Ghogho, M. and Swami, A. and Durrani, T.S. (2001) Frequency estimation in the presence of Doppler spread: performance analysis. IEEE Transactions on Signal Processing, 49 (4). pp. 777-789. ISSN 1053-587XFull text not available in this repository. (Request a copy from the Strathclyde author)
We are concerned with the estimation of the frequency of a complex sinusoid that has been corrupted by complex-valued multiplicative and additive noise. This problem is important in many applications including array processing in the case of spatially distributed sources and synchronization in the context of time-selective channels. The multiplicative noise smears the spectral line due to the sinusoid. This smearing, which is often called Doppler spreading, may significantly degrade the estimation accuracy. The goal of this paper is to analytically assess this degradation. The finite-sample Cramer-Rao bounds (CRBs) are derived, and closed-form expressions are given for the large-sample CRB. The latter gives insights into the effective coherent and noncoherent SNRs for frequency estimation. We then analyze the accuracy of frequency estimators that are based on the angles of the sample covariances. Simulations results are presented to illustrate the theoretical results.
|Keywords:||Doppler effect, array signal processing, covariance analysis mobile radio, signal sampling, synchronisation, white noise, Electrical engineering. Electronics Nuclear engineering, Signal Processing, Electrical and Electronic Engineering|
|Subjects:||Technology > Electrical engineering. Electronics Nuclear engineering|
|Department:||Faculty of Engineering > Electronic and Electrical Engineering|
|Depositing user:||Strathprints Administrator|
|Date Deposited:||18 Jun 2007|
|Last modified:||27 May 2016 02:02|