| Space-Time Coded Beamforming for DS CDMA Downlink |
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| 作者姓名： | WANG Shi-lu XU Chang-jiang FENG Guang-zengNanjing University of Posts and Telecommunications Nanjing P.R.China |
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| 作者单位： | WANG Shi-lu，XU Chang-jiang，FENG Guang-zengNanjing University of Posts and Telecommunications，Nanjing 21003，P.R.China |
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| 基金项目： | This work is supported by Jiangsu Provincial Natural Science Research Fund of China. |
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| 摘 要： | 1 Introduction In 3G mobile system, Code Division Multiple Access(CDMA) is a promising multiple access techniques. It iswell know that BeamFormin ( BF), Space Time Coding(STC) and Multiuser Detection(MUD) techniques in CDMAsystem can effectively resist Multi Path Interference (MPI),MAI and near far effects. So the system capacity will be im proved greatly by employing these techniques1,2,8]. In Ref.3] introduces Water Filling(WF) theory into STC to assignth…
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Space-Time Coded Beamforming for DS-CDMA Downlink |
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| WANG Shi-lu,XU Chang-jiang,FENG Guang-zengNanjing University of Posts and Telecommunications,Nanjing ,P.R.China.Space-Time Coded Beamforming for DS CDMA Downlink[J].The Journal of China Universities of Posts and Telecommunications,2005,12(1). |
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| Authors: | WANG Shi-lu XU Chang-jiang FENG Guang-zeng |
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| Abstract: | In this paper,we analyze the scheme of Space-Time Coded BeamForming(STC-BF)for the downlink of DS-CDMA system over frequency-selective fading channels and give the numerical simulations on the scheme.The blind multiuser detection is employed at receiver to suppress the Multi-Access Interference(MAI).The Space-Time Coding(STC)and BF are combined to mitigate the performance degradation due to multipath fading and various interferences.The numerical simulations show that the BF can compensate the performance loss of STC due to the channel correlation and then the STC-BF can greatly improve the performance of CDMA system. |
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| Keywords: | CDMA space-time coding beamforming multiuser detection transmit diversity |
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