標題: HYBRID MIMO-OFDM FOR DOWNLINK MULTI-USER COMMUNICATIONS OVER MILLIMETER CHANNELS WITH NO INSTANTANEOUS FEEDBACK
作者: Lee, Po-Hsuan
Lin, Yuan-Pei
電子工程學系及電子研究所
Department of Electronics Engineering and Institute of Electronics
公開日期: 1-一月-2019
摘要: In this paper, we consider hybrid precoding for multiuser MIMO-OFDM systems in downlink communications with no instantaneous channel information. In a hybrid MIMO-OFDM, precoding consists of two parts: a RF (Radio Frequency) precoder that is subcarrier independent and subcarrier precoders that are subcarrier dependent. We design the precoders of both parts based on the statistics of the user channels, which requires infrequent feedback. To address interference among the users, the signals of different users are transmitted using spatially orthogonal beams. Due to the sparse nature of mmWave channels, the use of orthogonal beams leads to spatial separation among the users and effective prevention of interference. Simulations are given to show that the performance of the proposed statistical hybrid precoding system is close to that of a hybrid system that enjoys full-CSI (Channel State Information).
URI: http://hdl.handle.net/11536/152964
ISBN: 978-1-7281-0397-6
ISSN: 0271-4302
期刊: 2019 IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS (ISCAS)
起始頁: 0
結束頁: 0
顯示於類別:會議論文