CUED Publications database

MIMO block-fading channels with mismatched CSI

Asyhari, AT and Fabregas, AGI (2014) MIMO block-fading channels with mismatched CSI. IEEE Transactions on Information Theory, 60. pp. 7166-7185. ISSN 0018-9448

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© 2014 IEEE. We study transmission over multiple-input multiple-output block-fading channels with imperfect channel state information (CSI) at both the transmitter and receiver. In particular, based on mismatched decoding theory for a fixed channel realization, we investigate the largest achievable rates with independent and identically distributed inputs and the nearest neighbor decoder. We then study the corresponding information outage probability in the high signal-to-noise ratio (SNR) regime and analyze the interplay between estimation error variances at the transmitter and receiver to determine the optimal outage exponent, defined as the high-SNR slope of the outage probability plotted in a logarithmic-logarithmic scale against the SNR. We demonstrate that despite operating with imperfect CSI, power adaptation can offer substantial gains in terms of outage exponent.

Item Type: Article
Divisions: Div F > Signal Processing and Communications
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:32
Last Modified: 07 Mar 2019 14:30
DOI: 10.1109/TIT.2014.2357016