Eigendecomposition of the Multi-Channel Covariance Matrix With Applications to SAR-GMTI

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Authors
  1. Sikaneta, I.C.
  2. Chouinard, J-Y.
Corporate Authors
Defence R&D Canada - Ottawa, Ottawa ONT (CAN)
Abstract
This paper investigates ground moving target indication using a multiaperture synthetic aperture radar. Target detectors based on an eigendecomposition of the multi-channel covariance matrix are presented. Comparisons of the proposed detectors with classical methods, such as displaced phase centre antenna, or along track interferometry, show increased capability in heterogeneous terrain. By decomposing the complex Wishart probability distribution of the sample covariance matrix into probability distributions of the eigenvalues and eigenvectors, we calculate the probability of moving target detection vs the signal to clutter plus noise ratio for a fixed false alarm rate in homogeneous and heterogeneous terrain. The probability distributions allow implementation of a constant false alarm rate detector. The complete analysis is presented for a two-channel system.
Keywords
GMTI (Ground Moving Target Indicator)
Date of publication
06 Mar 2004
Number of Pages
36
Reprinted from
Signal Processing, vol 84, 2004, p 1501-1535
DSTKIM No
CA024584
CANDIS No
522240
Format(s):
Hardcopy;Document Image stored on Optical Disk

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