Title :
An algorithm for detecting closely spaced delay/Doppler components
Author :
Habboosh, Amir W. ; Vaccaro, Richard J. ; Kay, Steven
Author_Institution :
Naval Underwater Syst. Center, Newport, RI, USA
Abstract :
This paper considers a method for estimating time delays, amplitudes, and Doppler scales of a multipath signal. The method is an extension of work previously reported by Manickam and Vaccaro (1993) which dealt solely with time delays and amplitudes, and extended by Habboosh and Vaccaro (see Proceedings CISS ´96, p.633-8, 1996) to include Doppler scale. An algorithm is presented for determining the size of the indicator set to reduce ill-conditioning of the signal subspace matrix. Simulation results are shown and comparisons to the Cramer-Rao lower bound provided; these results show that significant reduction in estimate variances can be achieved using the deconvolution approach with a properly selected indicator set
Keywords :
Doppler effect; amplitude estimation; deconvolution; delays; matrix algebra; multipath channels; signal detection; Cramer-Rao lower bound; Doppler scales; algorithm; amplitude estimation; closely spaced delay/Doppler components detection; deconvolution; estimate variances; ill-conditioning reduction; indicator set size; multipath signal; signal subspace matrix; simulation results; time delay estimation; Amplitude estimation; Attenuation; Autocorrelation; Bandwidth; Deconvolution; Delay effects; Delay estimation; Frequency; Gaussian noise; Narrowband;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1997. ICASSP-97., 1997 IEEE International Conference on
Conference_Location :
Munich
Print_ISBN :
0-8186-7919-0
DOI :
10.1109/ICASSP.1997.599693
