Attention‐enhanced Alexnet for improved radar micro‐Doppler signature classification

Autor: Shelly Vishwakarma, Wenda Li, Chong Tang, Karl Woodbridge, Ravi Raj Adve, Kevin Chetty
Jazyk: angličtina
Rok vydání: 2023
Předmět:
Zdroj: IET Radar, Sonar & Navigation, Vol 17, Iss 4, Pp 652-664 (2023)
Druh dokumentu: article
ISSN: 1751-8792
1751-8784
DOI: 10.1049/rsn2.12369
Popis: Abstract This work introduces an attention mechanism that can be integrated into any standard convolution neural network to improve model sensitivity and prediction accuracy with minimal computational overhead. The attention mechanism is introduced in a lightweight network – Alexnet and its classification performance for human micro‐Doppler signatures is evaluated. The Alexnet model trained with an attention module can implicitly highlight the salient regions in the radar signatures while suppressing the irrelevant background regions and consistently improving network predictions. Network visualizations are provided through class activation mapping, providing better insights into how the predictions are made. The visualizations demonstrate how the attention mechanism focusses on the region of interest in the radar signatures.
Databáze: Directory of Open Access Journals
Externí odkaz: