US 5,686,922 A · Super spatially variant apodization (Super

Abstract

In systems wherein signal compression is performed using matched filters or transforms, as in the case of radar, multiple extrapolations are used to resolve beyond the limits of defraction. In one example, development of the method begins with a complex, uniformly weighted SAR or inverse SAR signal represented by a rectangle function. After performing an FFT, adaptive sidelobe reduction is carried out followed by an inverse weighting and truncation, after which the original signal is used to replace the center portion of the extrapolated signal. The signal is again transformed and sidelobe reduced, and inverse weighting and truncation are again performed, followed by the original data replacement step. The extrapolation procedure may be repeated end times, extrapolating each time by a factor K for a total extrapolation factor of K=k.sup.n.

Claims21

Dependent claims

A method of super-resolving a signal, comprising the steps of:

a) receiving an original, information-carrying signal;
b) performing a numerical transformation on the signal, resulting in a signal having a main lobe and sidelobes;
c) reducing the sidelobes;
d) performing an inverse of the numerical transformation on the sidelobe-reduced signal;
e) applying an inverse weighting and truncation to the signal obtained in step d);
f) replacing the center portion of the signal obtained in step e) with the original signal;
and
g) repeating steps b) through f).

5 more elements

Dependencies are inferred from the claim text.

Super spatially variant apodization (Super - SVA)

Life of this patent

Super spatially variant apodization (Super - SVA)

Life of this patent

Abstract

Claims21