Continuous human activity recognition using a MIMO radar for transitional motion analysis

John Kobak; Bennett J. Richman; LaJuan Washington Jr.; Syed A. Hamza

doi:10.1117/12.2663714

13 June 2023 Continuous human activity recognition using a MIMO radar for transitional motion analysis

John Kobak, Bennett J. Richman, LaJuan Washington Jr., Syed A. Hamza

Proceedings Volume 12522, Big Data V: Learning, Analytics, and Applications ; 125220D (2023) https://doi.org/10.1117/12.2663714
Event: SPIE Defense + Commercial Sensing, 2023, Orlando, Florida, United States

Abstract

The prompt and accurate recognition of Continuous Human Activity x(CHAR) is critical in identifying and responding to health events, particularly fall risk assessment. In this paper, we examine a multi-antenna radar system that can process radar data returns for multiple individuals in an indoor setting, enabling CHAR for multiple subjects. This requires combining spatial and temporal signal processing techniques through micro-Doppler (MD) analysis and high-resolution receive beamforming. We employ delay and sum beamforming to capture MD signatures at three different directions of observation. As MD images may contain multiple activities, we segment the three MD signatures using an STA/LTA algorithm. MD segmentation ensures that each MD segment represents a single human motion activity. Finally, the segmented MD image is resized and processed through a convolutional neural network (CNN) to classify motion against each MD segment.

Conference Presentation

Citation Download Citation

John Kobak, Bennett J. Richman, LaJuan Washington Jr., and Syed A. Hamza "Continuous human activity recognition using a MIMO radar for transitional motion analysis", Proc. SPIE 12522, Big Data V: Learning, Analytics, and Applications , 125220D (13 June 2023); https://doi.org/10.1117/12.2663714

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available