Extended Noisy-Channel Models for Capacitively Coupled Personal Area Network Under Influence of a Wall

Many application systems of capacitively coupled personal area networks (CC-PANs) are installed in the vicinity of walls. We therefore investigated noisy-channel models of a CC-PAN in consideration of a wall and a noise-reduction mechanism (NRM). Equivalent circuits representing the proposed channel models can be reduced to a Wheatstone bridge. It is found from the model that the noise is suppressed when the Wheatstone bridge is balanced. In practical CC-PAN systems, such a balanced condition can be realized by tuning a variable capacitor introduced as the NRM. The validity of the noisy-channel models and NRM is experimentally demonstrated.

[1]  Hitoshi Shimasaki,et al.  Signal measurement system using electrically isolated probe for MHz-band near-field coupling communication , 2013, 2013 IEEE International Instrumentation and Measurement Technology Conference (I2MTC).

[2]  Ai-ichiro Sasaki,et al.  Principles and Demonstration of Intrabody Communication With a Sensitive Electrooptic Sensor , 2009, IEEE Transactions on Instrumentation and Measurement.

[3]  Thomas G. Zimmerman,et al.  : Near-field , 2022 .

[4]  Nozomi Haga,et al.  Proper Derivation of Equivalent-Circuit Expressions of Intra-Body Communication Channels Using Quasi-Static Field , 2012, IEICE Trans. Commun..

[5]  Zeljka Lucev,et al.  A Capacitive Intrabody Communication Channel from 100 kHz to 100 MHz , 2011, IEEE Transactions on Instrumentation and Measurement.

[6]  Osamu Fujiwara,et al.  Numerical calculation of human-body capacitance by surface charge method , 2002 .

[7]  Yuichi Kado,et al.  Noise analysis for near-field intra-body communication systems , 2013, 2013 IEEE International Instrumentation and Measurement Technology Conference (I2MTC).

[8]  T. Kusunoki,et al.  Transmission characteristics between wearable and embedded transceivers based on near-field coupling: Body-channel communication system for human-area networking , 2012, 2012 6th European Conference on Antennas and Propagation (EUCAP).

[9]  H. Morimura,et al.  SNR analysis of a noisy-channel model for a capacitively-coupled personal-area network , 2011, 2011 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications.

[10]  H. Morimura,et al.  Signal-to-Noise Ratio Analysis of a Noisy-Channel Model for a Capacitively Coupled Personal Area Network , 2013, IEEE Transactions on Antennas and Propagation.