Title page for etd-0615113-120612


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URN etd-0615113-120612
Author Chia-Hui Fang
Author's Email Address m003010027@student.nsysu.edu.tw
Statistics This thesis had been viewed 5560 times. Download 313 times.
Department Electrical Engineering
Year 2012
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title Localization of Vital Signs in Indoor Surroundings Using an Active Tag with a Self-Injection-Locked Oscillator
Date of Defense 2013-07-04
Page Count 69
Keyword
  • Self-injection-locked (SIL) oscillator
  • active tag
  • injection-locked (IL) I/Q receiver
  • wireless indoor positioning
  • arctangent demodulation
  • vital sign detection
  • Abstract This thesis aims to develop a wireless sensing system for use at 2.4 GHz ISM band in detection of the vital signs and indoor locations of the target subjects. The sensor, an active tag with a self-injection-locked (SIL) oscillator, transmits the carrier signal that is frequency-modulated (FM) by the Doppler signal of the cardiopulmonary activity and the tuning voltage signal of the SIL oscillator; the injection-locked (IL) I/Q receivers perform arctangent demodulation of the FM signal to obtain the subjects’ vital signs and position information. The SIL technology ensures high sensitivity of vital sign detection while the IL I/Q receivers locate the targets without using reference signals. The designed system achieves a minimum of 10 cm location error within an 8-by-8 meter square area in an indoor environment. In the experiment, the frequency division multiple access technology is employed to detect different subjects. Moreover, fidgeting effect on the detection of vital signs has been greatly reduced by a spectral product approach.
    Advisory Committee
  • Sheng-Ful Chang - chair
  • Kang-Chun Peng - co-chair
  • Ken-Huang Lin - co-chair
  • Huey-Ru Chuang - co-chair
  • Tzyy-Sheng Horng - advisor
  • Files
  • etd-0615113-120612.pdf
  • Indicate in-campus at 5 year and off-campus access at 5 year.
    Date of Submission 2013-07-15

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