Radio channel modeling for mobile ad hoc wireless networks
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Authors
Sng, Sin Hie
Subjects
Ad hoc wireless networks
Rayleigh and Rician distribution
MATLAB
Mobile radio channel
Tapped delay line
Doppler shift
Jakes power spectrum
Multipath and fading
Rayleigh and Rician distribution
MATLAB
Mobile radio channel
Tapped delay line
Doppler shift
Jakes power spectrum
Multipath and fading
Advisors
Tummala, Murali
Cristi, Roberto
Date of Issue
2004-06
Date
June 2004
Publisher
Monterey California. Naval Postgraduate School
Language
Abstract
The radio channel places fundamental limitations on the performance of mobile ad hoc wireless networks. In the mobile radio environment, fading due to multipath delay spread impairs received signals. The purpose of this thesis is to develop a radio channel model and examine the effect of various parameters on channel behavior that is representative of environments in which mobile ad hoc wireless networks operate. The various physical phenomena considered are outdoor environments, fading and multipath propagation, type of terrains, and mobility (Doppler shift). A channel model based on a Tapped Delay Line (TDL) structure was developed and implemented in the MATLAB programming language, and the performance of the time-varying channel was studied by plotting the signal constellations. The simulation results indicate that the number of taps required in the TDL is 8 or less and the carrier frequency did not influence the performance significantly. The Jakes Doppler spectrum should be used in urban environments with high mobility; the Gaussian Doppler spectrum is the choice for low mobility urban environments and for the hilly terrain under both low and high mobility.
Type
Thesis
Description
Series/Report No
Department
Department of Electrical and Computer Engineering
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Funder
Format
xvi, 73 p. : ill. (some col.)
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
Copyright is reserved by the copyright owner