Title: Radar system having quadrature phase detector compensator

Abstract: Method and apparatus are disclosed for correcting amplitude and phase imbalances between the "in phase" and "quadrature" channels of a digital signal processor by determining a correction coefficient from a test signal periodically introduced into the quadrature phase detector of a radar system. The frequency spectrum of the signal at the output of the phase detector in response to each such test signal is utilized to produce a correction coefficient for application to radar return signals passing through the phase detector during normal radar operation, thereby providing true quadrature radar return signals for digital processing.

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Inventors: Churchill, Frederick E. (Carlisle, MA, US)
Ogar, George W. (Wakefield, MA, US)
Thompson, Bernard J. (Concord, MA, US)

Application Number: 511552
Filing Date: 1974-10-03
Publication_date: 1976-04-13
Assignee: Raytheon Company (Lexington, MA)
Primary Class(es): 342/174 342/194, 342/196
Other Classes:
US Patent Ref:

3794998	Feb, 1974	Pearso, Jr. et al.	343/17.
3883870	May, 1975	Kunz	343/17.

Other Refs:
Primary Examiner: Tubbesing, T. H.
Assistant Examiner:
Attorney: Sharkansky; Richard M., McFarland; Philip J., Pannone; Joseph D.