NDLI: Time varying channel modeling for ad-hoc mobile wireless networks

Content Provider	IEEE Xplore Digital Library
Author	Olama, M.M. Djouadi, S.M. Charalambous, C.D.
Copyright Year	2006
Description	Author affiliation: Dept. of ECE, Tennessee Univ., Knoxville, TN (Olama, M.M.; Djouadi, S.M.)
Abstract	Due to node mobility and environmental changes in mobile ad-hoc networks, the ad-hoc channel is time varying and subject to fading. As a consequence of these variations, the statistical characteristics of the received signal vary continuously, giving rise to a Doppler power spectral density (DPSD) which varies from one observation instant to the next. As a result, the traditional models can no longer capture and track complex time variations in the propagation environment. These time variations compel us to introduce more advanced dynamical models in order to capture higher order dynamics of the ad-hoc channel. A stochastic ad-hoc short term fading channel model, in which the evolution of the dynamical channel is described by a stochastic state space representation, is derived. The parameters of the stochastic state space model are determined by approximating the band limited DPSD. Inphase and quadrature components of the ad-hoc channel are derived. Numerical results show that link performance for ad-hoc case is worse than cellular case, but the performance gap shrinks with increased mobility
Starting Page	1277
Ending Page	1282
File Size	255565
Page Count	6
File Format	PDF
ISBN	1424402697
ISSN	15253511
e-ISBN	1424402700
DOI	10.1109/WCNC.2006.1696470
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-04-03
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Wireless networks Fading Stochastic processes Physical layer State-space methods Network topology Access protocols Open systems Spread spectrum communication Scattering
Content Type	Text
Resource Type	Article

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