Method for distributed data association and multi-target tracking

• US 5,138,321 A
• Filed: 10/15/1991
• Issued: 08/11/1992
• Est. Priority Date: 10/15/1991
• Status: Expired due to Term

• Current Assignee: Lockheed Martin Corporation (Martin Marietta Corporation)
• Original Assignee: International Business Machines Corporation
• Inventors: Hammer, Jonathan B.
• Primary Examiner(s): Tubbesing, T. H.
• Application Number:
  US07/776,963
• Time in Patent Office: 301 Days
• Field of Search: 342/36, 342/59, 342/95, 342/96
• US Class Current: 342/36
• CPC Class Codes: G01S 13/726 Multiple target tracking
• CPC Class Codes: G01S 13/87 Combinations of radar systems, e.g. primary radar and secondary radar

Abstract

A technique is disclosed for multiple sensor tracking which distributes data association and filtering processing among multiple processing entities but coordinates the track estimates such that track states and covariances represent the equivalent of a centralized estimate. The object of the invention is to establish and maintain a single system track for a single aircraft in a distributed processing environment. This is achieved through communication of track information among processing entities which process a single sensor'"'"'s inputs. Continued updating and re-broadcasting of process data are performed between the multiple sensor'"'"'s processing entities.

Claims

1. A method of multi-target tracking objects within a processing system having a plurality of processing nodes, comprising the steps of:

receiving a target report from a processing node;

processing the target report to correlate it with a specific track;

updating the track state and covariance;

broadcasting the track and covariance to other processor nodes;

receiving the broadcast tracking and covariance information within said other processes nodes; and

replacing the present tracking and covariance information with the broadcast information.

2. The method of claim 1 wherein the processing step includes applying a target selection rule to correlate a sensor signal to a specific track.

3. The method of claim 1 wherein the processing step includes applying a track fusion algorithm to correlate a sensor signal to a specific track.

4. In an air traffic control system, having a plurality of radar stations for detecting a plurality of aircraft, a method of tracking aircraft within a location comprising the steps of:

receiving a report of aircraft from a radar station;

processing the aircraft report to correlate it with a specific aircraft track;

updating the aircraft track state and covariance;

broadcasting the aircraft track and covariance to other radar stations;

receiving the broadcast aircraft tracking and covariance information within said other radar stations; and

replacing the present aircraft tracking and covariance information with the broadcast information.