Title :
Analysis of wide-band cross-correlation for target detection and time delay estimation
Author :
Bar-Shalom, Y. ; Palmieri, F. ; Kumar, A. ; Shertukde, H.M.
Author_Institution :
Connecticut Univ., Storrs, CT, USA
Abstract :
The problem of target track detection and time delay estimation using cross-correlation of wideband signals has been analyzed. The concepts of target detection and (accurate) localization (TD&L), target detection (TD, with a possibly smeared measurement), and false detection (FD), have been defined in terms of resolution cell exceedances. Receiver operating curves relating to PTD&L to PFD and PTD to PFD have been presented. A generalized maximum likelihood estimate of the time delay based on the main peak and spillover cells of the cross-correlation has been presented. The accuracy of this estimate has been derived using the Cramer-Rao lower bound in terms of the resolution cell, signal-to-noise ratio (SNR), and the number of samples per observation interval. This accuracy has been verified via simulations for SNR as low as -6 dB for a 128-sample window
Keywords :
correlation methods; delays; signal processing; statistical analysis; Cramer-Rao lower bound; ROC; detection probabilities; false detection; main peak; maximum likelihood estimate; observation interval; receiver operating curves; resolution cell exceedances; signal processing; signal-to-noise ratio; smeared measurement; spillover cells; statistical analysis; target detection; time delay estimation; wide-band cross-correlation; Delay effects; Delay estimation; Maximum likelihood detection; Maximum likelihood estimation; Object detection; Signal analysis; Signal resolution; Signal to noise ratio; Target tracking; Wideband;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1991. ICASSP-91., 1991 International Conference on
Conference_Location :
Toronto, Ont.
Print_ISBN :
0-7803-0003-3
DOI :
10.1109/ICASSP.1991.150637
