A Wireless Somatosensory Feedback System Using Human Body Communication

Hao, Han; Liu, Hangxing; Spiegel, Jan Van der; Aflatouni, Firooz

doi:10.1109/jssc.2022.3143462

Cited by 6 publications

(1 citation statement)

References 37 publications

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“…In contrast, by using the body as a forward transmission path and the parasitic capacitance as the return path, the capacitive body-coupled approach is shown to have an advantageous on-body path loss while being insusceptible to the body shadowing effect [3], [4], [5], [6], [7]. In spite of channel variations when coupling condition changes, by leveraging on the advantageous body path loss, the body-coupled communication (BCC) could enable lower energy per bit [8], [9], [10], [11], [12], [13], whereas the body-coupled powering (BCP) could enable higher power efficiency and wider body area power coverage [14], [15], [16], [17], [18], [19].…”

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confidence: 99%

Concurrent Body-Coupled Powering and Communication ICs With a Single Electrode

Li,

Dong,

Lin

et al. 2024

IEEE J. Solid-State Circuits

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Body-coupled powering (BCP) and body-coupled communication (BCC) utilize the human body channel as the wireless transmission medium, which shows less path loss around the body area. However, integrating both BCP and BCC requires multiple electrodes or alternating the uplink and downlink in the time domain, due to signal interferences and backflow between different paths. To address this issue, we propose a base station (BS) IC and a sensor node (SN) IC with BCP and BCC concurrency. At the BS, the adaptive self-interference cancellation (SI-C) structure suppresses the output signals that are coupled at the data receiver, enabling the concurrent uplink data recovery and downlink power delivery. At the SN, the ground domain of the uplink data path is separated from that of the downlink power/data path to suppress leakage between the paths. For regulated power supply in different ground domains, the cross-ground-domain power converter is designed with 89.1% efficiency. The ICs are implemented in a 40-nm 1P8M standard CMOS process, and BCC + BCP concurrent operations are successfully validated.Index Terms-Body-coupled communication (BCC), bodycoupled powering (BCP), power-data co-transfer, power-data concurrency, wireless body-area network (BAN). I. INTRODUCTIONB ODY-AREA network (BAN) empowers the cooperated sensing, recognition, and stimulation of bio-signals distributed around the body area [1]. However, on the one hand, the increasing need for downlink (e.g., for remote control and coordination) and uplink communication (e.g., for multisite sensing) incurs additional power overhead. On the other hand, the need for miniaturized form factor (e.g., for user comfort) further limits the on-chip energy, demanding wireless Manuscript

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