Title :
A subspace framework for fast parameter estimation with known waveforms
Author :
Freburger, B.E. ; Tufts, D.W. ; Palka, T.A.
Author_Institution :
Dept. of Electr. Eng., Rhode Island Univ., Kingston, RI, USA
Abstract :
An efficient scheme for implementing a search of a likelihood function of known form at moderate to high SNR is constructed. Often, the original function to be searched is ill behaved with many local extreme points. By projecting the signal onto a subspace of replica waveforms we first find the maximum of a related function that is more well behaved, and then follow with a local search on the original function. The approach builds on a method of estimation of the time delay of a narrowband signal, and it can be used to improve the efficiency of fast maximum likelihood estimation
Keywords :
delays; maximum likelihood estimation; search problems; signal processing; waveform analysis; SNR; efficiency; fast maximum likelihood estimation; fast parameter estimation; likelihood function; local search; narrowband signal; projection subspace; replica waveforms; search method; signal model; subspace framework; time delay estimation; waveforms; Additive noise; Aircraft; Delay effects; Delay estimation; Gaussian noise; Least squares approximation; Maximum likelihood estimation; Multidimensional systems; Parameter estimation; Vectors;
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.1997.599697
