Fast range and Doppler estimation for narrowband active sonar

Author

Dooley, Saul R. ; Nandi, Asoke K.

Author_Institution

Dept. of Electron. & Electr. Eng., Strathclyde Univ., Glasgow, UK

Volume

5

fYear

1999

fDate

1999

Firstpage

2809

Abstract

We present a computationally simple algorithm suitable for fast, high resolution estimation of time delays and Doppler shifts (which are necessary for target localization and tracking) between narrowband signals in an active sonar system. The algorithm uses a modulated Lagrange interpolation filter and an LMS-type algorithm. The problem of delay and Doppler estimation is reduced to a linear regression problem. Convergence and performance analysis of the method is studied both analytically and through simulation. It is demonstrated that the method provides estimates close to the Cramer-Rao lower bound

Keywords

Doppler shift; convergence of numerical methods; delay estimation; filtering theory; interpolation; least mean squares methods; parameter estimation; signal resolution; sonar signal processing; statistical analysis; time series; Cramer-Rao lower bound; Doppler shifts; LMS-type algorithm; computationally simple algorithm; convergence; delay estimates; differential frequency offset; differential time delay; fast Doppler estimation; fast range estimation; high resolution estimation; linear regression problem; modulated Lagrange interpolation filter; narrowband active sonar system; narrowband signals; performance analysis; simulation; target localization; time delays; time series; Delay effects; Delay estimation; Doppler shift; Interpolation; Lagrangian functions; Narrowband; Performance analysis; Signal resolution; Sonar; Target tracking;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 1999. Proceedings., 1999 IEEE International Conference on

Conference_Location

Phoenix, AZ

ISSN

1520-6149

Print_ISBN

0-7803-5041-3

Type

conf

DOI

10.1109/ICASSP.1999.761346

Filename

761346