Volume 9 Issue 2
A Tuned-RF Duty-Cycled Wake-Up Receiver with −90 dBm Sensitivity
Sadok Bdiri, Faouzi Derbel and Olfa Kanoun
1Department of Electrical Engineering and Information Technology, Leipzig University of Applied Sciences, Wächter Street 13, 04107 Leipzig, Germany
2Department of Electrical Engineering and Information Technology, Chemnitz University of Technology, Reichenhainer Street 70, 09126 Chemnitz, Germany
*Author to whom correspondence should be addressed.
Abstract
A novel wake-up receiver for wireless sensor networks is introduced. It operates with a modified medium access protocol (MAC), allowing low-energy consumption and practical latency. The ultra-low-power wake-up receiver operates with enhanced duty-cycled listening. The analysis of energy models of the duty-cycle-based communication is presented. All the WuRx blocks are studied to obey the duty-cycle operation. For a mean interval time for the data exchange cycle between a transmitter and a receiver over 1.7
s and a 64-bit wake-up packet detection latency of 32 ms, the average power consumption of the wake-up receiver (WuRx) reaches down to 3 μW. It also features scalable addressing of more than 512 bit at a data rate of 128kbit/s−1. At a wake-up packet error rate of 10−2, the detection sensitivity reaches a minimum of −90 dBm
. The combination of the MAC protocol and the WuRx eases the adoption of different kinds of wireless sensor networks. In low traffic communication, the WuRx dramatically saves more energy than that of a network that is implementing conventional duty-cycling. In this work, a prototype was realized to evaluate the intended performance.
Keywords:fast settling; wake-up receivers; event-triggered; on-demand; ultra-low power; MAC