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Micro-Doppler Based Human-Robot Classification Using Ensemble and Deep Learning Approaches

: Abdulatif, Sherif; Wei, Qian; Aziz, Fady; Kleiner, Bernhard; Schneider, Urs


Institute of Electrical and Electronics Engineers -IEEE-:
IEEE Radar Conference 2018, RadarConf 2018 : 23-27 April 2018, Oklahoma City, USA
Piscataway, NJ: IEEE, 2018
ISBN: 978-1-5386-4168-2 (print)
ISBN: 978-1-5386-4167-5 (electronic)
ISBN: 978-1-5386-4165-1 (CD-ROM)
ISBN: 978-1-5386-4166-8 (USB)
Radar Conference (RadarConf) <2018, Oklahoma City/Okla.>
Conference Paper
Fraunhofer IPA ()
Unfallverhütung; Neuronales Netzwerk; Integration; Deep Learning; Radar; Risikomanagement; Robotik

Radar sensors can be used for analyzing the induced frequency shifts due to micro-motions in both range and velocity dimensions identified as micro-Doppler (μ-D) and micro-Range (μ-R), respectively. Different moving targets will have unique μ-D and μ-R signatures that can be used for target classification. Such classification can be used in numerous fields, such as gait recognition, safety and surveillance. In this paper, a 25 GHz FMCW Single-Input Single-Output (SISO) radar is used in industrial safety for real-time human-robot identification. Due to the real-time constraint, joint Range-Doppler (R-D) maps are directly analyzed for our classification problem. Furthermore, a comparison between the conventional classical learning approaches with handcrafted extracted features, ensemble classifiers and deep learning approaches is presented.
For ensemble classifiers, restructured range and velocity profiles are passed directly to ensemble trees, such as gradient boosting and random forest without feature extraction. Finally, a Deep Convolutional Neural Network (DCNN) is used and raw R-D images are directly fed into the constructed network. DCNN shows a superior performance of 99% accuracy in identifying humans from robots on a single R-D map.