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Communications expert looks to a more efficient mobile future

  • 08 June, 2006 16:34

<p>Israeli telecommunications expert Jacob Gavan will discuss methods to improve the efficiency of wireless communications, including reducing the amount of radiation that mobile phones emit, in the first of two lectures he is delivering next week at the University of Technology, Sydney.</p>
<p>A consultant on radio interference and radiation effects to several large Israeli and international companies, Professor Gavan is speaking at the invitation of the NSW section of the Institute of Electrical and Electronics Engineers (IEEE).</p>
<p>Next Wednesday, 15 June, he will discuss techniques being developed to enhance energy efficiency and reduce interference and "parasitic radiation" in radio systems.</p>
<p>Professor Gavan said that despite wireless communications being one of the main promoters of economic and social growth, the energy efficiency of such systems was still very low.</p>
<p>"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," he said. "The energy efficiency of the mobile handsets is worse, and up to 65 per cent 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."</p>
<p>Professor Gavan will discuss various mitigation techniques including power control, signal processing, smart antennas, shielding and filtering.</p>
<p>On Thursday 16 June he will turn his attention to global communications systems, asking whether "stratospheric quasi-stationary platforms" might be the future for local and regional communication systems.</p>
<p>He will discuss the possibility that platforms positioned about 21 kilometres above the ground could be an economically viable replacement for low Earth orbiting satellites to service communication systems operating at distances of up to 1000 kilometres.</p>
<p>Professor Gavan, from the Holon Academic Institute of Technology, has published over 150 papers on theoretical and applied radio and satellite communications, electromagnetics, and radar systems, especially on radio mutual interference and radiation effects.</p>
<p>The lectures on both days (15 and 16 June) are being held from 2pm to 4pm in Room 246, Building 6 (Peter Johnson Building), 702 Harris St (next to the ABC complex), UTS City campus, Ultimo.</p>
<p>Further Information:
Associate Professor Sam Reisenfeld,
UTS Faculty of Engineering,
Ph 9514 2448 or 0413 441 119,</p>
Terry Clinton
Media Officer, Media Branch
Marketing and Communication Unit
University of Technology, Sydney
PO Box 123 Broadway
NSW 2007 Australia
Tel +61 2 9514 1623 Fax +61 2 9514 1616
Mob 0419 293 261
UTS Experts: online at
U: magazine online at</p>

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