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On the Mutual Information Distribution of OFDM-Based Spatial Multiplexing: Exact Variance and Outage Approximation

McKay, Matthew and Smith, Peter J and Suraweera, Himal and Collings, Iain (2008) On the Mutual Information Distribution of OFDM-Based Spatial Multiplexing: Exact Variance and Outage Approximation. IEEE Transactions on Information Theory, 54 (7). pp. 3260-3278. ISSN 0018-9448

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Abstract

This paper considers the distribution of the mutual information of frequency-selective spatially-uncorrelated Rayleigh fading MIMO channels. Results are presented for OFDM-based spatial multiplexing. New exact closed-form expressions are derived for the variance of the mutual information. In contrast to previous results, our new expressions apply for systems with both arbitrary numbers of antennas and arbitrarylength channels. Simplified expressions are also presented for high and low SNR regimes. The analytical variance results are used to provide accurate analytical approximations for the distribution of the mutual information and the outage capacity.

Item Type: Article
Uncontrolled Keywords: ResPubID16020, multiple-input–multiple-output (MIMO) systems, mutual information, orthogonal frequency-division multiplexing(OFDM)
Subjects: Faculty/School/Research Centre/Department > Centre for Telecommunications and Micro-Electronics (CTME)
FOR Classification > 0906 Electrical and Electronic Engineering
SEO Classification > 970110 Expanding Knowledge in Technology
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Depositing User: VUIR
Date Deposited: 07 Sep 2011 06:13
Last Modified: 07 Sep 2011 06:13
URI: http://vuir.vu.edu.au/id/eprint/3830
DOI: 10.1109/TIT.2008.924685
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Citations in Scopus: 36 - View on Scopus

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