Title :
A novel direct-conversion structure for non-contact vital sign detection system
Author :
Long, Jiang ; Gu, Changzhan ; Tao, Yong ; Huangfu, Jiangtao ; Qiao, S. ; Cui, W.Z. ; Ma, W. ; Ran, Lixin
Author_Institution :
Dept. of Info Sci. & Electron. Eng., Zhejiang Univ., Hangzhou
Abstract :
In this paper, an analysis on non-contact vital sign detection system is presented. It is concluded that the null point and dc-offset are related, so that the associated problems can be solved. Based on this principle, a novel structure of direct-conversion transceiver, which contains a tuneable phase shifter, is proposed to achieve a better performance. Two sets of simulations are employed to demonstrate the new structure. With this structure, dc-offset and null point can be eliminated and it is very easy to reach the optimal detection.
Keywords :
Doppler radar; medical signal detection; Doppler radar system; dc-offset; direct-conversion transceiver; noncontact vital sign detection system; null point; tuneable phase shifter; Calibration; Doppler radar; Heart beat; Microwave technology; Phase detection; Phase shifters; Radar detection; Radio frequency; Space technology; Transceivers;
Conference_Titel :
Antennas, Propagation and EM Theory, 2008. ISAPE 2008. 8th International Symposium on
Conference_Location :
Kunming
Print_ISBN :
978-1-4244-2192-3
Electronic_ISBN :
978-1-4244-2193-0
DOI :
10.1109/ISAPE.2008.4735459