Distributed beamforming in multi-user cooperative wireless networks

This paper considers a distributed beamformer across multiple relay nodes in a two-hop cooperative wireless network that involves multiple concurrent source-destination pairs. Each of the nodes involved in the problem, including source, relay, and destination nodes, is assumed to use a single antenn...

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Bibliographic Details
Published in2009 Fourth International Conference on Communications and Networking in China pp. 1 - 5
Main Authors Yimin Zhang, Xin Li, Amin, M.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.08.2009
Subjects
amplify-and-forward relay
Array signal processing
Bandwidth
Cooperative wireless networks
distributed beamforming
Energy consumption
MIMO
Relays
Resource management
source selection
sum capacity
Time division multiple access
Upper bound
Weight control
Wireless networks
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DOI10.1109/CHINACOM.2009.5339833

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Summary:This paper considers a distributed beamformer across multiple relay nodes in a two-hop cooperative wireless network that involves multiple concurrent source-destination pairs. Each of the nodes involved in the problem, including source, relay, and destination nodes, is assumed to use a single antenna. The focus of this paper is the optimization of the relay weights that maximize the sum capacity of the wireless network. A simple solution for the determination of relay weights is provided to yield nearly optimum network capacity. Simulation results validate that, in the presence of a high number of relay nodes, the average network capacity achieved through the concurrent transmission of multiuser streams exceeds that achieved by TDMA and single-user transmission with opportunistic source selection schemes.
DOI:10.1109/CHINACOM.2009.5339833