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Monopulse Radar detection and localization of multiple unresolved targets via joint bin Processing

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3 Author(s)
Xin Zhang ; Electr. & Comput. Eng. Dept., Univ. of Connecticut, Storrs, CT, USA ; Willett, P.K. ; Bar-Shalom, Y.

If several closely spaced targets fall within the same radar beam and between two adjacent matched filter samples in range, monopulse information from both of these samples can and should be used for estimation, both of angle and of range (i.e., estimation of the range to sub-bin accuracy). Similarly, if several closely spaced targets fall within the same radar beam and among three matched filter samples in range, monopulse information from all of these samples should be used for the estimation of the angles and ranges of these targets. Here, a model is established, and a maximum likelihood (ML) extractor is developed. The limits of the number of targets that can be estimated are given for both case A, where the targets are in a beam and in a range "slot" between the centers of two adjacent resolution cells (that is, from detections in two adjacent matched filter samples), and case B, where the targets are in two or more adjacent slots (among three or more adjacent samples). A minimum description length (MDL) criterion is used to detect the number of targets between the matched filter samples, and simulations support the theory.

Published in:

Signal Processing, IEEE Transactions on  (Volume:53 ,  Issue: 4 )