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US 5,182,563 AGranted
Enhanced performance mode S interrogator
AssigneeWestinghouse Electric Corp.
InventorsHerman J. Blinchikoff, Ann C. Schofield
Life of this patent
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Abstract
An enhanced performance Mode S interrogator that includes a matched channel receiver. The receiver includes equiripple-phase response filters with finite peaks of attenuation. This new class of filters provides a faster rise of attenuation than all-pole filter while extending the equiripple delay further into the stopband.
Claims1
An enhanced performance Mode S interrogator for interrogating an aircraft and processing a reply, said interrogator comprising:
- a multi-pattern antenna;
- a multichannel monopulse transmitter, operatively coupled to said multi-pattern antenna for transmitting interrogation information;
- a monopulse receiver, operatively coupled to said multipatterned antenna for detecting pulses representing the reply, said receiver including an equiripple-phase response filter with finite peaks of attenuation that satisfies the following low pass prototype transfer functions ##EQU3## reply processing means for determining the location of and identification of the aircraft based on the detected pulses.
Dependencies are inferred from the claim text.