SITIS Archives - Topic Details
Program:  SBIR
Topic Num:  AF071-090 (AirForce)
Title:  Multi-Static Sensor Information Integration
Research & Technical Areas:  Air Platform, Sensors, Electronics

  STATEMENT OF INTENT: The intent is to provide the Warfighter better situational awareness by increasing the ability to detect airborne and ground targets.
  Objective:  The objective is to analyze and develop multi-static radar concepts for detecting airborne and ground targets in the presence of severe clutter and interference backgrounds.
  Description:  Bi-static radar operation offers several advantages over monostatic operation such as, range equation advantages, improved ECCM, covert receiver and stand-off transmitter operation. Multi-static operation offers these same advantages, plus spatial diversity by having multiple receivers in the battlefield. The multistatic concept is to use a high valued ISR platform, such as AWACS, as an illuminator and several passive receivers over the field of regard. The information from each of the passive receivers is coherently combined at the transmitter in order to provide both airborne moving target indicators (AMTI) and ground moving target indicators (GMTI). It is expected that having multiple receivers will allow for improved target detection, when operating over severe clutter and interference environments plus improved SNR performance due to the spatial diversity. An investigation is needed to determine the issues of performing MTI in a multi-static fashion. Consider possible scenarios using both single and multiple illuminators as well as multiple passive receivers. Develop a technique for combining the information from multiple receivers that will allow for improved MTI detections. An alternative is to have the remote sensors operate monostatically, requiring the main ISR platform to cohere data form multiple sources. This active mode for remote sensors requires them to both illuminate and receive and then to pass the MTI to the core ISR platform in the sensor net. The advantage of having active multi-static adjunct, or auxiliary, sensors is that they may cover areas that are optically shadowed from the main sensor. Also, having spatially separated active sensors allows for spatial and temporal waveform diversity with the potential of improved SNR on target, anti-jamming capability, and tomographic imaging. If the remote sensors are Unmanned Aerial Vehicles (UAVs), These UAVs in conjunction with an AWACS would constitute a swarm requiring special management and scheduling techniques. Digital Pheremones and Stigmergy can be used as a guide toward controlling the behavior of the UAVs, as they fly unique flight patterns homologous to the AWACS racetrack flight path.

  PHASE I: Perform an initial analysis of multi-static concepts. Identify scenarios that would be beneficial for MTI detection, both ground & air. Initiate the development of a method to cohere the receiver information to aid in the detection process.
  PHASE II: Complete the algorithm development initiated in Phase 1. The design should include coverage/range analysis, receiver sensor number & location analysis, radar waveform selection, clutter model & mathematical formulation of multi-static signal processing algorithms. Implement a computer simulation model of the developed design; consider using internal AFRL simulation tools such as RLSTAP & RAST-K.

  DUAL USE COMMERCIALIZATION: Military application: This work could be extended to a variety of military and civilian applications, which includes SBR, airborne surveillance systems, anti-drug surveillance systems, and communication systems. Commercial application: This work could be extended to commercial traffic monitoring systems and communication systems.


Keywords:  Multi-Statics, STAP, GMTI, AMTI, Unmanned Aerial Vehicles

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