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Doppler phase modulation effect for non-contact accurate measurement of vital signs and other periodic movements - from theory to CMOS system on chip integrations.

机译：多普勒相位调制效应可用于非接触式准确测量生命体征和其他周期性运动-从理论到CMOS片上系统集成。

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摘要

This dissertation begins with the spectral analysis of the non-linear Doppler phase modulation mechanism on which the non-contact vital sign detection is based. The harmonic and intermodulation issues caused by the non-linear Doppler phase modulation will be discussed in detail. Analyses will illustrate the method for optimal design of radio frequency and radio architecture. The theory will be verified by both numerical simulations and experiments using a Ka-band bench top system.;Making use of the non-linear Doppler phase modulation, a new method and system for non-contact measurement of frequency and amplitude of mechanical vibration is invented in this chapter. With very simple radio architecture, this method does not need the calibration of signal amplitude and has the ability of self-verification.;The non-contact Doppler radar measurement system has been integrated in both printed circuit board and CMOS integrated chip levels. The design, implementation, and characterization of the integrated radar system will be introduced in the subsequent chapters.;As a main source of noise, the random body movement has been limiting the wide application of this technology. In Chapter 6, a random body movement cancellation technique will be introduced to cancel out the noise caused by random body movement. Both the complex signal demodulation and the arctangent demodulation will be studied for random body movement. Theoretical and experimental results will demonstrate the advantages of complex signal demodulation for random body movement cancellation.;As an advanced signal processing method for Doppler radar non-contact vital sign detection, the RELAX algorithm will be discussed and used in experiment. It will be shown that the RELAX algorithm in general succeeds in mitigating the effects of the smearing and leakage problems of the periodogram caused by limited data length.;Finally, an application case study of infant vital sign monitor will be presented. (Full text of this dissertation may be available via the University of Florida Libraries web site. Please check http://www.uflib.ufl.edu/etd.html)
机译：本文从非多普勒生命信号检测所基于的非线性多普勒相位调制机制的频谱分析开始。将详细讨论由非线性多普勒相位调制引起的谐波和互调问题。分析将说明用于射频和无线电架构的最佳设计的方法。该理论将通过使用Ka波段台式系统的数值模拟和实验进行验证。;利用非线性多普勒相位调制，一种用于非接触式测量机械振动的频率和振幅的新方法和系统在本章中发明。由于采用非常简单的无线电架构，该方法不需要校准信号幅度，并且具有自验证功能。;非接触式多普勒雷达测量系统已集成在印刷电路板和CMOS集成芯片级中。集成雷达系统的设计，实现和特性将在随后的章节中介绍。作为噪声的主要来源，随机的人体运动一直限制了该技术的广泛应用。在第六章中，将介绍一种随机身体运动消除技术，以消除由随机身体运动引起的噪声。复杂信号解调和反正切解调都将被研究用于随机运动。理论和实验结果将证明复杂信号解调在消除人体随机运动方面的优势。作为一种用于多普勒雷达非接触生命体征检测的先进信号处理方法，将讨论RELAX算法并将其用于实验中。可以证明，RELAX算法通常可以成功地缓解由于数据长度有限而引起的周期图的拖尾和拖尾问题的影响。 （可通过佛罗里达大学图书馆网站获得本文的全文。请检查http://www.uflib.ufl.edu/etd.html）

著录项

  • 作者

    Li, Changzhi.;

  • 作者单位

    University of Florida.;

  • 授予单位 University of Florida.;
  • 学科 Engineering Biomedical.;Engineering Electronics and Electrical.
  • 学位 Ph.D.
  • 年度 2009
  • 页码 129 p.
  • 总页数 129
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

  • 入库时间 2022-08-17 11:38:25

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