Spatially variant apodization

Details Spatially variant apodization Spatially variant apodization

1993-05-10

1994-09-20

Hellner, Mark

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

With particular circuit

Digital processing

342196, G01S 1389

Patent

active

053493591

ABSTRACT:
Spatially variant apodization is a digital image processing technique for eliminating sidelobes produced by Fourier transform of finite data sequences without compromising mainlobe width. This process allows each sample or pixel in an image to receive its own frequency domain aperture amplitude weighting function from an infinite number of possible weighting functions. In its simplest form the weight is a function of the negative of the current sample divided by the sum of the neighboring samples, and the function is limited to a predetermined range such as the range between zero and one half.

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patent: 5122805 (1992-06-01), Peterman et al.
patent: 5173706 (1992-12-01), Urkowitz

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