A low power 24 GHz radar system for occupancy monitoring

This paper presents a low power 24GHz Doppler radar system for presence detection and occupancy monitoring. It is based on a minimalistic hardware approach and is able to wirelessly sense human respiratory signals so that even non-moving persons can be detected. By intermittently measuring, the average power consumption could be significantly reduced down to e.g. 0.2mW for 20 measurements per second. Experiments verify that, due to the short wavelength, the single channel receiver limitations can be neglected when only a detection of human respiratory but no evaluation of the breathing frequency is necessary.

[1]  Olga Boric-Lubecke,et al.  Doppler radar sensor for occupancy monitoring , 2013, 2013 IEEE Topical Conference on Biomedical Wireless Technologies, Networks, and Sensing Systems.

[2]  Dietmar Kissinger,et al.  A compact back-plaster sensor node for dementia and Alzheimer patient care , 2014, 2014 IEEE Sensors Applications Symposium (SAS).

[3]  R. Weigel,et al.  A microwave interferometer based contactless quasi-TEM waveguide position encoder with micrometer accuracy , 2014, 2014 IEEE MTT-S International Microwave Symposium (IMS2014).

[4]  Jenshan Lin,et al.  Range correlation and I/Q performance benefits in single-chip silicon Doppler radars for noncontact cardiopulmonary monitoring , 2004, IEEE Transactions on Microwave Theory and Techniques.

[5]  Olga Boric-Lubecke,et al.  System-on-Chip based Doppler radar occupancy sensor , 2011, 2011 Annual International Conference of the IEEE Engineering in Medicine and Biology Society.

[6]  Chenyan Song,et al.  Detection sensitivity and power consumption vs. operation modes using system-on-chip based Doppler radar occupancy sensor , 2012, 2012 IEEE Topical Conference on Biomedical Wireless Technologies, Networks, and Sensing Systems (BioWireleSS).