Method of determining the position of multiple targets using bea

Details Method of determining the position of multiple targets using bea Method of determining the position of multiple targets using bea

1986-06-20

1989-02-21

Moskowitz, N.

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

Determining distance

Triangulation

342451, 342463, G01S 1306

Patent

active

048069361

ABSTRACT:
The positions of a plurality of targets (26) are located using three or more sensors (20, 22, 24) such as radars which sense only the bearing angle of the targets. The intersecting bearing lines (30) form triangles (28) representing both true targets (26) and false targets (28). The false target triangles (28) are separated from the true target triangles by analyzing the size and position of each triangle. Bearing data defining the triangles is first ordered and then sequentially examined in a manner such that a first group of false targets (28) is eliminated from consideration. The bearing data defining the remaining triangles is processed through coarse and fine gates to eliminate second and third groups of false targets (28). A fourth group of false targets (28) is eliminated by using a global maximum likelihood procedure, in which a likelihood function is maximized through the use of discrete optimization techniques.

REFERENCES:
patent: 2470787 (1949-05-01), Nosker
patent: 3184739 (1965-05-01), Franklin et al.
patent: 3248734 (1966-04-01), Weiss et al.
patent: 3445847 (1969-05-01), Hammack
patent: 3531801 (1970-09-01), Huebscher
patent: 3564543 (1971-02-01), Nehama et al.
Patrick R. Williams, Multiple Target Estimation Using Multiple Bearing-Only Sensors, Jun. 2-5, 1986.
Charles Morefield, Application O-1 Integer Programming to Multitarget Tracking Problems, Jun. 1977, IEEE Transactions on Automatic Control, vol. cont . . . AC-22 No. 3.
Yaakov Bar-Shalom, Tracking Methods in a Multitarget Environment, Aug. 1978, IEEE Transactions on Automatic Control, vol. AC-23, No. 4.
Charles L. Morefield, Interim Report on Multitarget Tracking Using Multiple Acoustic Sensors, Jun. 1976, Chlares L. Morefield, Multitarget Tracking for Sase, Dec. 1987, vols. I and II.

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