DISCRETE NON-LINEAR ASW DATA FUSION FOR SHALLOW WATER TRACKING AND SURVEILLANCE

Award Information
Agency:
Department of Defense
Amount:
$499,818.00
Program:
SBIR
Contract:
N/A
Solitcitation Year:
N/A
Solicitation Number:
N/A
Branch:
Navy
Award Year:
1991
Phase:
Phase II
Agency Tracking Number:
15481
Solicitation Topic Code:
N/A
Small Business Information
Metron Inc.
11911 Freedom Drive, Reston, VA, 22090
Hubzone Owned:
N
Woman Owned:
N
Socially and Economically Disadvantaged:
N
Duns:
N/A
Principal Investigator
 Lawrence D Stone
 Principal Investigator
 (703) 787-8700
Business Contact
Phone: () -
Research Institution
N/A
Abstract
CONTINGENCY AND LIMITED OBJECTIVE WARFARE OPERATIONS MAY REQUIRE NAVAL FORCES TO OPERATE CLOSE TO ENEMY SHORES IN SHALLOW WATERS WITH ADVERSE ACOUSTIC ENVIRONMENTS. THE OBJECTIVE OF THE PROPOSED WORK IS THE DEVELOPMENT OF A DATA FUSION SYSTEM THAT PROVIDES TRACKING AND SURVEILLANCE IN THIS ENVIRONMENT EVEN AGAINST DIESEL THREATS. SUCH A SYSTEM WILL REQUIRE THE USE OF MULTIPLE SOURCES AND RECEIVING ARRAYS. PRESENT DAY DATA FUSION ALGORITHMS ARE NOT CAPABLE OF HANDLING MULTIPLE SOURCES AND RECEIVERS COUPLED WITH MULTIPLE TRANSMISSION PATHS AND FALSE ALARMS. WE PROPOSE TO COMBINE THE LIKELIHOOD RATIO TRACKER (LRT) WITH MATCHED MODE PROCESSING TO DEVELOP A SHALLOW WATER DATA FUSION SYSTEM. LRT IS A DISCRETE, RECURSIVE, NON-LINEAR FILTER THAT COMPUTES ESTIMATES OF TARGET STATE (POSITION, VELOCITY, DEPTH) IN TERMS OFPROBABILITY DISTRIBUTIONS. LRT HAS DEMONSTRATED ITS ABILITY TO PROCESS NON-LINEAR MEASUREMENT DATA WITH NON-GAUSSIAN MEASUREMENT ERRORS IN SITUATIONS INVOLVING ACTIVE SENSORS, MULTIPLE RECEIVERS, MULTIPLE TRANSMISSION PATHS, MANEUVERING TARGETS, AND FALSE TARGETS. MATCHED MODE PROCESSING IS A NEW TECHNIQUE THAT PRODUCES TARGET RANGE AND DEPTH ESTIMATES FROM SIGNALS RECEIVED AT VERTICAL ARRAYS EVEN IN THE PRESENCE OF MULTIPLE TRANSMISSION PATHS. MATCHED MODE PROCESSING IS ROBUST TO MIS-ESTIMATION OF TRANSMISSION LOSSES RESULTING FROM SURFACE REFLECTIONS AND BOTTOM BOUNCES.

* information listed above is at the time of submission.

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