A stochastic grid filter for multi-target tracking.

  • Author(s) / Creator(s)
  • In this paper, we discuss multi-target tracking for a submarine model based on incomplete observations. The submarine model is a weakly interacting stochastic dynamic system with several submarines in the underlying region. Observations are obtained at discrete times from a number of sonobuoys equipped with hydrophones and consist of a nonlinear function of the current locations of submarines corrupted by additive noise. We use filtering methods to find the best estimation for the locations of the submarines. Our signal is a measure-valued process, resulting in filtering equations that can not be readily implemented. We develop Markov chain approximation approach to solve the filtering equation for our model. Our Markov chains are constructed by dividing the multi-target state space into cells, evolving particles in these cells, and employing a random time change approach. These approximations converge to the unnormalized conditional distribution of the signal process based on the back observations. Finally we present some simulation results by using the refining stochastic grid (REST) filter (developed from our Markov chain approximation method).

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    Conference/Workshop Presentation
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    Copyright 2004 Society of Photo Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
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    • S. Kim, M.A. Kouritzin, H. Long, J. McCrosky, W. Sun, and X. Zhao, "A stochastic grid filter for multi-target tracking", in Signal Processing, Sensor Fusion and Target Recognition XIII, 2004 Proceedings of SPIE, 5429: 245-253. doi:10.1117/12.546125