Data acquisition system for Doppler radar vital-sign monitor

被引：4

作者：

Vergara, Alexander M. ^{[1
]}

Lubecke, Victor M. ^{[2
]}

机构：

[1] Univ Hawaii Manoa, Honolulu, HI 96822 USA

[2] Univ Hawaii Manoa, Dept Elect Engn, Honolulu, HI 96822 USA

来源：

2007 ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY, VOLS 1-16 | 2007年

关键词：

D O I：

10.1109/IEMBS.2007.4352777

中图分类号：

R318 [生物医学工程];

学科分类号：

0831 ;

摘要：

Automatic gain control (AGC) units increase the dynamic range of a system to compensate for the limited dynamic range of analog to digital converters. This problem is compounded in wireless systems in which large changes in signal strength are effects of a changing environment. These issues are evident in the direct-conversion Doppler radar vital-sign monitor. Utilizing microwave radar signals reflecting off a human subject, a two-channel quadrature receiver can detect periodic movement resulting from cardio-pulmonary activity. The quadrature signal is analyzed using an arctangent demodulation that extracts vital phase information. A data acquisition (DAQ) system is proposed to deal with issues inherent in arctangent demodulation of a quadrature radar signal.

引用

页码：2269 / +

页数：2

共 4 条

[1] Range correlation and I/Q performance benefits in single-chip silicon Doppler radars for noncontact cardiopulmonary monitoring [J].