NDLI: Relay selection in multi-user amplify-forward wireless relay networks

Content Provider	IEEE Xplore Digital Library
Author	Enlong Che Tuan, H.D. Nguyen, H.H.
Copyright Year	2012
Description	Author affiliation: Department of Electrical and Computer Engineering, University of Saskatchewan, Saskatoon, Canada (Nguyen, H.H.) \|\| Faculty of Engineering and Information Technology, University of Technology, Sydney, Australia (Enlong Che; Tuan, H.D.)
Abstract	For multi-user (MU) amplify-and-forward (AF) cooperative networks, their spectral efficiency can be upgraded within the orthogonal transmission of each source node to an assigned subset of all available relays while their information throughput can be improved through optimized power allocation. We consider the joint optimization in both relay assignment for each source-destination pair and power allocation, which is in fact among the hardest problems in optimization. This is the minimization of a nonconvex objective function subject to mixed integer constraints. The existing numerical algorithms could rarely address to its solutions through computationally affordable procedures. Even the conventional relaxation of the integer constraints by linear constraints does not lead to convex optimization, so the standard convexification does not work either. Nevertheless, we show that it can be effectively solved in the d.c. (difference of two convex) programming context. Numerical simulation confirms the effectiveness of our setting.
Starting Page	2485
Ending Page	2488
File Size	180513
Page Count	4
File Format	PDF
ISBN	9781467300452
ISSN	15206149
e-ISBN	9781467300469
e-ISBN	9781467300445
DOI	10.1109/ICASSP.2012.6288420
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-03-25
Publisher Place	Japan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Relays Resource management Optimization Signal to noise ratio Linear programming Wireless communication Joints d.c. programming Amplify-and-Forward relay relay selection power allocation maxmin SNR
Content Type	Text
Resource Type	Article

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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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