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.
Original language | English |
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Title of host publication | 2007 IEEE International Conference on Communications, ICC'07 |
Place of Publication | Piscataway, NJ |
Publisher | Institute of Electrical and Electronics Engineers (IEEE) |
Pages | 5377-5382 |
Number of pages | 6 |
ISBN (Print) | 1424403537, 9781424403530 |
DOIs | |
Publication status | Published - 2007 |
Externally published | Yes |
Event | 2007 IEEE International Conference on Communications, ICC'07 - Glasgow, Scotland, United Kingdom Duration: 24 Jun 2007 → 28 Jun 2007 |
Other
Other | 2007 IEEE International Conference on Communications, ICC'07 |
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Country/Territory | United Kingdom |
City | Glasgow, Scotland |
Period | 24/06/07 → 28/06/07 |