Space-time Coding Combined with Downlink Beamforming and Power Control for DS-CDMA Systems with Two Array Antennas  

作　　者：SUN Xiaoying WANG Shuxun 

机构地区：[1]Institute of Communications Engineering, Jilin University, Changchun 130012, China

出　　处：《Chinese Journal of Electronics》2006年第3期539-544,共6页电子学报（英文版）

基　　金：This work is supported by the National Natural Science Foundations of China （No.60272065）.

摘　　要：In frequency selective fading channel, even though joint space-time coding and Rake receiver scheme is used, only depending on temporal correlation, the Multiple access interference （MAI） introduced by multipath effect could not be suppressed effectively. For further enhancing the downlink performance, in this paper we present a space-time coding in conjunction with downlink beamforming and power control scheme when two array antennas are equipped on base station. We also obtain an iterative algorithm to generate the downlink beammforming weights and transmitted power vectors. This algorithm can minimize the total radiating power while the Signal-to-interferenceand-noise （SINR） requirement of mobile receiver is maintainted. For reducing the complexity due to the existence of multidelay paths, a simplified algorithm is suggested using Equivalent one-path channel vectors （EOCVs） to replace multipath channel vectors.

关 键 词：Space-time coding Transmit diversity Downlink beamforming Power control. 

分 类 号：TN91[电子电信—通信与信息系统]