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Title:	Interplay of spectral efficiency, power and doppler spectrum for reference-signal-assisted wireless communication
Author:	Lozano Solsona, Angel
Abstract:	Expressions relating spectral efficiency, power, and Doppler spectrum, are derived for Rayleigh-faded wireless channels with Gaussian signal transmission. No side information on the state of the channel is assumed at the receiver. Rather, periodic reference signals are postulated in accordance with the functioning of most wireless systems. The analysis relies on a well-established lower bound, generally tight and asymptotically /nexact at low SNR. In contrast with most previous studies, which relied on block-fading channel /nmodels, a continuous-fading model is adopted. This embeds the Doppler spectrum directly in the derived expressions, imbuing them with practical significance. /nClosed-form relationships are obtained for the popular Clarke-Jakes spectrum and informative expansions, valid for arbitrary spectra, are found for the low- and high-power regimes. While the paper focuses on scalar channels, the extension to multiantenna settings is also discussed.
Subject(s):	-Doppler, Efecte -Comunicació sense fil, Sistemes de -Ràdio Antenes -Tractament del senyal -Rayleigh Fading -Mutual Information -Channel Estimation -Doppler Spectrum -Spectral Efficiency
Rights:	© 2008 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/T-WC.2008.070873
Document type:	Article Article - Accepted version
Published by:	Institute of Electrical and Electronics Engineers (IEEE)
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