The tradeoff between diversity gain and interference suppression via beamforming in a CDMA system
The tradeoff between diversity gain and interference suppression via beamforming in a CDMA system
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DOI：
10.1109/milcom.2003.1290343
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发表时间：
2003-10
期刊：
影响因子：
--
通讯作者：
Y. Zhang;L. Milstein;P. Siegel
中科院分区：
文献类型：
--
作者：
Y. Zhang;L. Milstein;P. Siegel
本文研究了一个在发射端和接收端都具有多个天线的异步直接序列码分多址（DS-CDMA）系统的上行链路。本文分析了在空间相关瑞利衰落信道下多址干扰（MAI）的系统性能。假设完美的信道知识，在发射机，最大比传输（MRT）的加权发射信号最佳的打击信号衰落。此外，自适应波束形成接收采用抑制多址干扰，也对抗衰落。我们研究了不同的发射和接收天线的数量上的分集增益和干扰抑制的效果。
In this paper, the uplink of an asynchronous direct sequence code division multiple access (DS-CDMA) system with multiple antennas at both the transmitter and the receiver is considered. We analyze the system performance over a spatially correlated Rayleigh fading channel with multiple access interference (MAI). Assuming perfect channel knowledge available at the transmitter, maximal ratio transmission (MRT) is employed to weight the transmitted signal optimally in terms of combating signal fading. Further, adaptive beamforming reception is adopted to suppress MAI and also to combat the fading. We examine the effect of varying the number of transmit and receive antennas on the diversity gain and interference suppression.