Authors:
Robert Fromm
;
Lydia Schott
and
Faouzi Derbel
Affiliation:
Faculty of Engineering, Leipzig University of Applied Sciences (HTWK), Wächterstraße 13, 04107 Leipzig, Germany
Keyword(s):
Wake-up Receiver (WuRx), Wireless Sensor Network (WSN), Ultra-Low Power (ULP), Collision Avoidance, Carrier Sensing, Energy Detection, Passive RF Architecture, Operational Amplifier (Op-Amp), Comparator, Schottky Diode, Envelope Detector.
Abstract:
For power-limited wireless sensor networks, energy efficiency is a critical concern. Receiving packages is proven to be one of the most power-consuming tasks in a WSN. To address this problem the asynchronous communication is based on wake-up receivers. The proposed receiver circuit can detect carrier signals inside the 868 MHz band. Reliable signal detection at 10 m was achieved with a total power consumption of 4.2 µW. Two use cases of this low-power receiver were introduced. First the wake-up receiver and second as a collision avoidance circuit. Because of its low power consumption savings of factor 7000 can be estimated compared to integrated solutions of commercially available radio transceivers.