Algorithm for radar coordinate conversion in digital scan conver

Details Algorithm for radar coordinate conversion in digital scan conver Algorithm for radar coordinate conversion in digital scan conver

1983-07-01

1987-09-29

Tubbesing, T. H.

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

With particular circuit

Display

364731, G01S 744

Patent

active

046971858

ABSTRACT:
Disclosed is a system for high speed conversion of radar formats from polar coordinates to cartesian coordinates. From an initial address X.sub.i Y.sub.i where a radar pulse crosses a display, subsequent addresses are determined by adding constant values sin .theta..sub.i and cos .theta..sub.i to X.sub.i and Y.sub.i. This is faster than the prior method of calculating x.sub.i and Y.sub.i by multiplying R.sub.i (range) by sin .theta..sub.i and cos .theta..sub.i. Also disclosed is a system for filling the display between adjacent radials at long ranges where spoking of the display tends to occur. This is done by adding constant increments to one cartesian value on one vector until the next vector is reached while maintaining the other cartesian value constant.

REFERENCES:
patent: 3671723 (1972-06-01), Deligniers et al.
patent: 4106021 (1978-08-01), Katagi
patent: 4275415 (1981-06-01), Engle
patent: 4547803 (1985-10-01), Richards

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