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

fYear

1991

fDate

14-17 Apr 1991

Firstpage

1293

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 P_TD&L to P_FD and P_TD to P_FD 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;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 1991. ICASSP-91., 1991 International Conference on

Conference_Location

Toronto, Ont.

ISSN

1520-6149

Print_ISBN

0-7803-0003-3

Type

conf

DOI

10.1109/ICASSP.1991.150637

Filename

150637