Title :
Robust Doppler spread estimation in nonisotropic fading channels
Author :
Baddour, Kareem E. ; Beaulieu, Norman C.
Author_Institution :
Dept. of Electr. & Comput. Eng., Queen´´s Univ., Canada
Abstract :
A new parametric approach is proposed for the estimation of the maximum Doppler frequency, or equivalently the mobile speed, in narrowband mobile radio channels. In this work, simple and efficient Doppler-frequency estimators are formulated based on using a small number of samples of the channel autocorrelation function. Unlike previous approaches, the chosen parameterization is shown to be robust in a microcellular propagation environment, which may be characterized by nonisotropic scattering and/or a specular component of unknown strength. Simulation results are described to illustrate the effects of additive noise and the finite data-record performance.
Keywords :
channel estimation; fading channels; frequency estimation; mobile radio; Doppler spread estimation; additive noise; channel autocorrelation function; finite data-record; maximum Doppler frequency estimation; microcellular propagation environment; mobile radio channels; nonisotropic fading channels; Autocorrelation; Fading; Frequency estimation; Land mobile radio; Narrowband; Rayleigh scattering; Rician channels; Robustness; Scattering parameters; Scholarships; Fading channels; Rician channels; maximum Doppler frequency; nonisotropic scattering; parameter estimation;
Journal_Title :
Wireless Communications, IEEE Transactions on
DOI :
10.1109/TWC.2005.858362
