Patent ID: 6839025
Filing Date: 2005-01-04
Classification: G01S

Abstract:
1. A sensing system with direction finding capabilities, the system comprising: a phased array that utilizes an amplitude direction finding scheme, said phased array sensing having at least two receiver antennas for receiving a received signal from a first object; at least one processor in communication with the phased array sensing, the processor executing an amplitude direction finding technique module executing on the processor, the amplitude direction finding technique module producing amplitude direction finding technique data from the received signal, the amplitude direction finding technique data indicative of the course direction of the first object and an interferometric technique module to produce interferometric technique data from the received signal, the interferometric technique data indicative of a more precise direction of the first object than provided by the amplitude direction finding technique; and a direction finding module executing on the processor, the direction finding module determining direction finding data of the first object based on a residual phase error of the interferometric technique data and on an amplitude direction finding error of the amplitude direction finding technique data.