Communications: directive radio wave systems and devices (e.g. – Directive – Beacon or receiver
Patent
1990-05-25
1992-10-20
Swann, Tod
Communications: directive radio wave systems and devices (e.g.,
Directive
Beacon or receiver
375 1, 342400, 342 49, G01S 144
Patent
active
051574080
ABSTRACT:
A radio system for determining the range and bearing of mobile equipment, such as an aircraft, relative to reference equipment such as an aircraft carrier, with low probability of interception (LPI). The aircraft remains equipped with high power range and bearing determination equipment, such as TACAN equipment. Reference equipment transmits a LPI beacon, such as a pseudo noise code spread spectrum signal through a rotating beam antenna to amplitude modulate the beacon as a function of antenna orientation. The PN code is inverted as the antenna passes through a reference bearing. Mobile LPI equipment determines bearing and generates a high power signal, such as an emulated TACAN beacon signal. High power range and bearing equipment extracts bearing information from the emulated signal and display it. Range can be determined in a cooperative mode. Mobile LPI equipment transmits a LPI interrogation signal. Reference LPI equipment returns a LPI reply signal. Mobile LPI equipment determines range from the delay time, and generates a high power reply signal from which the high power range and bearing position determination means can extract and display range information.
REFERENCES:
patent: 3714573 (1973-01-01), Paradise
patent: 3940763 (1976-02-01), Grossman
patent: 3969725 (1976-07-01), Couvillon et al.
patent: 4010465 (1977-03-01), Dodington et al.
patent: 4162495 (1979-07-01), Prill
patent: 4442430 (1984-04-01), Schneider
patent: 4564840 (1986-01-01), Brisse et al.
patent: 4751512 (1988-06-01), Longaker
patent: 4910521 (1990-03-01), Mellon
Merrill I. Skolnik, Introduction to Radar Systems, Radar Transmitters, McGraw-Hill 1962, p. 223.
Merrill I. Skolnik, Radar Handbook, 1970, pp. 7-61.
Navcom Defense Electronics, Inc. Brochure, AN/URN-25 TACAN Transponder.
Robert C. Dixon, Spread Spectrum Systems and Interference Rejection Techniques, Engineering 867.36, 1983.
Military Standard Standard Tactical Air Navigation (TACAN) Signal, FSC 5826, Dec. 13, 1967, pp. ii, iii, 1-11.
Stahley William
Van Cleave James R.
Wagner Kenneth M.
NavCom Defence Electronics, Inc.
Swann Tod
LandOfFree
Low probability of interception relative position determination does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Low probability of interception relative position determination , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low probability of interception relative position determination will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-195227