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A Near-Capacity Linear Precoder for the MIMO Broadcast Channel

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1 Author(s)
Tosato, F. ; Philips Research Laboratories, Cross Oak Lane, Redhill, Surrey, RH1 5HA, U.K. Tel [Fax]: +44 (0) 1293 815 475 [024] ¿ email: filippo.tosato@philips.com

Dirty-paper coding (DPC) is a well-known construction capable of achieving the ultimate capacity limit of the MIMO broadcast channel (MIMO-BC). One recently proposed DPC scheme is based on Voronoi codes, minimum mean-square error generalised decision-feedback equaliser (MMSE-GDFE), dither and lattice decoding. Building on this approach, in this paper we introduce a linear pre-coder for the MIMO-BC, which, although sub-optimal compared to the original DPC construction, may be regarded as a valuable option for practical applications because of its simplicity and its close-to-capacity achievable rates. We provide a theoretical analysis as well as numerical results which show the achievable rates of our linear pre-processing scheme compared to the DPC construction and to another recently proposed linear technique for throughput maximisation, based on gradient nulling.

Published in:

Communications, 2006. ICC '06. IEEE International Conference on  (Volume:4 )

Date of Conference:

June 2006

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