DIRECT CONVERSION DOPPLER RADAR VITAL SIGN DETECTION SYSTEM USING POWER MANAGEMENT TECHNIQUE

作者：Lee, Chie In^*; Lin, Yan Ting; Chen, Jhih Jie; Lin, Wei Cheng

来源：Microwave and Optical Technology Letters, 2014, 56(9): 2167-2174.

DOI：10.1002/mop.28505

• power management technique
• Doppler radar
• phase shifter
• noise
• biomedical monitoring

This article is the first to present a low power consumption direct conversion Doppler radar vital sign detection system using a power management technique to detect biomedical signals. The optimal pulse bias with simultaneous switching noise considered was designed to decrease power consumption of the sensor. A noncontact vital sign detection measurement using the optimal pulse bias was performed on a human subject. Based on experimental results, the presented simple and low power system can accurately detect human cardiopulmonary activity, including respiration and heartbeat. Calculated physiological signal amplitudes based on a spectral analysis validates the detection result from presented work. When compared with the sensor using a power amplifier, the proposed sensor can achieve low power dissipation for biomedical monitoring and green energy applications.

• 出版日期2014-9
• 单位中山大学