Full-rate full-diversity achieving MIMO precoding with partial CSIT

Dutta, Biswajit and Barik, Somsubhra and Chockalingam, Ananthanarayanan (2011) Full-rate full-diversity achieving MIMO precoding with partial CSIT. In: 2011 IEEE Wireless Communications and Networking Conference (WCNC), 28-31 March 2011, Cancun, Quintana Roo.

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Abstract

In this paper, we consider a slow-fading nt ×nr multiple-input multiple-output (MIMO) channel subjected to block fading. Reliability (in terms of achieved diversity order) and rate (in number of symbols transmitted per channel use) are of interest in such channels. We propose a new precoding scheme which achieves both full diversity (nt ×nrth order diversity) as well as full rate (nt symbols per channel use) using partial channel state information at the transmitter (CSIT). The proposed scheme achieves full diversity and improved coding gain through an optimization over the choice of constellation sets. The optimization maximizes dmin2 for our precoding scheme subject to an energy constraint. The scheme requires feedback of nt - 1 angle parameter values, compared to 2ntnr real coefficients in case of full CSIT. Further, for the case of nt × 1 system, we prove that the capacity achieved by the proposed scheme is same as that achieved with full CSIT. Error rate performance results for nt = 3,4,8 show that the proposed scheme performs better than other precoding schemes in the literature; the better performance is due to the choice of the signal sets and the feedback angles in the proposed scheme.

Item Type:	Conference Proceedings
Publisher:	IEEE
Additional Information:	Copyright of this article belongs to IEEE.
Keywords:	MIMO Precoding; Constellation Sets; Full-Diversity; Full-Rate; Partial CSIT
Department/Centre:	Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited:	08 Apr 2013 09:18
Last Modified:	08 Apr 2013 09:18
URI:	http://eprints.iisc.ac.in/id/eprint/46197

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