2025/09/27 by Riccardo Mazzieri, Mazzieri, Riccardo, Eleonora Cicciarella +7
Computer Science · Engineering · #Advanced SAR Imaging Techniques #FOS: Computer and information sciences #Geophysics and Sensor Technology #Hand Gesture Recognition Systems #Neural and Evolutionary Computing (cs.NE)
paper · pdf · doi:10.48550/arxiv.2509.23303
openalex publication_date 2025/09/27 · openalex created_date 2025/10/19 · openalex updated_date 2026/07/28
Radar-based Human Activity Recognition (HAR) offers privacy and robustness over camera-based methods, yet remains computationally demanding for edge deployment. We present the first use of Spiking Neural Networks (SNNs) for radar-based HAR on aircraft marshalling signal classification. Our novel hybrid architecture combines convolutional modules for spatial feature extraction with Leaky Integrate-and-Fire (LIF) neurons for temporal processing, inherently capturing gesture dynamics. The model reduces trainable parameters by 88% with under 1% accuracy loss compared to baselines, and generalizes well to the Soli gesture dataset. Through systematic comparisons with Artificial Neural Networks, we demonstrate the trade-offs of spiking computation in terms of accuracy, latency, memory, and energy, establishing SNNs as an efficient and competitive solution for radar-based HAR.