Titre: Fundamental Principles of Radio Communication Systems: the Road to Implantable Telemetry
Conférencier: Robert Sobot , University of western Ontario, London, Ontario, Canada
Lieu: NEWCAS2014, Delta Trois-Rivières ,
Date et heure:
dimanche le 22 juin 2014 de 08:30 à 12:00

Résumé: Wireless transmission of information over vast distances is one of the finest examples of Clarke’s third law stating that “any sufficiently advanced technology is indistinguishable from magic”. Even though a radio represents one of the most ingenious achievements of humankind, and is now taken for granted, for the majority of the modern human population (including some of its highly educated members) this phenomenon still appears to be magical. In the first part of this tutorial I present fundamental concepts in physics, mathematics, and engineering that are needed to help us understand and model AM and FM wireless transmission of electromagnetic signals between transmitter and the receiver. The theoretical principles are explained by using an example of a classical heterodyne AM radio receiver topology, which is applicable to both analogue and software defined radio architectures. For the purpose of demonstrating direct implementations of the fundamental principles, in the second part of this tutorial I present basic analogue circuit topologies of radio receiver’s fundamental building blocks: RF amplifier, mixer, oscillator, and the RF signal decoder. The understanding of their individual roles, mathematical functions, and relative interaction within the system is important for successful synthesis of radio systems, for resolving practical issues of the radio receiver design, and for achieving the most important system level specifications. Finally, in the third part of the tutorial, I delve into important aspects of technological revolution that enabled us to design ultra small wireless devices and sensors that are used to safely interact with the living tissue, monitor vital signs, and transmit the collected data from and within the body. Specifically, I discuss some of the most important issues related to miniaturization of electronic circuits when the electronics is intended to coexist and interact with the living organisms; hostile environmental conditions inside living beings, harsh power consumption and physical system size constrains, including moral and legal issues have created multidisciplinary environment that is drastically different relative to what the “traditional’’ electrical engineers are used to. This tutorial aims to summarize and introduce the basics of radio communication principles and systems, and to introduce engineering aspects of the implantable telemetry that is expected to be one of the cornerstones of our future eHealth infrastructure. Thus, in this talk I hope to at least reduce, if not completely remove, the “magic” part out of the wireless implantable telemetry subject, nevertheless at the same time I hope to bring this fascinating subject closer to the future generations of scientists and engineers.

Note biographique: Robert Sobot received the B.Sc. degree in engineering physics (a five years program) from the University of Belgrade, former Yugoslavia, in 1989, and the M.A.Sc. and the Ph.D. degrees in electrical engineering from Simon Fraser University, Canada, in 1996 and 2005 respectively. In 2006 he joined the Department of Electrical and Computer Engineering at Western University where he is now an Associate Professor. From 1996 to 2001 he was with PMC-Sierra Inc., Canada, first as an Analog Circuit Designer, then as a Team Leader. Prior to 1994 he worked for number of companies in Europe and North America on various research projects including MEMS pressure sensors, silicon IR detectors and radio-controlled systems. During 2012/13 he is visiting researcher at Université Pierre et Marie Curie at Sorbonne (LiP6), Paris, France. Since 2012 Prof. Sobot authored two textbooks on the topic of “Wireless Communication Electronics”, and he established the Implantable System Laboratory (ISL) at Western University in Canada that is dedicated to research related to wireless implantable telemetry systems. He is a Member of IEEE, Circuits and Systems Society, and Solid-State Circuits Society. His current research interests include implantable telemetry systems, biomedical IC applications, RF ICs for wireless communications, brain to machine interface, Sigma-Delta modulation and analog adaptive equalization.

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