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Concurrent Vital Sign and Position Sensing of Multiple Individuals Using Self-Injection-Locked Tags and Injection-Locked I/Q Receivers With Arctangent Demodulation

机译:使用自注射锁定标签和具有反正切解调功能的注射锁定I / Q接收器同时进行多个人的生命体征和位置感知

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摘要

[[abstract]]This work presents a wireless system that operates in the 2.4 GHz ISM band for concurrently sensing the vital signs and positions of multiple individuals. Characterized by low complexity and high accuracy, the proposed system consists of two main parts. One is a self-injection-locked (SIL) tag carried by a subject, which emits a sinusoidal frequency-modulated (SFM) signal with vital sign information. The other is a group of injection-locked (IL) I/Q receivers, which performs arctangent demodulation of the SFM signal to obtain the position information without using RF reference signals, and simultaneously extracts the vital sign information of the subject. In the experiment, the system is capable of sensing multiple individuals based on frequency division multiple access (FDMA) technique. Moreover, fidgeting effect on the detection of vital signs has been greatly reduced by a spectral product approach. Accordingly, it is demonstrated that the experimental prototype provides accurate information about the vital signs and positions of different individuals in an indoor environment.
机译:[[摘要]]这项工作提出了一个在2.4 GHz ISM频段运行的无线系统,用于同时感应多个人的生命体征和体位。该系统具有低复杂度和高精度的特点,由两个主要部分组成。一种是由受试者携带的自注射锁定(SIL)标签,该标签会发出带有生命体征信息的正弦调频(SFM)信号。另一个是一组注入锁定(IL)I / Q接收器,它们在不使用RF参考信号的情况下执行SFM信号的反正切解调以获得位置信息,并同时提取对象的生命体征信息。在实验中,该系统能够基于频分多址(FDMA)技术感应多个个体。此外,光谱产物方法大大降低了对生命体征检测的烦躁影响。因此,证明了实验原型提供了关于室内环境中不同个体的生命体征和位置的准确信息。

著录项

  • 作者

    Wang, Fu-Kang;

  • 作者单位
  • 年度 2014
  • 总页数
  • 原文格式 PDF
  • 正文语种 en
  • 中图分类

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