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Linear Precoding for Multiuser MIMO Systems with Multiple Base Stations

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2 Author(s)
Azzam, I.H. ; Res. in Motion, Waterloo, ON, Canada ; Adve, R.S.

Linear precoding for multiuser multiple input multiple output (MIMO) cellular systems has generally focused on a single isolated cell. A crucial tool in algorithm development has been a downlink/uplink duality. Here we investigate downlink multiuser communications across multiple cells. Previous work identified the resulting asynchronous interference as a key issue. We prove the existence of a downlink/uplink duality requiring time reversal. This duality is used to develop an effective linear precoding algorithm for multiuser, multi-cell, MIMO systems. Simulation results illustrate the importance of accounting for, and to quantify the loss due to, asynchronous interference.

Published in:

Communications, 2009. ICC '09. IEEE International Conference on

Date of Conference:

14-18 June 2009