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A 7-µW 2.4-GHz wake-up receiver with -80 dBm sensitivity and high co-channel interferer tolerance

: Milosiu, H.; Oehler, F.; Eppel, M.; Fruehsorger, D.; Thoenes, T.


Institute of Electrical and Electronics Engineers -IEEE-:
IEEE Topical Conference on Wireless Sensors and Sensor Networks, WiSNet 2015. Proceedings : 25-28 January 2015, San Diego, California, USA
Piscataway, NJ: IEEE, 2015
ISBN: 978-1-4799-5519-0
ISBN: 978-1-4799-5506-0 (USB)
ISBN: 978-1-4799-5505-3 (CD-ROM)
Topical Conference on Wireless Sensors and Sensor Networks (WiSNet) <2015, San Diego/Calif.>
Conference Paper
Fraunhofer IIS ()

An ultra-low power wake-up receiver for 2.4-GHz wireless sensor networks, based on a fast sampling method, is presented. A novel multi-branch receiver architecture covers a wide range of interferer scenarios for highly occupied radio channels. The scalability of current consumption versus data rate at a constant sensitivity is another useful feature that fits a multitude of applications, requiring both short reaction times and ultra-low power consumption. The 2.4-GHz OOK receiver comprises a 3-branch analog superheterodyne front-end and six digital 31-bit correlating decoders. It is fabricated in a 130-nm CMOS technology. The current consumption is 2.9 μA at 2.5 V supply voltage and a reaction time of 30 ms. The receiver sensitivity is -80 dBm. Among other sub-100 μW state-of-the-art receivers, the presented implementation shows the best reported sensitivity.