Air traffic advisory system bearing estimation receiver

Details Air traffic advisory system bearing estimation receiver Air traffic advisory system bearing estimation receiver

1995-08-24

1997-02-18

Issing, Gregory C.

Communications: directive radio wave systems and devices (e.g.,

Directive

Beacon or receiver

342 29, 342147, 342427, 342454, G01S 502, G01S 1300

Patent

active

056045042

ABSTRACT:
In an air traffic advisory system for determining the bearing of an intruder aircraft relative to a protected aircraft, the preferred apparatus determines a corrected bearing to compensate for bearing errors caused by intruder signal reflections. More particularly, the preferred apparatus uses a hybrid combiner to produce a sum, delta one and delta two signals, and determines the phase relationship between the sum signal and each of the delta signals, the two phase relationships being subject to at least partially offsetting errors due to intruder signal reflections. The apparatus determines an uncorrected intruder bearing from each phase relationship and then averages the uncorrected bearings to produce a corrected intruder bearing.

REFERENCES:
patent: 3346861 (1967-10-01), Chadwick et al.
patent: 4438436 (1984-03-01), Murphy
patent: 4855748 (1989-08-01), Brandao et al.
patent: 5402130 (1995-03-01), Sherman

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