On the fundamentally asynchronous nature of interference in cooperative base station systems

Zhang, Hongyuan and Mehta, Neelesh B and Molisch, Andreas F and Zhang, Jin and Dai, Huaiyu (2007) On the fundamentally asynchronous nature of interference in cooperative base station systems. In: IEEE ICC 2007, Glasgow, Scotland, 24-28 June 2007, Glasgow.

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Abstract

Cooperative transmission by base stations can significantly improve the spectral efficiency of multiuser, multi-cell multiple input multiple output systems. We show that in such systems the multiuser interference is asynchronous by nature, even when perfect timing-advance mechanisms ensure that the desired signal components arrive synchronously. We establish an accurate mathematical model for the asynchronism, and use it to show that the asynchronism leads to a significant performance degradation of existing linear preceding designs that assumed synchronous interference. We consider three different previously proposed precoding designs, and show how to modify them to effectively mitigate asynchronous interference.

Item Type:	Conference Paper
Publisher:	IEEE
Additional Information:	Copyright 2007 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Department/Centre:	Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited:	17 Oct 2011 05:57
Last Modified:	17 Oct 2011 05:57
URI:	http://eprints.iisc.ac.in/id/eprint/41431

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