Title :
Sensor Nodes for Doppler Radar Measurements of Life Signs
Author :
Mostafanezhad, Isar ; Park, Byung-Kwon ; Boric-Lubecke, Olga ; Lubecke, Victor ; Host-Madsen, Anders
Author_Institution :
Univ. of Hawaii at Manoa, Honolulu
Abstract :
Human life signs can be detected at a distance using mono-static Doppler radars operating in the CW mode. Phase stability of the measurement system plays an important role in successful life signs detection. In this paper it will be shown that small unwanted mechanical motions of the transmit antenna, result in unrecoverable phase errors in the received signal. To overcome this issue, we propose to use a bi-static radar with a sensor node receiver placed in the vicinity of the human subject. Theoretical and experimental results confirm the benefits of using sensor nodes.
Keywords :
Doppler radar; biomedical measurement; medical signal processing; radar applications; signal detection; CW mode; Doppler radar measurement; biomedical monitoring; biomedical signal detection; bistatic radar; cardiopulmonary monitoring; human life signs; mechanical motion; monostatic Doppler radar; phase stability; range correlation; received signal; sensor node receiver; transmit antenna; Antenna measurements; Doppler radar; Humans; Mechanical sensors; Phase detection; Phase measurement; Radar detection; Receiving antennas; Stability; Transmitting antennas; Biomedical monitoring; Doppler radar; biomedical signal detection; range correlation; sensor nodes;
Conference_Titel :
Microwave Symposium, 2007. IEEE/MTT-S International
Conference_Location :
Honolulu, HI
Print_ISBN :
1-4244-0688-9
Electronic_ISBN :
0149-645X
DOI :
10.1109/MWSYM.2007.380392
