NDLI: Time varying stochastic channel modeling of wireless DS-CDMA ad-hoc networks using different mobility models

Content Provider	IEEE Xplore Digital Library
Author	Al Zaman Sharmin, T. Khan, A. Ferdjallah, M.
Copyright Year	2007
Description	Author affiliation: Dept. of Electr. & Comput. Eng., Tennessee Univ., Knoxville, TN (Al Zaman; Sharmin, T.; Khan, A.; Ferdjallah, M.)
Abstract	The time varying nodes mobility and environmental changes in traditional ad-hoc channel creates limitation in signal propagation. In this study, a stochastic dynamic ad-hoc channel model is introduced with state space representation to overcome these limitations. The model's parameters are computed from the approximation of Doppler spectrum. The performance of this stochastic ad-hoc direct sequence spread spectrum (DS-CDMA) wireless network in a flat fading channel is also investigated in this article. It is documented that the shape of the Doppler spectrum in a cellular network is considerably different than that of an ad-hoc network because of double mobility and speed. In this paper, the performance in terms of capacity and bit error rate (BER) under varying degrees of double mobility is demonstrated using simulation technique for stochastic ad-hoc model. As the degree of double mobility increases when the maximum Doppler shift is fixed, we observe that the capacity (number of users that can be supported) of DS-CDMA ad-hoc networks is higher than that of cellular networks because double mobility mitigates fading.
Starting Page	35
Ending Page	40
File Size	711456
Page Count	6
File Format	PDF
ISBN	1424410282
DOI	10.1109/SECON.2007.342849
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-03-22
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Stochastic processes Multiaccess communication Ad hoc networks Fading Land mobile radio cellular systems Bit error rate State-space methods Spread spectrum communication Wireless networks Shape
Content Type	Text
Resource Type	Article

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