Non-Contact Respiration Rate Estimation using 24 GHz Pulse Radar Employing Envelope Detection

S. Zainuddin, N. E. Rashid, Khairul Khaizi Mohd Shariff, M. S. A. Megat Ali, F. Seman, I. Pasya
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引用次数: 2

Abstract

Recently, there are a lot of interest in utilizing radar technology to realize non-contact respiration rate (RR) measurements. This paper presents an RR estimation using a 24 GHz pulse radar employing an envelope detection on the IF signal at the receiver. Two methods of RR estimation methods were discussed: (1) a peak difference in the time domain, and (2) peak detection of the FFT spectrum of the receiving signal. The accuracy of the proposed method were investigated through from actual measurements of subjects breathing in front of the radar. Both methods were found to produce comparable accuracy RR estimation, however, using peak detection of the FFT spectrum marked slightly better accuracy. The measurement error was larger when using peak difference the time domain, due to measurement noises impacting the calculation of peak difference. The results of this paper indicated the workability of the proposed method, and hence developed a foundation of the non-contact RR estimation system to be implemented in various patient monitoring application with specific breathing conditions, such as acute breathing syndromes.
采用包络检测的24ghz脉冲雷达非接触呼吸速率估计
近年来,利用雷达技术实现非接触呼吸速率(RR)测量引起了人们的极大兴趣。本文提出了一种利用24 GHz脉冲雷达对接收机中频信号进行包络检测的RR估计方法。讨论了两种RR估计方法:(1)时域的峰值差,(2)接收信号FFT谱的峰值检测。通过对被测者在雷达前呼吸的实际测量,考察了所提方法的准确性。两种方法的RR估计精度相当,但使用FFT谱峰检测的RR估计精度略好。由于测量噪声对峰值差计算的影响,采用峰值差时域测量误差较大。本文的结果表明了所提出方法的可行性,从而为非接触RR估计系统奠定了基础,该系统可用于具有特定呼吸条件(如急性呼吸综合征)的各种患者监测应用。
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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