A Beamformer Construction Method Via Partial Feedback of Channel State Information of MIMO Systems
다중 입출력 시스템의 부분적 채널 정보 궤환을 통한 빔포머 형성 방안

Yoonsoo Kim, Wonjin Sung
2014 Journal of the Institute of Electronics and Information Engineers  
For wireless communication systems of (and beyond) LTE-Advanced, multiple-input multiple-output (MIMO) with an increased number of antennas will be utilized for system throughput improvement. When using such an increased number of antenna, an excessive amount of overhead in channel state information (CSI) feedback can be a serious problem. In this paper, we propose methods which reduce the CSI feedback overhead, particularly including application strategies for multi-rank transmission targeted
more » ... nsmission targeted for two or more reception antennas. To reduce the information which is instantaneously transmitted from the reception node to the transmission node, we present a beamforming method utilizing singular value decomposition (SVD) based on channel estimation of partitioned antenna arrays. Since the SVDs for partial matrices of the channel may lose the characteristics of the original unpartitioned matrix, we explain an appropriate scheme to cope with this problem.
doi:10.5573/ieie.2014.51.6.026 fatcat:ybowti3drnfuplmvsc5calgrcq