Rusek, FredrikLozano Solsona, AngelJindal, Nihar2013-03-222013-03-222012Rusek F, Lozano A, Jindal N. Mutual information of IID complex Gaussian signals on block Rayleigh-faded channels. IEEE Trans Inf Theory. 2012; 58(1): p.331-340. DOI 10.1109/TIT.2011.21715200018-9448http://hdl.handle.net/10230/20518We present a method to compute, quickly and efficiently, the mutual information achieved by an IID (independent identically distributed) complex Gaussian signal on a block Rayleigh-faded channel without side information at the receiver. The method accommodates both scalar and MIMO (multiple-input multiple-output) settings. Operationally, this mutual information represents the highest spectral efficiency that can be attained using Gaussian/ncodebooks. Examples are provided that illustrate the loss in spectral efficiency caused by fast fading and how that loss is amplified when multiple transmit antennas are used. These examples are further enriched by comparisons with the channel capacity under perfect channel-state information at the receiver, and with the spectral efficiency attained by pilot-based transmission.application/pdfeng© 2012 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://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=6121994&tag=1Ràdio -- AntenesComunicació sense fil, Sistemes deTractament del senyalinfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1109/TIT.2011.2171520Wireless communicationsMutual informationMIMOMultiantennaNon-coherent spectral efficiencyinfo:eu-repo/semantics/openAccess