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Article

A Highly Reliable, 5.8 GHz DSRC Wake-Up Receiver with an Intelligent Digital Controller for an ETC System

College of Information and Communication Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Korea
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Author to whom correspondence should be addressed.
Sensors 2020, 20(14), 4012; https://doi.org/10.3390/s20144012
Received: 18 June 2020 / Revised: 11 July 2020 / Accepted: 17 July 2020 / Published: 19 July 2020
(This article belongs to the Special Issue Integrated Circuits and Systems for Smart Sensory Applications)
In this article, a highly reliable radio frequency (RF) wake-up receiver (WuRx) is presented for electronic toll collection (ETC) applications. An intelligent digital controller (IDC) is proposed as the final stage for improving WuRx reliability and replacing complex analog blocks. With IDC, high reliability and accuracy are achieved by sensing and ensuring the successive, configurable number of wake-up signal cycles before enabling power-hungry RF transceiver. The IDC and range communication (RC) oscillator current consumption is reduced by a presented self-hibernation technique during the non-wake-up period. For accommodating wake-up signal frequency variation and enhancing WuRx accuracy, a digital hysteresis is incorporated. To avoid uncertain conditions during poor and false wake-up, a watch-dog timer for IDC self-recovery is integrated. During wake-up, the digital controller consumes 34.62 nW power and draws 38.47 nA current from a 0.9 V supply. In self-hibernation mode, its current reduces to 9.7 nA. It is fully synthesizable and needs 809 gates for its implementation in a 130 nm CMOS process with a 94 × 82 µm2 area. The WuRx measured power consumption is 2.48 µW, has −46 dBm sensitivity, and a 0.484 mm² chip area. View Full-Text
Keywords: wake-up receiver; digital controller; reliability; electronic toll collection (ETC) system; dedicated short range communication (DSRC) wake-up receiver; digital controller; reliability; electronic toll collection (ETC) system; dedicated short range communication (DSRC)
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MDPI and ACS Style

Ali, I.; Asif, M.; Rehman, M.R.U.; Khan, D.; Yingge, H.; Kim, S.J.; Pu, Y.; Yoo, S.-S.; Lee, K.-Y. A Highly Reliable, 5.8 GHz DSRC Wake-Up Receiver with an Intelligent Digital Controller for an ETC System. Sensors 2020, 20, 4012. https://doi.org/10.3390/s20144012

AMA Style

Ali I, Asif M, Rehman MRU, Khan D, Yingge H, Kim SJ, Pu Y, Yoo S-S, Lee K-Y. A Highly Reliable, 5.8 GHz DSRC Wake-Up Receiver with an Intelligent Digital Controller for an ETC System. Sensors. 2020; 20(14):4012. https://doi.org/10.3390/s20144012

Chicago/Turabian Style

Ali, Imran, Muhammad Asif, Muhammad R.U. Rehman, Danial Khan, Huo Yingge, Sung J. Kim, YoungGun Pu, Sang-Sun Yoo, and Kang-Yoon Lee. 2020. "A Highly Reliable, 5.8 GHz DSRC Wake-Up Receiver with an Intelligent Digital Controller for an ETC System" Sensors 20, no. 14: 4012. https://doi.org/10.3390/s20144012

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