On the Probability of Cross-Radar Assignment Error

If two radar sensors observe the same target their measurements can be combined to produce a fused target-state estimate that is of higher quality than that from one radar alone. If there are multiple targets whose information is shared, a necessary first step to fusion is to "assign" each...

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Bibliographic Details
Main Authors: Braca, P., Millefiori, L. M., Marano, S., Willett, P., Blair, W. D.
Format: Conference Proceeding
Language:English
Subjects:
Measurement uncertainty
Monte Carlo methods
Radar
Radar measurements
Sensor fusion
Sensors
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Summary:If two radar sensors observe the same target their measurements can be combined to produce a fused target-state estimate that is of higher quality than that from one radar alone. If there are multiple targets whose information is shared, a necessary first step to fusion is to "assign" each measurement from the first sensor to that at the other in such a way that both refer to the same underlying object, a task generally accomplished by minimizing a global cost involving distance. An assignment error occurs when the measurement originated by target i at the first radar is wrongly associated to a measurement originated by target j (not i) at the second radar. Naturally, when such an error occurs the result is fusion of information describing disparate objects, resulting in degraded estimation performance and poor self-assessment in terms of posterior uncertainty. Here we address the issue, and derive approximate assignment error probability. Remarkably, performance depends only upon the parameters combined to a single scalar constant.
ISSN:2375-5318
DOI:10.1109/RadarConf2043947.2020.9266422