Apparatus and method for mitigating multipath

Details Apparatus and method for mitigating multipath Apparatus and method for mitigating multipath

1998-02-20

1999-03-02

Pihulic, Daniel T.

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

Air traffic control

G01S 1391

Patent

active

058777210

ABSTRACT:
An apparatus and method for discriminating between false images created by multipath and an aircraft of interest in an air traffic control environment by maintaining a three-dimensional database in the area of interest of the air traffic control environment, the three-dimensional database including a position of a radar radiation source, three-dimensional positions, orientations, and sizes of fixed reflectors and three-dimensional positions, orientations, and sizes of non-fixed reflectors; receiving return radar radiation from an unknown object; classifying the unknown object as an aircraft of interest if the return radiation from the unknown object correlates with previous returns; and classifying the unknown object by searching for a plurality of candidate reflectors and if a sum of the distances between the plurality of candidate reflectors is approximately equal to a distance between the unknown object and the radar radiation source, classifying the unknown object as a false image created by multipath.

REFERENCES:
patent: 4970518 (1990-11-01), Cole, Jr.
patent: 5374932 (1994-12-01), Wyschogrod et al.

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