Patent ID: 6198429
Filing Date: 2001-03-06
Classification: G01S

Abstract:
A radar or like system comprising:an image memory for storing signals defined in a Cartesian coordinate system which are converted from corresponding signals defined in a polar coordinate system;write data generating means for performing correlation operation on the data having been stored in said image memory means and fresh input data and for rewriting resultant correlation signals in the same memory elements of the image memory means for rotations of the antenna; andlast sample detecting means for judging whether a pixel to which a sample point i on a first sweep line is allocated does not coincide with any of the pixels to which a plurality of adjacent sample points on the first sweep line .theta..sub.n-1 and a second sweep line .theta..sub.n are allocated and for determining the sample point i as the last sample point if they are not coincident with each other;said write data generating means uses, when a sample point i is judged as the last sample point for a pixel, data having been obtained at the sample point i as the fresh input data.