Title | ||
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A Low-Power Backscatter Modulation System Communicating Across Tens of Meters With Standards-Compliant Wi-Fi Transceivers |
Abstract | ||
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This article presents the first integrated circuit designed to enable low-power backscatter communication with commodity Wi-Fi transceivers. The developed chip operates by receiving a series of packets generated from a Wi-Fi access point (AP), which feeds into a low-power energy-detecting wakeup receiver that determines when backscatter communication should commence. Then, the Wi-Fi AP sends an additional packet that is intended to be backscatter modulated. To accomplish this, the antenna receiving the incident Wi-Fi packet is terminated by a dynamically varying collection of complex impedances via a crystal-stabilized multi-phase local oscillator driven by a single-sideband (SSB) mixer, which ultimately performs SSB quadrature phase shift-keying (QPSK) modulation with frequency-translation to a separate Wi-Fi channel for reception by a second Wi-Fi AP. Implemented in 65-nm CMOS, the downlink wake-up receiver consumes 2.8 μW and achieves a sensitivity of -42.5 dBm, which is good enough for >30 m wakeup range, while the backscattering uplink consumes 28 μW and achieves 17 dB of image rejection. Wireless tests reveal a range of 21 m when the developed IC is placed symmetrically between Wi-Fi access points (APs), and a range of >90 m when the developed IC is placed within 1 m of the transmitting Wi-Fi AP. |
Year | DOI | Venue |
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2020 | 10.1109/JSSC.2020.3023956 | IEEE Journal of Solid-State Circuits |
Keywords | DocType | Volume |
24-GHz band,backscatter communication,image rejection,Internet-of-Things (IoT),low-power wireless,RFID,single-sideband (SSB),wake-up radios,wake-up receivers (WuRXs),Wi-Fi | Journal | 55 |
Issue | ISSN | Citations |
11 | 0018-9200 | 0 |
PageRank | References | Authors |
0.34 | 7 | 6 |
Name | Order | Citations | PageRank |
---|---|---|---|
Po-Han Peter Wang | 1 | 11 | 5.10 |
Chi Zhang | 2 | 145 | 44.61 |
Hongsen Yang | 3 | 0 | 0.68 |
Manideep Dunna | 4 | 0 | 0.34 |
Dinesh Bharadia | 5 | 822 | 47.06 |
Patrick P. Mercier | 6 | 205 | 37.70 |