Exploiting Concurrent Wake-Up Transmissions Using Beat Frequencies
AbstractWake-up receivers are the natural choice for wireless sensor networks because of their ultra-low power consumption and their ability to provide communications on demand. A downside of ultra-low power wake-up receivers is their low sensitivity caused by the passive demodulation of the carrier signal. In this article, we present a novel communication scheme by exploiting purposefully-interfering out-of-tune signals of two or more wireless sensor nodes, which produce the wake-up signal as the beat frequency of superposed carriers. Additionally, we introduce a communication algorithm and a flooding protocol based on this approach. Our experiments show that our approach increases the received signal strength up to 3 dB, improving communication robustness and reliability. Furthermore, we demonstrate the feasibility of our newly-developed protocols by means of an outdoor experiment and an indoor setup consisting of several nodes. The flooding algorithm achieves almost a 100% wake-up rate in less than 20 ms. View Full-Text
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Kumberg, T.; Schindelhauer, C.; Reindl, L. Exploiting Concurrent Wake-Up Transmissions Using Beat Frequencies. Sensors 2017, 17, 1717.
Kumberg T, Schindelhauer C, Reindl L. Exploiting Concurrent Wake-Up Transmissions Using Beat Frequencies. Sensors. 2017; 17(8):1717.Chicago/Turabian Style
Kumberg, Timo; Schindelhauer, Christian; Reindl, Leonhard. 2017. "Exploiting Concurrent Wake-Up Transmissions Using Beat Frequencies." Sensors 17, no. 8: 1717.
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