標題: Efficient QR-Based Multi-Mode Precoding for Limited Feedback Multi-User MIMO Systems
作者: Pan, Chien-Hung
Lee, Ta-Sung
電子工程學系及電子研究所
Department of Electronics Engineering and Institute of Electronics
關鍵字: QR decomposition;Multi-mode precoding;Multiple-input multiple-output;Limited feedback system
公開日期: 1-Jan-2014
摘要: This paper proposes QR-based criteria for efficient selection of multi-mode precoders in multi-user multiple-input multiple-output (MU-MIMO) precoded systems with a limited feedback. In particular, a MU-MIMO QR based precoding scheme is developed which takes advantage of the overall precoder design among users in conjunction with QR detection. A selection criterion is developed to identify the precoder that yields the maximum free distance. Efficient mode selection and tree search strategies are adopted to reduce the complexity associated with the identification of the optimum precoder. To further improve the detection performance in correlated channels, an efficient QR-based MMSE V-BLAST detector is proposed. Computer simulations confirm that the proposed QR-based precoding scheme attains the performance of existing schemes with a significantly lower complexity level.
URI: http://dx.doi.org/10.1007/s11277-013-1333-3
http://hdl.handle.net/11536/23630
ISSN: 0929-6212
DOI: 10.1007/s11277-013-1333-3
期刊: WIRELESS PERSONAL COMMUNICATIONS
Volume: 74
Issue: 2
起始頁: 969
結束頁: 987
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