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Linear Precoding for Multiuser MIMO Systems with Multiple Base Stations

Summary: Linear Precoding for Multiuser MIMO Systems
with Multiple Base Stations
Imad H. Azzam
Research in Motion,
305 Phillip Street, Waterloo, ON, Canada N2L 3W8
Email: iazzam@rim.com
Raviraj S. Adve
Dept. of Elec. and Comp. Eng., University of Toronto,
10 King's College Road, Toronto, ON, Canada M5S 3G4.
Email: rsadve@comm.utoronto.ca
Abstract--Linear precoding for multiuser multiple input mul-
tiple 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,


Source: Adve, Raviraj - Department of Electrical and Computer Engineering, University of Toronto


Collections: Engineering