Ultrasonic Backscatter Communication for Brain Implants

Mathematical Model, Simulation, and Measurement

Conference paper (2021)

Authors

Magnus N. Christensen Aarhus University
Milad Zamani Aarhus University
A. Rashidi Bio-Electronics - EEMCS
Farshad Moradi Aarhus University
Research Group
Bio-Electronics (EEMCS) (TU Delft)
Ultrasound Reflections Backscatter Amplitude shift keying Implantable devices Load shift keying
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Published Date

2021

Language

English

Reuse Rights

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Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Microelectronics

Research Group

Bio-Electronics

Abstract

In this paper, we present a mathematical and simulational model of an ultrasound backscattering communication link for 1 mm3 mm-sized brain implants. The mathematical model and different simulations are validated by measurement. Furthermore, using a piezoelectric crystal and an ultrasound transducer in a water tank setup, two different ultrasound reflection-based modulation methods are presented and measurement results are discussed. We compare the model, simulation, and measurement to gain a better understanding of the channel response. The results shows the possibility of achieving a bandwidth of up to 140 kb/s using binary modulation and 280 kb/s with 4-level ASK.