Spatial carrier position modulation based multichannel capacitive link for bioelectronic implants

We present in this paper a multichannel capacitive-link intended for data transmission to biomedical electronic implants using spatial carrier position modulation (SCPM) communication scheme. This SCPM-based system is composed of a transmitter, an array of fabricated capacitor plates, and data and clock recovery receiver. Crosstalk between channels is investigated and solution is proposed. Characterization of capacitor plates and system modeling including skin are reported. 20Mbps data rate is achieved. The functionality of the system is validated using sheep´s skin placed between 4-capacitor plates which are coated with Parylene. Simulation and experimental results are presented.