空间分集技术对中继信道特性的影响分析  

Analysis of Relay Channel Characteristics under Influence of Space Diversity

作　　者：李阳[1] 白贵芳[1] 冯文涛[1] 

机构地区：[1]信息工程大学信息工程学院,河南郑州450002

出　　处：《信息工程大学学报》2007年第2期179-181,190,共4页Journal of Information Engineering University

基　　金：国家自然科学基金资助项目(NSF60172029)

摘　　要：采用发送波束成形技术(TB)和接收最大比合成技术(MRC)分析了多天线情况下的多中继信道特性。研究结果显示k次中继网络能分解成k个独立信道,其中每个信道的增益都不相同,在终端对信号进行了有效地合成。假定所有中继信道的天线总数固定为N,中继信道的功率都是平均分配的,总发射功率等于信号源功率,那么网络的容量下限由N个具有单独天线的中继信道来决定,其上限由一个具有N个天线的单中继信道决定。In this paper we analyze the performance of multiple relay channels when multiple antennas are deployed only at relays. We apply two antenna diversity techniques at relays, namely on receive transmit beamforming （TB） and maximum ratio combining （MRC）. We show that with K relays the network can be decomposed into K diversity channels each with a different channel gain, and that the signals can be effectively combined at the destination. We assume that the total number of antennas at all relays is fixed at N. If the total transmit power for all relays are the same as for the source and equally distributed among all the relays, the network capacity will be lower bounded by that of N relay channels each with single antenna, and upper bounded by that of single relay channels with N antennas.

关 键 词：多天线 多中继信道 发送波束成形技术 接收最大比合成技术 空间分集 

分 类 号：TN82[电子电信—信息与通信工程]