Estimation of frequencies and damping factors by two-dimensional ESPRIT type methods

Author

Rouquette, Stephanie ; Najim, Mohamed

Author_Institution

CNRS, Paris, France

Volume

49

Issue

1

fYear

2001

fDate

1/1/2001 12:00:00 AM

Firstpage

237

Lastpage

245

Abstract

In this paper, we consider two-dimensional (2-D) signals modeled by the sum of damped cisoids. We propose two high-resolution approaches to estimate their frequencies and damping factors. Both high-resolution methods are based on the shift-invariance structure of the signal subspace related to each dimension. The first one estimates the frequency components in both dimensions as in the matrix enhancement and matrix pencil (MEMP) method before pairing them with a new algorithm. The second one consists of the direct estimation of the signal frequency pairs without an additional step to pair the frequencies related to each dimension. We show how these methods can estimate the scattering points of radar images

Keywords

frequency estimation; matrix algebra; multidimensional signal processing; radar imaging; radar resolution; 2-D signals; MEMP method; damped cisoids; damping factors; direct estimation; frequencies; frequency components; high-resolution approaches; matrix enhancement and matrix pencil method; radar images; scattering points; shift-invariance structure; signal frequency pairs; signal subspace; two-dimensional ESPRIT type methods; Damping; Frequency estimation; Magnetic resonance imaging; Matrix decomposition; Parameter estimation; Radar imaging; Radar scattering; Robustness; Signal processing algorithms; Two dimensional displays;

fLanguage

English

Journal_Title

Signal Processing, IEEE Transactions on

Publisher

ieee

ISSN

1053-587X

Type

jour

DOI

10.1109/78.890367

Filename

890367