Communications: directive radio wave systems and devices (e.g. – Synthetic aperture radar
Patent
1998-07-02
2000-08-01
Sotomayor, John B.
Communications: directive radio wave systems and devices (e.g.,
Synthetic aperture radar
342159, 342195, G01S 1390
Patent
active
060973285
ABSTRACT:
A family of multiple scale adaptive filters and filtering methods that automatically adapt their impulse response width to local data characteristics, optimizing the accuracy, yield, and/or detail of interferometric measurements. A prefilter with fixed impulse response width is applied to a complex interferogram. The phase of the prefiltered complex interferogram is unwrapped. Then, a weighted combination of the phase-unwrapped, fixed-filtered interferograms is computed using a data-dependent criterion function. The resulting weighting function at each resolution element is typically a nonlinear function of interferogram magnitude and coherence for each fixed filter output at that resolution element.
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Alkov Leonard A.
Lenzen, Jr. Glenn H.
Raytheon Company
Sotomayor John B.
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