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Abstract
This article presents a low-power wireless narrowband (NB) transceiver consisting of a 434-MHz NB transmitter (NBTX) and a 434-MHz NB receiver (NBRX) implemented in 0.18 μ m CMOS. The NBTX utilizes differential pulse-position modulation (DPPM) to decrease consumed energy per bit (EPB) by up to 67% compared to on-off keying (OOK). The packet error performance of DPPM with a soft-decision decoding scheme is analyzed. According to the results, the packet error ratio (PER) does not deteriorate compared to OOK except at very low signal-to-noise levels. The lowest power consumption of the NBTX is 8.3 μ W when DPPM data is transmitted continuously. Utilizing packet-mode transmission, the average power consumption is 67 nW at a data rate of 4.8 kbps. The transmitted data was received with a PER of 0.1% by a receiver placed at a 30-meter distance from the NBTX. With a higher power consumption of 2.5 μ W at the same data rate, the estimated line-of-sight (LOS) uplink range is up to 200 meters. The NBRX is a mixer-first uncertain-IF receiver. A temperature-compensated ring oscillator (TCRO) is utilized as a local oscillator. Its measured deviation of frequency is from +0.1% to -1.2% over a temperature range from -40 to +85 °C. The NBRX utilizes Manchester encoding and the sensitivity is -87 to -82 dBm over the temperature range at a data rate of 40 kbps. The NBRX consumes 85 μ W.
Original language | English |
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Article number | 9161276 |
Pages (from-to) | 5468-5481 |
Number of pages | 14 |
Journal | IEEE Transactions on Circuits and Systems I: Regular Papers |
Volume | 67 |
Issue number | 12 |
DOIs | |
Publication status | Published - Dec 2020 |
MoE publication type | A1 Journal article-refereed |
Keywords
- differential pulse-position modulation
- energy efficiency
- hard-decision
- Internet of Things
- Narrowband
- on-off keying
- receiver
- ring oscillator
- soft-decision
- temperature compensation
- transceiver
- transmitter
- uncertain-IF
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Dive into the research topics of 'Low-Power Wireless Transceiver with 67-nW Differential Pulse-Position Modulation Transmitter'. Together they form a unique fingerprint.Projects
- 2 Finished
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TDP 2017
Halonen, K., Saarinen, V., Pulkkinen, M., Moayer, M. M., Haapala, T. & Salomaa, J.
01/01/2017 → 31/12/2018
Project: Business Finland: Other research funding
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NAKU
Halonen, K., Moayer, M. M., Pulkkinen, M., Salomaa, J. & Haapala, T.
01/03/2015 → 30/06/2018
Project: Business Finland: Strategic research openings