Patent Document ID: 20150035696
Application ID: 13958240
Patent Status: 0

Claim One:
1. A method for determining an angle of arrival of a radar signal received from an emitter, the method comprising; in a radar receiver system, given a radiation pattern of an antenna receiving a radar signal from an emitter, in an initial iteration, representing an approximation of the pattern as plurality of windows, each window defined by two boundaries and each of the boundaries having an azimuth angle value and an amplitude value, the approximation further includes an inflexion point being a boundary having an amplitude value higher than the other boundaries; for each of the boundaries, adjusting at least one of a respective azimuth angle value or amplitude value of a subject boundary; generating a next approximation of the pattern based on the adjustment to the subject boundary; comparing the next approximation to an approximation of the pattern generated in a prior iteration, which includes the initial approximation; comparing a slope associated with a portion of the next approximation represented by each window to a non-zero threshold value; determining whether the next approximation is constantly increasing on one side of the inflexion point and constantly decreasing on the other side of the inflexion point; identifying the next approximation as an optimized monotonic fit—based on the comparisons and determination; and calculating an angle of arrival of the radar signal received from the emitter based on the optimized monotonic fit.