Super spatially variant apodization (Super - SVA)

Details Super spatially variant apodization (Super - SVA) Super spatially variant apodization (Super - SVA)

1996-08-06

1997-11-11

Blum, Theodore M.

Communications: directive radio wave systems and devices (e.g.,

With particular circuit

Digital processing

342195, 342379, 364576, 324 7621, G01S 1300

Patent

active

056869223

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.

REFERENCES:
patent: 4797923 (1989-01-01), Clarke
patent: 5122732 (1992-06-01), Engeler et al.
patent: 5349359 (1994-09-01), Dallaire et al.
patent: 5361072 (1994-11-01), Barrick et al.

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