A Low-Complexity Precoding Scheme for the Downlink of Multi-Cell Multi-User MIMO AF System

Sambo, Y., Héliot, F. and Imran, M. A. (2012) A Low-Complexity Precoding Scheme for the Downlink of Multi-Cell Multi-User MIMO AF System. In: 2012 IEEE Wireless Communications and Networking Conference (WCNC), Paris, France, 01-04 Apr 2012, pp. 737-741. ISBN 9781467304375 (doi:10.1109/WCNC.2012.6214468)

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Abstract

Because of its simplicity, amplify-and-forward (AF) is one of the most popular cooperative relaying technique. Relays are used in cooperative communication to improve reliability, coverage or spectral efficiency of cell-edge users. However, relays tend to increase the interferences seen by users of adjacent cells, particularly by the cell-edge users, when used in multi-cell systems. In this paper, we propose a low-complexity precoding scheme to mitigate the effect of other-cell interference (OCI) in cooperative communication. The scheme is designed by taking into account the interference plus noise covariance matrix of each user for mitigating the interference at each receiver by means of precoding at the relay node. Simulation results show the effectiveness of the proposed scheme, both in terms of sum-rate and computational complexity, when compared to other existing OCI-aware precoding algorithms for AF.

Item Type:Conference Proceedings
Additional Information:The research leading to these results has received funding from the European Commission’s Seventh Framework Programme FP7/2007-2013 under grant agreement n∘-223937 project SMART-Net.
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Imran, Professor Muhammad
Authors: Sambo, Y., Héliot, F., and Imran, M. A.
College/School:College of Science and Engineering > School of Engineering
ISSN:1558-2612
ISBN:9781467304375
Published Online:11 June 2012
Copyright Holders:Copyright © 2012 IEEE
First Published:First published in 2012 IEEE Wireless Communications and Networking Conference (WCNC): 737-741
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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