IEEE Open Journal of the Solid-State Circuits Society (Jan 2022)

Low-Power RF Wake-Up Receivers: Analysis, Tradeoffs, and Design

  • Patrick P. Mercier,
  • Benton H. Calhoun,
  • Po-Han Peter Wang,
  • Anjana Dissanayake,
  • Linsheng Zhang,
  • Drew A. Hall,
  • Steven M. Bowers

DOI
https://doi.org/10.1109/OJSSCS.2022.3215099
Journal volume & issue
Vol. 2
pp. 144 – 164

Abstract

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Wake-up receivers (WuRXs) offer a potentially energy-efficient means to enable asynchronous wake-up of higher power and higher performance radios without needing frequent (often energy-expensive) synchronization. Since WuRXs are typically on for a large percentage of the time, keeping their power consumption very low is critical to minimizing the total energy draw. However, this is difficult while maintaining good sensitivity, interference resiliency, and robustness, all with application-appropriate wake-up latencies and form factors. This article reviews the main challenges facing WuRXs, outlines the most popular WuRX architectures, and details essential design techniques and tradeoffs toward enabling utility in emerging applications.

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