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Poster: Efficient Multi-Scale CNN for Radar-Based Human Activity Recognition in Elderly Healthcare

Aug 2026 · IEEE International Conference on Embedded and Real-Time Computing Systems and Applications · pp. 218-219 · 0 citations · 7 references

Abstract

Radar-based human activity recognition (HAR) is a promising solution for elderly healthcare because it enables non-contact and privacy-preserving monitoring. However, existing lightweight CNN-based methods often have limited receptive fields, while many transformer-based approaches introduce high computational overhead. To address these limitations, a lightweight Multi-Scale Inverted Residual Network (MSIRNet) is proposed for radar-based HAR. MSIRNet integrates parallel multi-scale depthwise convolutions within an inverted residual framework to efficiently capture radar activity patterns. Experimental results on a 15-subject radar dataset under leaveone-subject-out (LOSO) evaluation demonstrate that MSIRNet achieves 81.60% accuracy with a model size of only 0.97 MB and 7.29 ms inference latency on a Jetson Orin Nano.

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