Toward an Embedded OFDM-based System for Living Cells Study byElectrochemical Impedance Spectroscopy

International audienceThe following article introduces a wireless anportable system for Electrochemical Impedance Spectroscopy(EIS) sensing based on the Orthogonal Frequency-DivisionModulation (OFDM). This technique is derived from multicarrierdigital communication methods and due to itsproperties of flat spectrum, fast generation and low-foot printmemory, the OFDM technique for EIS seems to be a realalternative to traditional ones. The manufacture of the OFDMEISsystem is under the framework of the electrical sensing offibrosis induced by medium to long-term active implants, giventhat the detection of fibrous tissues surrounding the electrode,that usually affect the operation of the implant, is an openresearch problem. Because of this, this article defines itsperformance on living cells under in-vitro experimentationwhere the proliferation of cells are matched with the results.Furthermore, traditional EIS techniques, such as frequencysweep and multi-sine are compared to OFDM-EIS