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arXiv 2301.05652eess.SPeess.IV
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基于谐波微多普勒特征使用卷积神经网络的运动分类

Motion Classification Based on Harmonic Micro-Doppler Signatures Using a Convolutional Neural Network

Cory Hilton, Steve Bush, Faiz Sherman, Matt Barker, Aditya Deshpande, Steve Willeke, Jeffrey A. Nanzer

AI总结:

本文利用谐波射频标签的微多普勒特征,通过7层CNN对持有物体的四种常见运动进行分类,在杂乱环境中达到94.24%的实时准确率。

摘要:

我们展示了利用谐波射频标签散射的谐波微多普勒特征对持有物体的常见运动进行分类。谐波标签捕获入射信号并以谐波频率重新发射,使其更容易与杂波区分。我们通过谐波信号(谐波多普勒)的时变频移来表征被标记手持物体的运动。对于持有物体的复杂微运动,时频响应表现出复杂的微多普勒特征,可用于对运动进行分类。我们开发了2.4/4.8 GHz的窄带谐波标签,支持多标签操作中的频率可扩展性,以及一个谐波雷达系统,用于发射2.4 GHz连续波信号并接收散射的4.8 GHz谐波信号。实验模拟了35名受试者在杂乱室内环境中持有物体的四种常见运动。开发了一个7层卷积神经网络(CNN)多标签分类器,获得了94.24%的实时分类准确率,每个样本的响应时间为2秒,数据处理延迟小于0.5秒。

英文摘要:

We demonstrate the classification of common motions of held objects using the harmonic micro-Doppler signatures scattered from harmonic radio-frequency tags. Harmonic tags capture incident signals and retransmit at harmonic frequencies, making them easier to distinguish from clutter. We characterize the motion of tagged handheld objects via the time-varying frequency shift of the harmonic signals (harmonic Doppler). With complex micromotions of held objects, the time-frequency response manifests complex micro-Doppler signatures that can be used to classify the motions. We developed narrow-band harmonic tags at 2.4/4.8 GHz that support frequency scalability for multi-tag operation, and a harmonic radar system to transmit a 2.4 GHz continuous-wave signal and receive the scattered 4.8 GHz harmonic signal. Experiments were conducted to mimic four common motions of held objects from 35 subjects in a cluttered indoor environment. A 7-layer convolutional neural network (CNN) multi-label classifier was developed and obtained a real time classification accuracy of 94.24%, with a response time of 2 seconds per sample with a data processing latency of less than 0.5 seconds.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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