Enhanced performance mode S interrogator
First Claim
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1. 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.
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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.
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Citations
1 Claim
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1. An enhanced performance Mode S interrogator for interrogating an aircraft and processing a reply, said interrogator comprising:
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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.
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Specification
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Current AssigneeNorthrop Grumman Systems Corporation (Northrop Grumman Corporation), Camco Drilling Group Ltd. (NOV, Inc.)
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Original AssigneeWestinghouse Electric Corporation (Paramount Global (f/k/a ViacomCBS Inc.))
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InventorsSchofield, Ann C., Blinchikoff, Herman J.
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Primary Examiner(s)TUBBESING, THEODORE
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Application NumberUS07/786,835Time in Patent Office452 DaysField of Search342/32, 342/149, 342/151US Class Current342/32CPC Class CodesG01S 13/44 Monopulse radar, i.e. simul...G01S 13/765 with exchange of informatio...G01S 13/87 Combinations of radar syste...
