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ICC
2007
IEEE

Accurate Approximations for the Capacity Distribution of OFDM-Based Spatial Multiplexing

14 years 1 months ago
Accurate Approximations for the Capacity Distribution of OFDM-Based Spatial Multiplexing
Abstract— We derive new analytic approximations to the capacity distribution of frequency-selective Rayleigh fading MIMO channels. The results apply specifically to OFDM-based spatial multiplexing. In particular, we present a new closed-form Gaussian approximation which yields very high accuracy in many scenarios. For the low SNR regime, we also present a new simpler closed-form Gamma approximation, which we show to be even more accurate than Gaussian in this case. Our approximations are based on new exact closed-form expressions which we derive for the variance of the mutual information which, in contrast to previous results, apply for systems with both arbitrary numbers of antennas and arbitrary-length channel delay profiles.
Matthew R. McKay, Peter J. Smith, Himal A. Surawee
Added 02 Jun 2010
Updated 02 Jun 2010
Type Conference
Year 2007
Where ICC
Authors Matthew R. McKay, Peter J. Smith, Himal A. Suraweera, Iain B. Collings
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