DocumentCode :
1828184
Title :
Design Guidelines for Radio Frequency Non-contact Vital Sign Detection
Author :
Changzhi Li ; Yanming Xiao ; Jenshan Lin
Author_Institution :
Univ. of Florida, Gainesville
fYear :
2007
fDate :
22-26 Aug. 2007
Firstpage :
1651
Lastpage :
1654
Abstract :
The design guidelines for non-contact vital sign detection are presented in this paper. Firstly, the choice of radio frequency and antenna beamwidth is demonstrated by numerical simulation based on ray-tracing technique and spectrum analysis. Guided by the numerical results of the first part, three typical radar architectures are recently built in one of the ISM bands (the 5.8 GHz band). The characteristics of each architecture are demonstrated and compared based on measurement results. Experiments show that direct-conversion non-quadrature architecture has DC offset and null detection point problem; direct-conversion quadrature architecture can eliminate null detection point but lead to complexity and higher power consumption in effectively combining two quadrature channels. Double-sideband indirect-conversion with simpler radio architecture and less baseband requirement can effectively alleviate the DC offset and null detection point problems.
Keywords :
Doppler radar; medical signal detection; ray tracing; antenna beamwidth; direct-conversion quadrature architecture; double-sideband indirect-conversion; null detection point problem; radio frequency non-contact vital sign detection; ray-tracing technique; spectrum analysis; Baseband; Guidelines; Heart beat; Phase detection; Radar antennas; Radar detection; Radio frequency; Ray tracing; Signal detection; Transfer functions; Computer Simulation; Computer-Aided Design; Electrocardiography; Equipment Design; Equipment Failure Analysis; Heart Rate; Humans; Microwaves; Models, Biological; Monitoring, Ambulatory; Respiratory Function Tests; Respiratory Mechanics;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Engineering in Medicine and Biology Society, 2007. EMBS 2007. 29th Annual International Conference of the IEEE
Conference_Location :
Lyon
ISSN :
1557-170X
Print_ISBN :
978-1-4244-0787-3
Type :
conf
DOI :
10.1109/IEMBS.2007.4352624
Filename :
4352624
Link To Document :
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