Kalman Filtering
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Screen Shot #4 (Merely a picture to illustrate that our GUI is totally self-explanatory) 

The essence of how to handle multi-target tracking using Kalman filters (via radar, sonar, other acoustic, or infrared) is conveyed in the following two screens:

Also see Miller, M. L., Stone, H, S., Cox, I. J., “Optimizing Murty’s Ranked Assignment Method,” IEEE Trans. on Aerospace and Electronic Systems, Vol. 33, No. 7, pp. 851-862, July 1997. Another: Frankel, L., and Feder, M., “Recursive Expectation-Maximizing (EM) Algorithms for Time-Varying Parameters with Applications to Multi-target Tracking,” IEEE Trans. on Signal Processing, Vol. 47, No. 2, pp. 306-320, February 1999. Yet another: Buzzi, S., Lops, M., Venturino, L., Ferri, M., “Track-before-Detect Procedures in a Multi-Target Environment,” IEEE Trans. on Aerospace and Electronic Systems, Vol. 44, No. 3, pp. 1135-1150, July 2008.

Also see: Rao, S. K., “Comments on Discrete-Time Observability and Estimability Analysis for Bearings-Only Target Motion Analysis,” IEEE  Trans. on Aerospace and Electronic Systems, Vol. 34, No. 4, pp. 1361-1367, Oct. 1998.

Candy, J. V., Model-Based Signal Processing, Simon Haykin (Editor), IEEE Press and Wiley-Interscience, A John Wiley & Sons, Inc. Publication, Hoboken, NJ, 2006. [This new book, by an author with a Lawrence Livermore National Laboratory/University of California, Santa Barbara affiliation, offers a reasonably wide modern coverage and good pointers to precedents just like our own TeK Associates’ TK-MIP also offers but our software costs only $499 and their software cost more than three times as much and apparently does much less (and requires the use of MatLab, which is a considerable expense in itself)].

Gupta, S. N., “An Extension of Closed-Form Solutions of Target-Tracking Filters with Discrete Measurements,” IEEE Trans. on Aerospace and Electronic Systems, Vol. 20, No. 6, pp. 839-840, Nov. 1984.

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