Patent ID: 6255991
Filing Date: 2001-07-03
Classification: G01S,H01Q

Abstract:
A system for determining angle of arrival measurements of a signal, said system comprising:a plurality of interferometer antenna elements spaced apart from each other a predetermined distance and receiving the signal, said plurality of interferometer antenna elements being greater in number than two antenna elements;a first switching network coupled to the plurality of interferometer antenna elements;two interferometer receivers coupled to the first switching network, said first switching network selectively directing the received signal from two selected interferometer antenna elements to the two interferometer receivers in a sequential manner so that several pairs of the interferometer antenna elements are separately directed to the two interferometer receivers; anda controller coupled to the interferometer receivers and determining a phase difference between measured phase differences of the two selected interferometer antenna elements, said controller subtracting a predicted phase difference from the determined phase difference to generate a nominal phase difference.