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

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 arbitrary-length 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.

18 pages, 10 figures, accepted for publication in IEEE Transactions on Information Theory

References in corpus (1)

• Capacity and Character Expansions: Moment generating function and other exact results for MIMO correlated channels

Cited by in corpus (4)

• Independence-Checking Coding for OFDM Channel Training Authentication: Protocol Design, Security, Stability, and Tradeoff Analysis
• Performance Analysis of Heterogeneous Feedback Design in an OFDMA Downlink with Partial and Imperfect Feedback
• Eigenvalue Dynamics of a Central Wishart Matrix with Application to MIMO Systems
• Optical MIMO communication with unequal power allocation to channels