Design of Vital Signs Detection System Based on 77GHz FMCW Radar

Zhou, Pengcheng; Xu, Yin; Wang, Xinhuai; Xu, Hongyang; Shi, Xiaowei; Li, Xin

doi:10.1109/icmmt55580.2022.10023113

Cited by 2 publications

(1 citation statement)

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“…where k represents the ambiguous multiple. Additionally, there exists the following relationship between the radar's range resolution ΔR, maximum unambiguous range Rmax, velocity resolution ΔV, and maximum unambiguous velocity Vmax [17]:…”

Section: Methodsmentioning

confidence: 99%

A Waveform and Velocity Ambiguity Resolution Method for Corner Radar

Liu,

Zhang,

Wang

et al. 2024

Applied Sciences

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Millimeter-wave radar is experiencing an increasing demand for higher resolution and elevation measurement, necessitating its evolution from 3D millimeter-wave radar systems to 4D millimeter-wave radar. Unlike front automotive radar, corner radar is particularly interested in close-range targets. This article proposes a composite waveform tailored for automotive corner radar, employing different waveform schemes for various distances. This allows millimeter-wave angle radar to achieve superior range resolution and velocity resolution in the close and medium ranges. However, enhancing velocity resolution inevitably results in a reduction in the maximum unambiguous velocity. Consequently, a velocity ambiguity resolution method based on target parameter matching for front and rear frames is proposed to address this issue. The feasibility of the composite waveform and method are verified through simulation. Finally, a radar designed with the ALPS PRO chip is employed to test the designed waveform and velocity ambiguity resolution method, yielding results that are largely consistent with the simulation outcomes. The findings indicate a notable enhancement in resolution for medium distances ranging from 60 to 100 m when employing the proposed waveform. Moreover, the velocity ambiguity resolution method effectively resolves velocity ambiguity, leading to enhanced accuracy in velocity measurements. This suggests that the composite waveform and algorithm are well suited for current automotive angle radar applications.

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Section: Methodsmentioning

confidence: 99%