Patent ID: 6650271
Filing Date: 2003-11-18
Classification: G01S

Abstract:
A receiver, comprising:a plurality of elements adapted to receive an interfering signal from both a direct path and from an indirect path, such direct and indirect paths having both differential Doppler frequency and differential time delay induced phase shifts; a plurality of receiver sections, each one of the receiver sections being fed by a corresponding one of the elements; an adaptive interfering signal canceler fed by the plurality of receiver sections for providing a beam forming network to suppress both the direct and indirect paths of the interfering signal, such canceler separating the received signal into a plurality of sub-intervals, determining frequency components in each of the sub-intervals over a predetermined frequency bandwidth, forming a plurality of frequency sub-band beam forming networks from the frequency components for each of a corresponding one of the sub-intervals to suppress the differential time delay phase shifts in the received interfering signal, and producing a composite output signal from the plurality of frequency sub-band beam forming networks over the plurality of sub-intervals to suppress the differential Doppler frequency induced phase shifts in the received interfering signal.