On the Variations in Mutual Information of MIMO Communication Systems Due to Perturbed Channel State Information at Transmitter

Shankar, Bhavani MR and Hari, KVS (2006) On the Variations in Mutual Information of MIMO Communication Systems Due to Perturbed Channel State Information at Transmitter. In: IEEE Transactions on Communications, 54 (9). pp. 1593-1603.

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Abstract

In this paper, we address the issue of perturbed information at the transmitter in a multiple-input multiple-output (MIMO) system. Two schemes, correlation matrix feedback and channel information feedback, are proposed to convey information necessary for achieving capacity to the transmitter. This information is perturbed due to various impairments. A perturbation analysis is carried out to study the variations in mutual information for each of the proposed schemes. For ergodic channels, this analysis is used to design a MIMO system with a limited rate feedback. Using a codebook-based approach, vector quantizers are designed to minimize the loss in ergodic capacity for each of the proposed schemes, and their performance is studied. A non-codebook method, parameter-based feedback, is also presented, and the underlying rate-performance tradeoff is highlighted.

Item Type:	Journal Article
Publication:	IEEE Transactions on Communications
Publisher:	IEEE
Additional Information:	Copyright 2006 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.
Keywords:	Channel state information (CSI);Ergodic capacity;Limited-rate feedback;Multiple-input multiple-output (MIMO) system; Perturbation analysis;Perturbed information;Vector quantization
Department/Centre:	Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited:	25 Aug 2008
Last Modified:	19 Sep 2010 04:32
URI:	http://eprints.iisc.ac.in/id/eprint/8859

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