Ultrasonic Backscatter Communication for Implantable Medical Devices

This paper proposes an ultrasonic backscatter communication (UsBC) system for passive implantable medical devices (IMDs) that can operate without batteries, enabling versatile revolutionary applications for future healthcare. The proposed UsBC system consists of a reader and a tag. The reader sends...

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Bibliographic Details
Published in:IEEE transactions on molecular, biological, and multi-scale communications biological, and multi-scale communications, 2022-12, Vol.8 (4), p.292-296
Main Authors: Wang, Qianqian, Guan, Quansheng, Cheng, Julian, Tang, Yuankun
Format: Article
Language:English
Subjects:
Acoustic applications
Backscatter
Backscattering
Bit error rate
codeword matching
Communications systems
Electronic implants
energy detection
Energy efficiency
Impedance matching
Interference
Interrogation
intra-body communication
Medical devices
Medical electronics
Modulation
piezoelectric effect
Piezoelectricity
Radio frequency
Switches
Transducers
Ultrasonic backscatter communication
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Summary:This paper proposes an ultrasonic backscatter communication (UsBC) system for passive implantable medical devices (IMDs) that can operate without batteries, enabling versatile revolutionary applications for future healthcare. The proposed UsBC system consists of a reader and a tag. The reader sends interrogation pulses to the tag. The tag backscatters the pulses based on the piezoelectric effect of a piezo transducer. We present several basic modulation schemes for UsBC by impedance matching of the piezo transducer. To mitigate the interference of other scatters in the human body, the tag transmits information bits by codeword mapping, and the reader performs codeword matching before energy detection in the reader. We further derive the theoretical bit-error rate (BER) expression. Monte Carlo simulations verify the theoretical analysis and show that the passive UsBC can achieve low BER and low complexity, which is desirable for size- and energy-constrained IMDs.
ISSN:2372-2061
2332-7804
2372-2061
DOI:10.1109/TMBMC.2022.3182572