| A Novel Stochastic Blind Adaptive Multiuser Detector for CDMA Systems |
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| 作者姓名： | 吕平宝 Xie Jianying Yin Zhiming |
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| 作者单位： | School of |
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| 基金项目： | SupportedbytheHighTechnologyResearchandDevelopmentProgrammeofChina |
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| 摘 要： | 0 IntroductionInCDMAsystems ,multiuserdetectionisoneofthekeytechniquesforcombatingmultiuseraccessin terference (MAI)andthenear farproblem .Linearadaptivemultiuserdetectionhasattractedagreatdealofattentionbecauseithascertainsignificantadvan tages.Forexample ,itcanadapttotime varyingchanneltoadjustsystem parameters.Nevertheless ,thecommonadaptivemultiuserdetectionalgorithmshavecertaindrawbacks ,especiallyundertime varyingmultipathchannelenvironments.Whenchannelre sponsechangessuddenlyornewc…
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A Novel Stochastic Blind Adaptive Multiuser Detector for CDMA Systems |
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| Xie Jianying,Yin Zhiming.A Novel Stochastic Blind Adaptive Multiuser Detector for CDMA Systems[J].High Technology Letters,2003,9(2). |
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| Authors: | Xie Jianying Yin Zhiming |
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| Abstract: | 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, si and the variance of the additive white Gaussian noise (AWGN),σ2. 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. |
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| Keywords: | CDMA blind adaptive multiuser detector time varying step size convergence rate |
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