A 0.67mW 14.55Mbps OFDM-based sensor node transmitter for body channel communications

Tsan Wen Chen*, Ping Yuan Tsai, Jui Yuan Yu, Chen-Yi Lee

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

6 Scopus citations

Abstract

This paper presents an energy-efficient sensor node transmitter for body channel communication (BCC) system. The OFDM modulation is adopted in this work to achieve both high transmission data rate and spectrum efficiency. To reduce the power dissipation of the front-end (FE) circuits, a phase-modulated outphasing architecture is applied to avoid the power-hungry data converters and linear amplifier. Besides, the voltage scaling and balanced source gating (BSG) schemes are proposed to save the circuit active power, resulting in 81.3% reduction. The proposed sensor node transmitter chip is manufactured in 90 nm standard CMOS process with a die area 1.1016 mm 2. The proposed BCC system is operated at 40 / 80 MHz with 10 MHz signal bandwidth, and the maximum data rate of 14.55 Mbps with 0.67 mW power dissipation can be achieved, leading to 0.05 nJ/b transmission energy and 1.46 bps/Hz spectral efficiency.

Original languageEnglish
Title of host publication2011 Proceedings of Technical Papers
Subtitle of host publicationIEEE Asian Solid-State Circuits Conference 2011, A-SSCC 2011
Pages189-192
Number of pages4
DOIs
StatePublished - 1 Dec 2011
Event7th IEEE Asian Solid-State Circuits Conference, A-SSCC 2011 - Jeju, Korea, Republic of
Duration: 14 Nov 201116 Nov 2011

Publication series

Name2011 Proceedings of Technical Papers: IEEE Asian Solid-State Circuits Conference 2011, A-SSCC 2011

Conference

Conference7th IEEE Asian Solid-State Circuits Conference, A-SSCC 2011
CountryKorea, Republic of
CityJeju
Period14/11/1116/11/11

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