In target tracking systems measurements are typically collected in "scans" or "frames" and then they are transmitted to a processing center. In multisensor tracking systems that operate in a centralized manner, there are usually different time delays in transmitting the scans or frames from the various sensors to the center. This can lead to situations where measurements from the same target arrive out of sequence. Such "out-of-sequence" measurement (OOSM) arrivals can occur even in the absence of scan/frame communication time delays. The resulting "negative-time measurement update" problem, which is quite common in real multisensor systems, was solved previously only approximately in the literature. The exact state update equation for such a problem is presented. The optimal and two suboptimal algorithms are compared on a number of realistic examples, including a GMTI (ground moving target indicator) radar case.


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    Title :

    Update with out-of-sequence measurements in tracking: exact solution


    Contributors:


    Publication date :

    2002-07-01


    Size :

    199233 byte




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English






    S2 Optimal Update with Out-of-Sequence Measurements for Distributed Filtering

    Zhang, K.-S. / Li, X. R. / Zhu, Y. et al. | British Library Conference Proceedings | 2002