Time Delay Estimator Based on Frequency Estimation Approach

Kenneth Wing Kin LUI  Hing Cheung SO  

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E93-A    No.6    pp.1248-1250
Publication Date: 2010/06/01
Online ISSN: 1745-1337
DOI: 10.1587/transfun.E93.A.1248
Print ISSN: 0916-8508
Type of Manuscript: LETTER
Category: Digital Signal Processing
time delay estimation,  frequency estimation,  

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In this Letter, the problem of estimating the time-difference-of-arrival between signals received at two spatially separated sensors is addressed. By taking discrete Fourier transform of the sensor outputs, time delay estimation corresponds to finding the frequency of a noisy sinusoid with time-varying amplitude. The generalized weighted linear predictor is utilized to estimate the time delay and it is shown that its estimation accuracy attains Cramér-Rao lower bound.