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Related Experiment Video

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Implantation and Control of Wireless, Battery-free Systems for Peripheral Nerve Interfacing
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Multi-Access Networking with Wireless Ultrasound-Powered Implants.

Ting Chia Chang1, Max Wang1, Amin Arbabian1

  • 1Electrical Engineering, Stanford University, Stanford, CA, 94305, USA.

IEEE Biomedical Circuits and Systems Conference : Healthcare Technology : [Proceedings]. IEEE Biomedical Circuits and Systems Conference
|January 29, 2020
PubMed
Summary
This summary is machine-generated.

Miniaturized wireless implantable devices using ultrasound (US) enable advanced medical applications. This study demonstrates multi-access networking for these devices, achieving reliable wireless powering and data communication for precise diagnosis and treatment.

Keywords:
beamformingfrequency-division multiplexingmulti-access networkingspatial multiplexingtime-division multiplexingultrasonic power transferwireless implants

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Area of Science:

  • Biomedical Engineering
  • Implantable Devices
  • Wireless Communication

Background:

  • Miniaturized wireless implantable devices are crucial for closed-loop medical applications.
  • Ultrasound (US) offers advantages for wireless powering and communication with implants due to its beamforming capabilities.
  • Efficient multi-access networking is needed to connect multiple implants.

Purpose of the Study:

  • To demonstrate the feasibility of multi-access networking for wirelessly powered miniaturized implantable devices using ultrasound.
  • To validate efficient wireless powering and bidirectional communication for multiple implants.
  • To assess data communication performance using various multiplexing schemes.

Main Methods:

  • Utilized mm-sized implants with bidirectional communication links, wirelessly powered by ultrasound.
  • Implemented time, spatial, and frequency-division multiplexing schemes for uplink data communication.
  • Employed a 32-channel linear transmitter array as a base station to network with two implants at 6.5 cm depth.

Main Results:

  • Achieved successful wireless powering of implants.
  • Demonstrated uplink data communication at approximately 100 kbps.
  • Measured a bit error rate below 10-4 for all tested networking schemes.

Conclusions:

  • Validated the multi-access networking feasibility of ultrasound wireless implant systems.
  • Confirmed efficient wireless powering and reliable data communication for miniaturized implants.
  • Paved the way for advanced closed-loop medical applications using networked implants.