Title :
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
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;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1999. Proceedings., 1999 IEEE International Conference on
Conference_Location :
Phoenix, AZ
Print_ISBN :
0-7803-5041-3
DOI :
10.1109/ICASSP.1999.761346
