Asyhari, A. TaufiqGuillén i Fábregas, A. (Albert)2018-12-072018-12-072014Asyhari AT, Guillén A. MIMO block-fading channels with mismatched CSI. IEEE Trans Inf Theory. 2014;60(11):7166-85. DOI: 10.1109/TIT.2014.23570160018-9448http://hdl.handle.net/10230/36015We 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.application/pdfeng© 2014 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. The final published article can be found at http://dx.doi.org/10.1109/TIT.2014.2357016info:eu-repo/semantics/articlehttp://dx.doi.org/10.1109/TIT.2014.2357016Block fadingDiversityGeneralized mutual informationImperfect channel state informationMIMOMismatched decodingMultiple antennaNearest neighbor decodingOutage probabilityOutage exponentPower adaptationinfo:eu-repo/semantics/openAccess