Lozano Solsona, AngelTulino, Antonia M.Verdú, Sergio2012-01-192012-01-192006Lozano A, Tulino A M, Verdu S. High-SNR power offset in multiantenna communication. IEEE Transactions on Information Theory. 2005; 51(12): 4134-4151. DOI 10.1109/TIT.2005.8589370018-9448http://hdl.handle.net/10230/16124The analysis of the multiantenna capacity in the high-SNR regime has hitherto focused on the high-SNR slope (or maximum multiplexing gain), which quantifies the multiplicative /nincrease as function of the number of antennas. This traditional characterization is unable to assess the impact of prominent channel features since, for a majority of channels, the slope equals the minimum of the number of transmit and receive antennas. Furthermore, a characterization based solely on the slope captures only the scaling but it has no notion of the power required for a certain capacity. This paper advocates a more refined characterization whereby, as function of SNRjdB, the high-SNR capacity is expanded as an affine function where the impact of channel features such as antenna correlation, unfaded components, etc, resides in the zero-order term or power offset. The power offset, for which we find insightful closed-form expressions, is shown to play a chief role for SNR levels of practical interest.application/pdfeng© 2006 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./nThe final published article can be found at http://dx.doi.org/10.1109/TIT.2005.858937Ràdio -- AntenesTractament del senyalRàdio -- Interferènciesinfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1109/TIT.2005.858937Channel capacityMultiantenna arraysHigh-SNR analysisFading channelsAntenna correlationRicean channelsCoherent communicationinfo:eu-repo/semantics/openAccess