Robust Doppler spread estimation in nonisotropic fading channels |
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Authors: | Baddour KE Beaulieu NC |
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Affiliation: | Dept. of Electr. & Comput. Eng., Queen's Univ., Canada; |
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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. |
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