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Proceedings of 1994 28th Asilomar Conference on Signals, Systems and Computers (1994)
Pacific Grove, CA, USA
Oct. 31, 1994 to Nov. 2, 1994
ISSN: 1058-6393
ISBN: 0-8186-6405-3
pp: 1501-1505
H.C. So , Dept. of Electron. Eng., Chinese Univ. of Hong Kong, Shatin, Hong Kong
P.C. Ching , Dept. of Electron. Eng., Chinese Univ. of Hong Kong, Shatin, Hong Kong
ABSTRACT
The performance of two adaptive TDE systems, namely, the least mean square time delay estimator (LMSTDE) and the explicit time delay estimator (ETDE) are compared when the delay is linearly time-varied. While the (LMSTDE) interpolates filter coefficients to determine the time difference of a signal received at two separated sensors, the ETDE adapts and tracks the time delay explicitly. The convergence dynamics of these two approaches are analyzed when the delay is a linearly time-varying function due to relative motion between the signal source and the receivers. The merits of these methods in terms of parameter estimation and computational load are discussed. Simulation results show that the ETDE outperforms the LMSTDE for delay and Doppler estimation and its performance is comparable to the CRLB under noisy environment.<>
INDEX TERMS
array signal processing, delays, Doppler effect, convergence of numerical methods, parameter estimation, least mean squares methods, filtering theory, interpolation, adaptive filters, adaptive signal processing, tracking
CITATION

H. So and P. Ching, "Comparative performance of LMSTDE and ETDE for delay and Doppler estimation," Proceedings of 1994 28th Asilomar Conference on Signals, Systems and Computers(ACSSC), Pacific Grove, CA, USA, 1995, pp. 1501-1505.
doi:10.1109/ACSSC.1994.471708
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