TITLE:	Radio Systems Techniques for Enhancing Energy Efficiency, Reducing Interference and Parasitic Radiation

ABSTRACT:
Wireless Radio usage for communication is one of the main promoters of economic and social growth and its importance is predominant for defense and security issues. Therefore, significant resources are invested in improving radio communication systems, especially mobile Radio systems users, handsets and equipment. For cellular communication only, the number of handsets exceeds the 1000 millions and soon will outnumber wired phones.

However, the energy efficiency of the systems base stations is still very low. Most of the transmitted energy and radiated power density are wasted as interference and only a very small part is useful and eventually reaches the desired receivers. The energy efficiency of the mobile handsets is worse, and up to 65% of the transmitted energy can be wasted in the user’s head and body, as a radiation hazard instead of reaching the adequate base stations.

This seminar analyzes and computes base station radiation effects under far field propagation conditions and collocated handset radiation under complex near field conditions. Main mitigation techniques using other power control; signal processing methods, smart antennas and possible meta-material techniques will be described. This will be followed by proper shielding diversity, filtering, parasitic power cancellation and other mitigation techniques useful for reduction of non desired-parasitic radiation intensities and energy.

This seminar’s main purpose is to bring to light the possibilities for increasing energy efficiency and quality of base stations and handsets specifically by decreasing the required transmitted radiation power, equipment’s power consumption, batteries load and the radiated power and energy absorbed by human beings.