NDLI: Random Unitary Beamforming With Partial Feedback for MISO Downlink Transmission Using Multiuser Diversity

Content Provider	IEEE Xplore Digital Library
Author	Haibo Wang Kirubarajan, T.
Copyright Year	1991
Abstract	In this paper, we study the problem of downlink transmission in multiple-input-single-output (MISO) wireless communication systems using multiuser diversity. There are antennas at the base station (BS) and single-antenna receivers. The performance of multiuser diversity depends on the number of users that have independent channel realizations. It is well known that increasing the number of users improves the performance at the expense of increasing feedback that is proportional to the number of users. For sufficiently large K, the capacity scales like M log log K. When K is large, increasing feedback limits practical applications of the multiuser diversity. Our approach is to reduce the feedback by selecting a threshold for the l_infin-norm of the normalized cross-correlation (\|\|z_k\|\|_infin) between the users' channel and the beamforming matrix based on the random unitary beamforming. The average amount of feedback per time slot is real numbers and integers which does not change with K. To improve fairness, an equal ratio scheduling algorithm which could serve the users with different rate requirements is developed. Monte Carlo simulation results is provided to verify the performance of the proposed algorithm.
Sponsorship	IEEE Signal Processing Society
Page Count	10
File Size	529982
Starting Page	3380
Ending Page	3389
File Format	PDF
ISSN	1053587X
Volume Number	55
Issue Number	7
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-07-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Array signal processing Feedback Downlink Channel state information Feeds Mutual information Base stations MIMO Time-varying channels Signal to noise ratio scheduling multiple antennas multiuser diversity random unitary beamforming
Content Type	Text
Resource Type	Article
Subject	Signal Processing Electrical and Electronic Engineering

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