Analysis of Doppler Radars With a Numerical Method

IF 4.5 1区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Microwave Theory and Techniques Pub Date : 2025-04-28 DOI:10.1109/TMTT.2025.3559476

Mohammad Marvasti;Halim Boutayeb

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引用次数: 0

Abstract

This work proposes a numerical technique for the analysis of Doppler radar systems, which are used in many applications, including but not limited to aircraft detection, vital signs monitoring, and hand gesture control. The proposed approach consists of using the finite-difference time-domain (FDTD) method with the implementation of moving objects, where the order of magnitude of the speed of light is considered for the numerical movements. This ensures that nonprohibitive computational time is required. The dynamic interactions between electromagnetic waves and moving targets are precisely captured. Medically accurate videos are used for heartbeat and respiration detections. Postprocessing is applied to obtain realistic radar responses, enabling the simulation results to closely mimic those measured by Doppler radars. Several problems are investigated and the numerical results are compared with experimental data reported in the literature. Additionally, an experimental setup is introduced for the analysis of the proposed numerical method, by using a Doppler radar and an object in motion that is video-recorded. The video is then inserted in the FDTD code to compare the simulated and experimental results. Two scenarios are studied: an oscillating metronome and hand gestures. The obtained results further validate the proposed method.

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用数值方法分析多普勒雷达

这项工作提出了一种用于多普勒雷达系统分析的数值技术，该系统用于许多应用，包括但不限于飞机探测，生命体征监测和手势控制。该方法采用时域有限差分（FDTD）方法实现运动物体，其中考虑了光速数量级的数值运动。这确保了所需的计算时间不受限制。精确捕获了电磁波与运动目标之间的动态相互作用。医学上精确的视频用于心跳和呼吸检测。通过后处理得到真实的雷达响应，使仿真结果与多普勒雷达测量结果接近。对几个问题进行了研究，并将数值结果与文献报道的实验数据进行了比较。此外，还介绍了一个实验装置，利用多普勒雷达和一个运动物体的视频记录来分析所提出的数值方法。然后将视频插入FDTD代码中以比较模拟结果和实验结果。研究了两种场景：振荡节拍器和手势。仿真结果进一步验证了所提方法的有效性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Transactions on Microwave Theory and Techniques 工程技术-工程：电子与电气

CiteScore

8.60

自引率

18.60%

发文量

486

审稿时长

6 months

期刊介绍： The IEEE Transactions on Microwave Theory and Techniques focuses on that part of engineering and theory associated with microwave/millimeter-wave components, devices, circuits, and systems involving the generation, modulation, demodulation, control, transmission, and detection of microwave signals. This includes scientific, technical, and industrial, activities. Microwave theory and techniques relates to electromagnetic waves usually in the frequency region between a few MHz and a THz; other spectral regions and wave types are included within the scope of the Society whenever basic microwave theory and techniques can yield useful results. Generally, this occurs in the theory of wave propagation in structures with dimensions comparable to a wavelength, and in the related techniques for analysis and design.