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有限反馈下协作波束形成系统的性能仿真研究

Simulation of Cooperative Beamforming with Limited Feedback
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摘要 针对实际通信系统中发射机难以获得准确的信道状态信息(CSI)的情况,基于放大前馈中继模式和两种不同的拓扑结构,提出了有限反馈的协作波束形成技术,研究了反馈信道的信道状态信息量化对系统性能的影响。仿真结果表明,协作系统的性能与中继终端的位置密切相关,当中继位于信源和目的终端的中间时,协作系统能获得最大的分集增益。信道量化对协作分集系统性能的不利影响是有限的,即使1比特的量化反馈,也能产生相当大的性能增益。 Due to the limited feedback in real wireless communication system, it is impossible to know exact CSI for the transmitters. Based on the amplify - forward model and two kinds of topology configurations, cooperative beamformiug technology with limited feedback has been presented. This paper has researched the system performance under influence of quantification of feedback channel state information. Simulation results indicated that there is a close relationship between performance of cooperative system and the position of relay terminal. System can make the maximum cooperative gains when relay is in the middle of source and destination terminal. The bad influence on system performance under quantification of feedback is so limited that even one bit feedback can make great performance gains.
作者 殷欢 宋高俊
机构地区 江西农业大学南昌商学院
出处 《计算机仿真》 CSCD 北大核心 2009年第4期149-152,共4页 Computer Simulation
关键词 波束形成 协作分集 量化反馈 Beamforming Cooperation diversity Quantized feedback
分类号 TN929.5 [电子电信—通信与信息系统]
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参考文献10

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计算机仿真
2009年 第4期

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