Advances in Doppler recognition for ground moving target indication

Paul G. Kealey; Mohammed Jahangir

doi:10.1117/12.665436

18 May 2006 Advances in Doppler recognition for ground moving target indication

Paul G. Kealey, Mohammed Jahangir

Proceedings Volume 6234, Automatic Target Recognition XVI; 62340W (2006) https://doi.org/10.1117/12.665436
Event: Defense and Security Symposium, 2006, Orlando (Kissimmee), Florida, United States

Abstract

Ground Moving Target Indication (GMTI) radar provides a day/night, all-weather, wide-area surveillance capability to detect moving vehicles and personnel. Current GMTI radar sensors are limited to only detecting and tracking targets. The exploitation of GMTI data would be greatly enhanced by a capability to recognize accurately the detections as significant classes of target. Doppler classification exploits the differential internal motion of targets, e.g. due to the tracks, limbs and rotors. Recently, the QinetiQ Bayesian Doppler classifier has been extended to include a helicopter class in addition to wheeled, tracked and personnel classes. This paper presents the performance for these four classes using a traditional low-resolution GMTI surveillance waveform with an experimental radar system. We have determined the utility of an "unknown output decision" for enhancing the accuracy of the declared target classes. A confidence method has been derived, using a threshold of the difference in certainties, to assign uncertain classifications into an "unknown class". The trade-off between fraction of targets declared and accuracy of the classifier has been measured. To determine the operating envelope of a Doppler classification algorithm requires a detailed understanding of the Signal-to-Noise Ratio (SNR) performance of the algorithm. In this study the SNR dependence of the QinetiQ classifier has been determined.

Citation Download Citation

Paul G. Kealey and Mohammed Jahangir "Advances in Doppler recognition for ground moving target indication", Proc. SPIE 6234, Automatic Target Recognition XVI, 62340W (18 May 2006); https://doi.org/10.1117/12.665436

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