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MIMO block-fading channels with mismatched CSI
Asyhari, A.Taufiq Guillen i Fabregas, A.
Asyhari, A.Taufiq
Guillen i Fabregas, A.
Publication Date
2014-09-10
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openAccess
Accepted for publication
2014-08-23
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Abstract
We study transmission over multiple-input multiple-output (MIMO) block-fading channels with
imperfect channel state information (CSI) at both the transmitter and receiver. Specifically, based on
mismatched decoding theory for a fixed channel realization, we investigate the largest achievable rates
with independent and identically distributed inputs and a 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 at the 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.
Version
Accepted manuscript
Citation
Asyhari AT and Guillen i Fabregas A (2014) MIMO block-fading channels with
mismatched CSI. IEEE Transactions on Information Theory. 60(11): 7166-7185.
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Type
Conference paper