Complex path impedance estimation and matching requirements for body-coupled communication

• Capacitive body coupled communication (BCC) channel has been modeled as a two-port complex path impedance matrix [Z] which varies as a function of ten different body positions over the frequency range of 1 MHz to 60 MHz. A systematic numerical simulation methodology has been used to estimate [Z] parameters. The estimated complex path impedance [Z] is a symmetric matrix showing BCC channel is a reciprocal network of passive components for given coupler configuration, body positions and frequency range. The estimated complex path impedance has been utilized to determine either input impedance Zin or output impedance Zout to conjugately match to Zs at transmitter or Zl at receiver, respectively for maximum power transfer. It has been found that the resistive matching below 1000 O and inductive matching between 0.5 ï¿œH to 5 ï¿œH on any side of the two ports can meet the conjugate matching requirements for maximum power transfer for the given body positions and frequency range.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Elektroteknik och elektronik -- Signalbehandling (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Electrical Engineering, Electronic Engineering, Information Engineering -- Signal Processing (hsv//eng)

Nyckelord

biomedical communication;impedance matching;impedance matrix;numerical analysis;parameter estimation;radio receivers;radio transmitters;capacitive body coupled communication channel;complex path impedance estimation;conjugate matching requirements;coupler configuration;frequency 1 MHz to 60 MHz;inductive matching;parameter estimation;passive components;radio receiver;radio transmitter;reciprocal network;symmetric matrix;systematic numerical simulation;two-port complex path impedance matrix;Adaptation models;Estimation;Frequency estimation;Impedance;Mathematical model;Numerical models;Symmetric matrices

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