Raytheon Company

George A Bouchard

Arthur J Torino, Jr

Jeffrey E Carmella

Philip A Keane

Robert W Hazard

Michael P DeMilia

A system for obtaining digitized samples of an analog signal at a selectable rate, R. The system includes: a timing generator for producing a train of sampling pulses at a predetermined sampling rate, f.sub.s ; an analog to digital converter for producing a digitized sample of the analog signal in response to each one of the sampling pulses; a processor; and, a selector, for passing each Nth one of the digitized samples produced by the analog to digital converter, where N=f.sub.s /R to the processor. The selector includes a decimator, responsive to a signal, N=f.sub.s /R, representative of the ratio of the sampling rate, f.sub.s, to the digitized signal obtaining rate, R, for producing pulses at the rate, R=f.sub.s /N; and, a register for storing each Nth one of the digitized samples produced by the analog to digital converter, each one of such digitized samples being stored in response to a corresponding one of the pulses produced by the decimator. A radar system is provided wherein range cells signals of the video signals produced in response to a train of transmitted pulses are obtained at a rate, R, related to the range cell resolution selected by the radar system. An analog to digital conversion system is fed by the video signal. The analog to digital conversion system includes: a timing generator for producing a train of sampling pulses at a predetermined sampling rate, f.sub.s ; an analog to digital converter for producing a digitized samples of the analog signal in response to each one of the sapling pulses; and, a processor section for processing each Nth one of the digitized samples produced by the analog to digital converter.

Analog to digital conversion system

A method of producing a control signal for a range gate in a pulse Doppler radar, the method encompassing the steps of periodically determining the range slip of a selected target and then changing the position of a range gate during each range sweep in accordance with the determined range slip.

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Arlington, MA, United States of America

George A Bouchard