspot in recent years due to a number of advantages, but many blind adaptive algorithms involve low convergence rate. This paper presents a novel stochastic blind adaptive multiuser detector without requiring training sequences, which needs only two system parameters: the signature sequence of the desired user i, s i and the variance of the additive white Gaussian noise (AWGN),σ 2. Simulation results show that by reasonably choosing time varying step size, the proposed detector can not only improve the convergence rate, but also reduce the limiting NSE (Normalized Squared Error) values, so it can effectively increase the performance of the system.

关 键 词：CDMA blind adaptive multiuser detector time varying step size convergence rate 

分 类 号：TN929.533[电子电信—通信与信息系统]