60 Mbps Time-Domain Video Transfer Using Body Communication

With the rapid advancement of the Internet of Bodies (IoB), a growing number of connected devices, such as health monitoring systems, smart glasses, and video sensor nodes, are being utilized around the human body. These devices typically require communication with a central high-power computing hub or among themselves. Conventional communication technologies like Bluetooth and WiFi, while widely adopted, suffer from high power consumption (<tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\sim 10\ \text{mW}-100 ~\text{mW}$</tex>) and suboptimal energy efficiency (<tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\sim 10-100$</tex> nJ/bit) for wearable systems. Recently, Electroquasistatic (EQS) Human Body Communication (HBC) has emerged as a promising alternative, offering both energy-efficient (<tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\sim 10-100$</tex> pJ/bit) and physically secure communication modalities. In the EQS regime, voltage-mode communication, typically employing On-Off Keying (OOK), is the most commonly used approach. However, higher-order modulation schemes in this mode increase transmitter switching power, which is still lower than Bluetooth and WiFi but demands higher receiver sensitivity. Alternatively, due to the wideband characteristics of the human body, the time information of transmitted signals can be effectively preserved. This paper explores time-domain communication through the human body, demonstrating the feasibility of achieving a 60 Mbps communication channel in a machine-to-machine TD-BC scenario. Additionally, we present the successful transmission of video data through the human body with a framewise SSIM of 0.9791 framewise, underscoring the potential of this approach for future IoB applications.