Improving practical sensitivity of energy optimized wake-up receivers: Proof of concept in 65nm CMOS

Research output: Contribution to journalArticle

Abstract

We present a high performance low-power digital base-band architecture, specially designed for an energy optimized duty-cycled wake-up receiver scheme. Based on a careful wake-up beacon design, a structured wake-up beacon detection technique leads to an architecture that compensates for the implementation loss of a low-power wake-up receiver front-end at low energy and area costs. Design parameters are selected by energy optimization and the architecture is easily scalable to support various network sizes. Fabricated in 65nm CMOS, the digital base-band consumes 0:9μW (VDD = 0:37V) in sub-threshold operation at 250kbps, with appropriate 97% wake-up beacon detection and 0:04% false alarm probabilities. The circuit is fully functional at a minimum VDD of 0:23V at fmax = 5kHz and 0:018μW power consumption. Based on these results we show that our digital base-band can be used as a companion to compensate for front-end implementation losses resulting from the limited wake-up receiver power budget at a negligible cost. This implies an improvement of the practical sensitivity of the wake-up receiver, compared to what is traditionally reported.

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Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Electrical Engineering, Electronic Engineering, Information Engineering

Keywords

  • digital base-band, duty-cycled, medium access scheme, optimization, ultra-low power, wake-up receiver, Wireless sensor network
Original languageEnglish
Article number7562558
Pages (from-to)8158 - 8166
JournalIEEE Sensors Journal
VolumePP
Issue number99
Publication statusPublished - 2016
Publication categoryResearch
Peer-reviewedYes