Patent ID: 7474262
Filing Date: 2009-01-06
Classification: G01S,H01Q,H04B

Abstract:
1. An electronically scanned radar system comprising: a predetermined number of antenna elements for transmitting a received signal to a receiver; a digital beam former performing a digital beamforming function for controlling sensitivity of the antenna elements; a time multiplexed switch matrix for timing the transmission of the received signal from the antenna elements to the receiver; and a Doppler function for managing a target motion induced phase shift across the antenna elements with the digital beam former, wherein the Doppler function is performed on the received signal prior to the digital beamforming function, and the Doppler function comprises a Doppler frequency filter followed by a Doppler compensation function, wherein the Doppler frequency filter differentiates between a multiple number of the received signals, the Doppler compensation function compensates for the target motion induced phase shift for a center frequency of a particular Doppler frequency filter, and the Doppler compensation function and the digital beamforming function are performed separately.