SITIS Archives - Topic Details
Program:  SBIR
Topic Num:  AF071-213 (AirForce)
Title:  False Alarm Rejection (FAR) Techniques for Missile Warning Systems (MWSs)
Research & Technical Areas:  Sensors, Electronics

  Objective:  Demonstrate that a target and background comparison technique can provide inexpensive and effective FAR for MWS.
  Description:  Missile warning systems have difficulty providing high probability of declaration, adequate warning time and a low probability of false declaration in severe clutter. Infrared and visible focal plane arrays are being developed with smaller instantaneous field-of-views (IFOV) and offer increased detection/declaration range for MWS. However, the most difficult problem for MWS has been the high false alarm rates caused by severe clutter and man-made objects. A number of discrimination techniques that exploit the spectral, spatial and temporal differences between a target and the background are available, and while effective, they have not reduced the false alarm rate to desired rates. Additional false alarm rejection techniques are needed. One false alarm rejection technique not fully investigated is to compare the movement of a potential target with the movement of background objects. As an aircraft is flying, all background objects move in a similar manner while targets move in a different manner. The differences between the movement of the target and background objects can be used to discriminate between them. Potential targets can be compared with background objects over the total sensor field of view (FOV) or it may be necessary to reduce the FOV to the region immediately around the potential target by windowing. Windowing allows higher frame rates and quicker declaration decisions.

  PHASE I: Conduct a feasibility concept study to identify and determine likely effectiveness of novel algorithms that use relative object movement to reliably discriminate between actual targets and false targets. Show feasibility of the background comparison technique by demonstrating key concepts for additional Phase II exploration.
  
  PHASE II: Develop and characterize candidate algorithms. Construct a prototype system to demonstrate concept feasibility in a representative environment. Demonstrate key technologies needed to build a flyable prototype visible MWS system using background comparison techniques to reduce false alarms.

  DUAL USE COMMERCIALIZATION: Military application: A simple and effective background comparison technique that reduces false alarm rates has military applications for MWSs. Commercial application: A simple and effective background comparison techniques that reduces false alarm has commercial applications for MWSs.

  References:  1. STAS: a code suite for space-time adaptive processing of IR Images Steven P. Auerbach, Lawrence E. Hauser,Frederick P. Boynton, Ralph S. Janda, Dino J. Sofianos, Science Applications International Corp., La Jolla, CA, USA. Proceedings of SPIE - The International Society for Optical Engineering 1996. Vol 2759; p25-33 2. Microcomputer-based workstation for simulation and analysis of background and target IR signatures Richard C. Reeves, John H. Schaibly, Horizons Technology, Inc., San Diego, CA, USA. Proceedings of SPIE - The International Society for Optical Engineering 1991. Vol 1486; p85-101

Keywords:  missile warning systems, visible missile warning system, false alarm reduction.

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