Hybrid radar signal fusion for unresolved target detection

N. Nandakumaran; A. Sinha; T. Kirubarajan

doi:10.1117/12.734513

25 September 2007 Hybrid radar signal fusion for unresolved target detection

N. Nandakumaran, A. Sinha, T. Kirubarajan

Proceedings Volume 6699, Signal and Data Processing of Small Targets 2007; 669911 (2007) https://doi.org/10.1117/12.734513
Event: Optical Engineering + Applications, 2007, San Diego, California, United States

Abstract

Radar systems have good radial resolution, but they have poor angular resolution that results in unresolved measurements. This problem can be mitigated by utilizing the spatial diversity of multistatic radar system. In this paper, the detection of unresolved targets with a hybrid radar system using signal level fusion is considered. The system consists of two receivers: one is co-located with the transmitter and the other is located far from the transmitter. The area of interest, where the transmitter is focused on, is divided into grids, which are formed by circular range bins of the monostatic receiver and elliptical range bins of the bistatic receiver. Assuming these grids are good enough to resolve the targets (i.e., each grid has at most one target and vice versa), the amplitudes of the targets (corresponding to all grids) that maximize the likelihoods of the signals obtained from both receivers are determined. These optimum values are then compared against a threshold for the final decision. Simulation studies are performed to demonstrate the proposed algorithm for hybrid radar system with unresolved targets. The simulation results confirm the enhancement in detection of unresolved targets by fusing coherently received signals from both monostatic and bistatic receivers.

Citation Download Citation

N. Nandakumaran, A. Sinha, and T. Kirubarajan "Hybrid radar signal fusion for unresolved target detection", Proc. SPIE 6699, Signal and Data Processing of Small Targets 2007, 669911 (25 September 2007); https://doi.org/10.1117/12.734513

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