Trading Sensitivity for Power in an IEEE 802.15.4 Conformant Adequate Demodulator

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Abstract

In this work, a design of an IEEE 802.15.4 con-formant O-QPSK demodulator is proposed, which is capable of trading off receiver sensitivity for power savings. Such design can be used to meet rigid energy and power constraints for many applications in the Internet-of-Things (IoT) context. In a Body Area Network (BAN), for example, the circuits need to operate with extremely limited energy sources, while still meeting the network performance requirements. This challenge can be addressed by the paradigm of adequate computing, which trades off excessive quality of service for power or energy using approximation techniques. Three different, adjustable approximation techniques are integrated into the demodulation to trade off effective signal quantization bit-width, filtering performance, and sampling frequency for power. Such approximations impact incoming signal sensitivity of the demodulator. For detailed trade-off analysis, the proposed design is implemented in a commercial 40-nm CMOS technology to estimate power and in Python to estimate sensitivity. Simulation results show up to 64% power savings by sacrificing \tilde 7 dB sensitivity.

Original languageEnglish
Title of host publicationProceedings of the 2020 Design, Automation and Test in Europe Conference and Exhibition, DATE 2020
EditorsGiorgio Di Natale, Cristiana Bolchini, Elena-Ioana Vatajelu
PublisherInstitute of Electrical and Electronics Engineers
Pages1674-1679
Number of pages6
ISBN (Electronic)9783981926347
DOIs
Publication statusPublished - Mar 2020
Event2020 Design, Automation and Test in Europe Conference and Exhibition, DATE 2020 - Grenoble, France
Duration: 9 Mar 202013 Mar 2020

Conference

Conference2020 Design, Automation and Test in Europe Conference and Exhibition, DATE 2020
CountryFrance
CityGrenoble
Period9/03/2013/03/20

Keywords

  • FIR Filter
  • Internet-of-Things
  • O-QPSK Demodulator
  • Wireless Networks

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