An Instruments-built Doppler Radar for Sensing Vital Signs
In this paper,we presented a fast solution to construct a Doppler radar system used for detecting vital signs by noncontact means.The radar system is constructed by instruments which are widely used and equipped in radio frequency and communication laboratories.Therefore,this work demonstrates the feasibility to conduct research on vital sign detection in ordinary radio frequency laboratories,while the existing vital sign detection systems must cost much effort to build.Digital IF technique is applied to help mitigate quadrature channel imbalance occurring in the quadrature radio architecture,and eliminate the complicated DC offset calibration required for arctangent demodulation.A 2.4GHz microchip patch antenna array was designed and used to carry out extensive experiments.When the transmit power is 0dBm,the detection range extends to 2.5m,with an accuracy of higher than 80％.
Changzhan Gu Jiang Long Jiangtao Huangfu S.Qiao W.Z.Cui W.Ma Lixin Ran
Department of Info Science & Electronic Engineering,Zhejiang UniversityHangzhou,310027,Zhejiang,Chin Zhejiang University City College,Zhejiang University Hanzhou 310027,China National Key Laboratory of Space Microwave Technology,Xian Institute of Space Radio Technology Xia Department of Info Science & Electronic Engineering,Zhejiang University Hangzhou,310027,Zhejiang,Chi
国际会议
昆明
英文
2008-11-01（万方平台首次上网日期，不代表论文的发表时间）