Meta-level Target Tracking

There are zillions of papers on sensor-level target tracking using filtering algorithms. A much more important problem is: Given track estimates, how do devise automated signal interpretation algorithms that assist a human operator to interpret the trajectory of a target? For example: How can one infer if a target is circling a building and therefore behaving suspiciously? A closed trajectory has long range dependencies – the beginning and end points coincide. Standard  Markovian state space models cannot capture the long range dependencies and spatial complexities of such trajectories

We call the problem of trajectory inference as meta-level target tracking. It is the next level of abstraction beyond standard tracking, We use natural language processing models such as  stochastic context free grammars and reciprocal stochastic processes to model the trajectories of targets.. Our meta-level target tracking goes beyond sensor-level tracking. We aim to infer the intent of the target – this constitutes the human-sensor interface (middleware).

Related Book and Papers

  1. [Edited Book]. M. Mallick, V. Krishnamurthy and B. Vo,  Integrated Tracking Classification and Sensor Management, Wiley 2013.
  2. M. Fanaswala and V. Krishnamurthy,  Syntactic Models For Trajectory Constrained Track-Before-Detect, IEEE Transactions Signal Processing, Vol.62, No.23, pp.6130–6142, Dec. 2014.

  3. M. Fanaswala and  V. Krishnamurthy,  Spatio-Temporal Trajectory Models For Meta-Level Target Tracking, IEEE Aerospace and Electronic Systems Magazine,  Vol.30, No.1, pp.16–31, Jan. 2015.

  4. M. Fanaswalla, V. Krishnamurthy, Detection of anomalous trajectory patterns in target tracking using Stochastic Context Free Grammars and Reciprocal Processes, IEEE Journal Selected Topics in Signal Processing, Vo.7, No.1, pp.76–90, Jan., 2013.

  5. V. Krishnamurthy, M. Fanaswalla, Intent Inference via Syntactic Tracking, Digital Signal Processing, Vol2. No.5, pp.648–659, 2011.

  6. A. Wang, V. Krishnamurthy, B. Bhashyam, Intent Inference and Syntactic Tracking with GMTI Measurements, IEEE Transactions Aerospace and Electronic Systems, Vol.47, No.4, pp.2824–2843, October 2011.

  7. N. Visnevski, V Krishnamurthy, A. Wang and S. Haykin, Syntatic Modeling ad Signal Processing of Multifunction Radars: A Stochastic Context Free Grammar Approach. Proceedings of the IEEE, Special Issue on Large Scale Dynamic Systems, Vol.95, No.5, pp.1000–1025, May, 2007.