Human Body Communication (HBC)

Channel Characterization of Magnetic Human Body Communication

Author(s): Erda Wen, Daniel F. Sievenpiper, Patrick P. Mercier
Channel Characterization of Magnetic Human Body Communication 170 177 IEEE Transactions on Biomedical Engineering (TBME)
This paper aims to validate, analytically and experimentally, the benefits of the magnetic human body communication (mHBC) method using small form-factor-accurate antennas operating under realistic conditions. We show that by adopting resonant coils that couple by magnetic-dominant near-field at a few hundreds of MHz, low path loss and extra robustness to antenna misalignment across the body can be achieved compared to conventional far-field RF schemes. In best-case scenarios, the mHBC channel exhibits 100000x better efficiency than Bluetooth utilizing antennas of similar sizes. The extremely high efficiency provides a potential solution to the ever-present energy problem for miniaturized wearables. read more

In-The-Wild Interference Characterization and Modelling for Electro-Quasistatic-HBC with Miniaturized Wearables

Author(s): David Yang, Parikha Mehrotra, Scott Weigand, Shreyas Sen
In-The-Wild Interference Characterization and Modelling for Electro-Quasistatic-HBC with Miniaturized Wearables 177 170 IEEE Transactions on Biomedical Engineering (TBME)
Electro Quasi-Static Human Body Communication (EQS-HBC) is an emerging communication technique that utilizes the conductive medium of the human body to achieve enhanced energy efficient and physically secure communication in comparison to traditional radio wave-based technologies like Bluetooth. This work presents 1) a thorough characterization of interference on the human body in day-to-day life and 2) develops a human body interference coupling biophysical model. The measurements provided in this paper can serve as a guide for device designs or future EQS-HBC studies as it provides understanding into coupling modalities of interference and accurate interference measurement techniques. read more