A Synchronized Multi-Node Wireless Body Area Network Powered by RF Energy Harvesting
Dr. Lingli Xia, Dept. of EE, Oregon State Univ., USA
时间：2011年12月5日（星期一）上午10：30
地点：清华大学东主楼9区115会议室
Abstract：The simultaneous acquisition of multiple vital signs from the human body, such as ECG, EEG, EMG, pulse oximetry and temperature, will be a key differentiating feature for next generation wireless body area network (WBAN) systems. Energy-efficient designs have been previously demonstrated that optimize an individual wireless sensor node for low power operation. However, the necessary scheme for synchronizing multiple nodes operating coherently with an off-body central base station has been largely overlooked. Besides this, traditional wearable wireless sensors require a battery that further increases each sensor node’s size, weight and cost. We demonstrate experimentally, a batteryless, multi-node WBAN system that features: (1) wireless energy harvesting using power broadcast from a base station such as a smart phone; (2) duty-cycling and TDMA synchronization of multiple nodes by employing injection-locked wireless clock distribution.
Biography：Dr. Lingli Xia received the B.S. degree in electronics science and technology in 2005 from Huazhong University of Science and Technology, Wuhan, China and the Ph.D. Degree in microelectronics and solid state electronics in 2010 from Fudan University, Shanghai, China. Her doctoral thesis concerns impulse radio ultra wideband RF transceiver design. She is currently a postdoctor in electrical engineering at Oregon State University. Her research interests include RF front-end circuits and digital baseband circuits for wireless communication systems and biomedical applications.