| Joint Transmit Beamforming and Power Control for CDMA System |
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| 作者姓名： | LI Ji-long CHEN Yu LI Chun-yuan ZHANG PingBeijing University of Posts and Telecommunications Beijing P.R.China |
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| 作者单位： | LI Ji-long，CHEN Yu，LI Chun-yuan，ZHANG PingBeijing University of Posts and Telecommunications，Beijing 100876，P.R.China |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 1 Introduction Power control and beamforming are two main methods toreduce interference in CDMA cellular communication sys tem. In power control, the transmitters powers are constant ly adjusted when the instantaneous SIR is not equal to targetSIR, so that the quality of weak links is improved. Base sta tion equipped with antenna arrays may adjust their beam pat terns so that they have maximum gain towards the directionsof target mobiles and minimum gain towards the other direc tio…
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Joint Transmit Beamforming and Power Control for CDMA System |
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| LI Ji-long,CHEN Yu,LI Chun-yuan,ZHANG PingBeijing University of Posts and Telecommunications,Beijing ,P.R.China.Joint Transmit Beamforming and Power Control for CDMA System[J].The Journal of China Universities of Posts and Telecommunications,2005,12(1). |
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| Authors: | LI Ji-long CHEN Yu LI Chun-yuan ZHANG Ping |
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| Abstract: | Downlink transmit beamforming is a promising technique to reduce interference,and power control is a technique to adjust transmission power to satisfy the link quality.Joint transmission power control and beamforming are proposed to minimize total transmission power.The joint optimization problem is solved by receiver beamforming and power control in virtual uplink.SIR based power control is performed to adjust the power allocation,and transmit beamforming weight vectors are determined by Minimum Variance Distortionless Response(MVDR)criterion.The multipath combining weight vectors are determined by maximum ratio combining criterion.Simulation results show the joint optimization scheme decreases the transmission power,and system performance is enhanced. |
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| Keywords: | beamforming power control adaptive antenna CDMA |
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