智能天线技术是!"#$ "&’ 系统中的关键技术$其中下行波束赋形使下行波束对准移动用户$可靠地减小了干扰$提 高了系统的频谱利用率 -Smart antenna technology! " Key technologies $# $ & ' system which Downlink Beamforming downlink beam alignment mobile user $ reliably reduce interference $ improve the

In a multiple transmit antenna, single antenna per receiver downlink channel with limited channel state feedback, we consider the following question: given a constraint on the total system-wide feedback load, is it referable to get low-rate/coarse ch

CSI feedback allows downlink transmission to be adaptively optimized based on the instantaneous DL channel, so that closedloop beamforming and adaptive link adaptation can be enabled to optimize the system performance. The DL reference sign