TY - GEN
T1 - Time varying channel modeling for ad-hoc mobile wireless networks
AU - Olama, M. M.
AU - Djouadi, S. M.
AU - Charalambous, C. D.
PY - 2006
Y1 - 2006
N2 - Due to nodes 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.
AB - Due to nodes 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.
UR - http://www.scopus.com/inward/record.url?scp=34250319379&partnerID=8YFLogxK
U2 - 10.1109/wcnc.2006.1696470
DO - 10.1109/wcnc.2006.1696470
M3 - Conference contribution
AN - SCOPUS:34250319379
SN - 1424402700
SN - 9781424402700
T3 - IEEE Wireless Communications and Networking Conference, WCNC
SP - 1277
EP - 1282
BT - 2006 IEEE Wireless Communications and Networking Conference, WCNC 2006
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2006 IEEE Wireless Communications and Networking Conference, WCNC 2006
Y2 - 3 April 2006 through 6 April 2006
ER -