NDLI: On Amplify-and-Forward Relay Networks with Multiple Source-Destination Pairs

Content Provider	IEEE Xplore Digital Library
Author	Yupeng Liu Petropulu, A.P.
Copyright Year	2010
Abstract	The paper considers a scenario where there are multiple single antenna source-destination (S-D) pairs in the network that need to communicate simultaneously. An amplify and-forward relaying scheme is proposed, that employs single relay equipped with multiple antennas, and is implemented in two steps. In the first step the sources transmit simultaneously, while in the second step the relay retransmits the signals that it receives on its antennas after linearly processing them via a beamforming (BF) matrix. The BF matrix is obtained by maximizing the sumrate of all source-destination pairs subject to a total power constraint at the relay. Since the optimal BF design problem is non-convex and hard to solve, a suboptimal zero-forcing beamforming (ZFBF) design approach is proposed. It is shown that with high source power, or high relay power, such a relaying system achieves either the same sumrate as the cut- set bound with ZF receiver/precoder and timing parameter 1/2, or maintains a constant gap from it, which shows the optimality of the proposed scheme in terms of multiplexing gain.
Starting Page	1
Ending Page	5
File Size	166606
Page Count	5
File Format	PDF
ISBN	9781424456369
ISSN	1930529X
e-ISBN	9781424456383
e-ISBN	9781424456376
DOI	10.1109/GLOCOM.2010.5683845
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-12-06
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Relays Receivers Antennas MIMO Signal to noise ratio Resource management
Content Type	Text
Resource Type	Article

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