Interference motion removal for Doppler radar vital sign detection using variational encoder-decoder neural network

Czerkawski, Mikolaj and Ilioudis, Christos and Clemente, Carmine and Michie, Craig and Andonovic, Ivan and Tachtatzis, Christos; (2021) Interference motion removal for Doppler radar vital sign detection using variational encoder-decoder neural network. In: 2021 IEEE Radar Conference (RadarConf21). IEEE, USA, pp. 1-6. ISBN 9781728176109

[thumbnail of Czerkawski-etal-IEEE-RadarConf2021-Interference-motion-removal-for-Doppler-radar-vital-sign-detection]
Preview
Text (Czerkawski-etal-IEEE-RadarConf2021-Interference-motion-removal-for-Doppler-radar-vital-sign-detection)
Czerkawski_etal_IEEE_RadarConf2021_Interference_motion_removal_for_Doppler_radar_vital_sign_detection.pdf
Accepted Author Manuscript

Download (1MB)| Preview

    Abstract

    The treatment of interfering motion contributions remains one of the key challenges in the domain of radar-based vital sign monitoring. Removal of the interference to extract the vital sign contributions is demanding due to overlapping Doppler bands, the complex structure of the interference motions and significant variations in the power levels of their contributions. A novel approach to the removal of interference through the use of a probabilistic deep learning model is presented. Results show that a convolutional encoder-decoder neural network with a variational objective is capable of learning a meaningful representation space of vital sign Doppler-time distribution facilitating their extraction from a mixture signal. The approach is tested on semi-experimental data containing real vital sign signatures and simulated returns from interfering body motions. It is demonstrated that the application of the proposed network enhances the extraction of the micro-Doppler frequency corresponding to the respiration rate.

    ORCID iDs

    Czerkawski, Mikolaj ORCID logoORCID: https://orcid.org/0000-0002-0927-0416, Ilioudis, Christos ORCID logoORCID: https://orcid.org/0000-0002-7164-6461, Clemente, Carmine ORCID logoORCID: https://orcid.org/0000-0002-6665-693X, Michie, Craig ORCID logoORCID: https://orcid.org/0000-0001-5132-4572, Andonovic, Ivan and Tachtatzis, Christos ORCID logoORCID: https://orcid.org/0000-0001-9150-6805;