Patent ID: 7167123
Filing Date: 2007-01-23
Classification: G01S,G01V

Abstract:
1. A method of determining a presence of an object associated with a target, the method comprising the steps of: illuminating a target with polarized illuminating radiation; collecting first radiation reflected from the target which has a same polarization as the illuminating radiation; collecting second radiation reflected from the target which has an opposite polarization from the illuminating radiation; and employing a weighted plurality of criteria of the first radiation and the second radiation converted to a time domain by a Chirp-Z Transform process to determine the presence of the object, the criteria selected from the group consisting of a first magnitude of the first radiation at zero time after conversion to the time domain by the Chirp-Z Transform process, a second magnitude of the second radiation at zero time after conversion to the time domain by the Chirp-Z Transform process, and a difference between the first magnitude and the second magnitude; and employing a time of arrival difference between the first radiation and the second radiation.