Title :
IQML algorithm for multiple signal parameter estimation
Author :
Chotikakamthorn, N. ; Chambers, J.A.
Author_Institution :
Imperial Coll. of Sci., Technol. & Med., London, UK
fDate :
10/1/1997 12:00:00 AM
Abstract :
The problems of one-dimensional and two-dimensional (1-D and 2-D) parameter estimation based on the iterative quadratic maximum likelihood (IQML) algorithm are considered. For the 1-D frequency or source direction estimation problem, the inefficiency of two existing versions of the algorithm is addressed. An improved algorithm is obtained by using a new consistent nontriviality constraint. In addition, the IQML algorithm is applied to solve the 2-D frequency estimation problem. Given the estimates of 1-D frequency parameters in each of the two dimensions, a sufficient condition for consistent parameter pairing is provided. Numerical results are given to demonstrate the improvement gained by the proposed work
Keywords :
array signal processing; direction-of-arrival estimation; frequency estimation; iterative methods; maximum likelihood estimation; signal resolution; 1D frequency estimation; 1D frequency parameters; 1D parameter estimation; 2D frequency estimation; 2D parameter estimation; IQML algorithm; consistent nontriviality constraint; consistent parameter pairing; high resolution techniques; improved algorithm; iterative quadratic maximum likelihood; multiple signal parameter estimation; numerical results; source direction estimation; sufficient condition;
Journal_Title :
Radar, Sonar and Navigation, IEE Proceedings -
DOI :
10.1049/ip-rsn:19971322
