NDLI: Techniques for Multi-User MIMO with Two-Way Training

Content Provider	IEEE Xplore Digital Library
Author	Gomadam, K.S. Papadopoulos, H.C. Sundberg, C.-E.W.
Copyright Year	2008
Description	Author affiliation: Electr. Eng. & Comput. Sci., Univ. of California, Irvine, CA (Gomadam, K.S.)
Abstract	We consider forward-link multiuser MIMO transmission, whereby K users are served by a base station with a large number of (potentially distributed) transmit antennas. We address the problem of channel state information (CSI) mismatch between the transmitter and the receivers with a two-way training scheme. In a quasi-static setting, the proposed scheme requires only K pilot symbols for uplink training and as little as one symbol for downlink training. In particular, we show that the performance of the system where the receiver has perfect channel knowledge can be approached with a small value of downlink training symbols. We consider two variants of linear MMSE precoders that take into account the quality of the channel state information at the transmitter and demonstrate that robust high sum-rate systems can be designed that rely on single-antenna receivers, provided that a large enough number of antennas is used for transmission. Finally, we sketch an example of implementations for the equal rate case.
Starting Page	3360
Ending Page	3366
File Size	208148
Page Count	7
File Format	PDF
ISBN	9781424420759
DOI	10.1109/ICC.2008.632
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-05-19
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	MIMO Transmitters Feedback Transmitting antennas Channel state information Receiving antennas Data communication Base stations Downlink Aggregates
Content Type	Text
Resource Type	Article

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