By Mir Hojjat Seyedi, Daniel Lai
This monograph explores Intrabody conversation (IBC) as a unique non-RF instant information conversation process utilizing the human physique itself because the conversation channel or transmission medium. specifically, the e-book investigates Intrabody conversation contemplating limb joint results in the transmission frequency variety 0.3-200 MHz.
Based on in-vivo experiments which ensure the results of dimension, occasions, and destinations of joints at the IBC, the e-book proposes a brand new IBC circuit version explaining elbow joint results. This version not just takes the limb joint results of the physique under consideration but additionally considers the impression of dimension gear in better frequency band therefore predicting sign attenuation habit over wider frequency levels. ultimately, this paintings proposes transmitter and receiver architectures for intrabody verbal exchange. A carrier-free scheme in response to impulse radio for the IBC is carried out on a FPGA.
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Extra resources for A Novel Intrabody Communication Transceiver for Biomedical Applications
They employed the default meshing option provided by COMSOL Multiphysics to model the arm geometry of the human body. 0 dB/cm in attenuation. 0 k–100 MHz. However, a major drawback with this method is the large size and the complexity of the human body which can significantly reduce the simulation accuracy . Among different methods for channel modeling, the equivalent circuit model contains a few number of elements. However, the FEM is created from arbitrary number of nodes (more than thousands) to construct only one mesh.
Although, there is encouraging progress in human body modeling, large discrepancies still exist between empirical results and model predictions. There are different methods for human body channel modeling, including electric equivalent circuit models which are based on parametric model of human tissues, numerical simulations such as finite element models (FEM) and finite difference time domain (FDTD) models. Transmission propagation models have been frequently used to guide RF transceiver designs , and tissue-specific models are expected to be applied similarly in the IBC field to future IBC transceiver design.
A more common method is presenting the circuit model by considering a constant phase element (CPE) with a complex valued impedance given by Z C∗ P E = A( jω)−n where A is a constant and n = α. This CPE impedance reduces to a simple resistance for n = 0 and to a capacitance reactance for n = 1. The physical meaning of the CPE is not clearly understood . The model representation of resistive and capacitive elements appears to explain the empirical measurements well. However, determining the exact tissue components responsible for these properties is complicated by the non-homogeneous nature of tissue and randomly distributed cells sizes.
A Novel Intrabody Communication Transceiver for Biomedical Applications by Mir Hojjat Seyedi, Daniel Lai