Title :
Fast implementation of two-dimensional APES and CAPON spectral estimators
Author :
Larsson, Erik G. ; Stoica, Petre
Author_Institution :
Dept. of Syst. & Control, Uppsala Univ., Sweden
Abstract :
The matched-filterbank spectral estimators APES and CAPON have received considerable attention in a number of applications. Unfortunately, their computational complexity tends to limit their usage in several cases-a problem that has previously been addressed by different authors. In this paper, we introduce a novel method to the computation of the 1D and 2D APES and CAPON spectra, which is considerably faster than all existing techniques. Numerical examples are provided to demonstrate the application of APES to synthetic aperture radar (SAR) imaging, and to illustrate the reduction in computational complexity provided by our implementation
Keywords :
channel bank filters; computational complexity; filtering theory; matched filters; parameter estimation; radar imaging; spectral analysis; synthetic aperture radar; 1D APES spectra; 1D CAPON spectra; 2D APES spectral estimator; 2D Capon spectral estimator; SAR imaging; computational complexity reduction; fast implementation; matched-filterbank spectral estimators; synthetic aperture radar; two-dimensional APES spectral estimator; Amplitude estimation; Computational complexity; Computer applications; Control systems; Costs; Covariance matrix; Filters; Stability; Stacking; Synthetic aperture radar;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 2001. Proceedings. (ICASSP '01). 2001 IEEE International Conference on
Conference_Location :
Salt Lake City, UT
Print_ISBN :
0-7803-7041-4
DOI :
10.1109/ICASSP.2001.940306
