ALGORITHM FOR RADAR COORDINATE CONVERSION IN DIGITAL SCAN CONVERTERS

摘要

ABSTRACTDisclosed is a system for high speed conversion ofradar formats from polar coordinates to cartesian coordinates.From an initial address Xi Yi where a radar pulse crosses adisplay, subsequent addresses are determined by addingconstant values sin .theta.i and cos .theta.i to Xi and Yi. This isfaster than the prior method of calculating Xi and Yi bymultiplying Ri (range) by sin .theta.i and cos .theta.i. Also disclosedis a system for filling the display between adjacent radialsat long ranges where spoking of the display tends to occur.This is done by adding constant increments to one cartesianvalue on one vector until the next vector is reached whilemaintaining the other cartesian value constant.