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Cooperative wireless communications: a cross-layer approach

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5 Author(s)
Pei Liu ; Polytech. Univ. Brooklyn, NY ; Zhifeng Tao ; Zinan Lin ; Erkip, E.
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This article outlines one way to address these problems by using the notion of cooperation between wireless nodes. In cooperative communications, multiple nodes in a wireless network work together to form a virtual antenna array. Using cooperation, it is possible to exploit the spatial diversity of the traditional MIMO techniques without each node necessarily having multiple antennas. Multihop networks use some form of cooperation by enabling intermediate nodes to forward the message from source to destination. However, cooperative communication techniques described in this article are fundamentally different in that the relaying nodes can forward the information fully or in part. Also the destination receives multiple versions of the message from the source, and one or more relays and combines these to obtain a more reliable estimate of the transmitted signal as well as higher data rates. The main advantages of cooperative communications are presented

Published in:

Wireless Communications, IEEE  (Volume:13 ,  Issue: 4 )