NDLI: Efficient Receive Antenna Selection Algorithms and Framework for Transmit Zero-Forcing Beamforming

Content Provider	IEEE Xplore Digital Library
Author	Boon Chin Lim Schlegel, C. Krzymien, W.A.
Copyright Year	2006
Description	Author affiliation: Dept. of Electr. & Comput. Eng., Alberta Univ., Edmonton, Alta. (Boon Chin Lim; Schlegel, C.; Krzymien, W.A.)
Abstract	MIMO wireless downlinks using transmit zero-forcing beamforming (TZFBF) with $M_{T}$ transmit antennas can serve up to K=MTreceivers, each equipped with one antenna. To maximize the sum rate, waterfilling can be used. It is shown that unlike classical waterfilling, TZFBF waterfilling cannot simply drop the poorer spatial modes during optimization. Instead, receive antenna selection (RAS) must be incorporated and achieving the maximum sum rate requires an exhaustive search over $Sigma_{\|S\|}(_{MT}C_{\|S\|})$ iterations to find the optimal subset S of active receivers where \|S\| = $1,...,M_{T}.$ In principle, a separate RAS algorithm can be used in conjunction with waterfilling to reduce the exponential complexity $O(2^{M}$ $_{T})$ of the exhaustive search to linear complexity $O(M_{T}).$ We develop optimization algorithms that emulate classical waterfilling by progressively reducing the effects of poor spatial modes in $M_{T}$ iterations. They do so by performing RAS jointly during the waterfilling process at little additional complexity. By avoiding a separate RAS process, complexity is thus further reduced. For the typical case where $K>M_{T},$ we propose a 2-phase framework that helps reduce the overall complexity while meeting the TZFBF dimensional constraints. Numerical results over different channel conditions are given
Starting Page	2241
Ending Page	2245
File Size	2860563
Page Count	5
File Format	PDF
ISBN	0780393910
ISSN	15502252
DOI	10.1109/VETECS.2006.1683255
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-05-07
Publisher Place	Australia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Receiving antennas Array signal processing Downlink Transmitting antennas Base stations Channel state information Transmitters Intersymbol interference Mobile antennas Computational complexity antenna selection Multi-user downlink beam-forming
Content Type	Text
Resource Type	Article
Subject	Applied Mathematics Electrical and Electronic Engineering Computer Science Applications

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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