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<p class=MsoNormal>Vabim vas na 14. predavanje iz sklopa "Kolokviji na
IJS" v letu 2009/10, ki bo <strong><span style='font-family:"Calibri","sans-serif";
color:red'>v sredo, 12. maja 2010, ob 13. uri </span></strong><span
style='color:red'>v Veliki predavalnici Instituta »Jožef Stefan«</span>
na Jamovi cesti 39 v Ljubljani. Napovednik predavanja najdete tudi na naslovu <a
href="http://www.ijs.si/ijsw/Koledar_prireditev">http://www.ijs.si/ijsw/Koledar_prireditev</a>,
posnetke preteklih predavanj<span style='color:blue'> </span>pa na <a
href="http://videolectures.net/kolokviji_ijs">http://videolectures.net/kolokviji_ijs</a>.
<o:p></o:p></p>
<p class=MsoNormal style='margin-bottom:12.0pt'>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<b><o:p></o:p></b></p>
<p class=MsoNormal><b>Prof. dr. Erich Leitgeb<o:p></o:p></b></p>
<p class=MsoNormal><i><span style='color:#1F497D'>I</span>nstitute of Broadband
Communications, Graz University of Technology, Gradec, Avstrija<o:p></o:p></i></p>
<p class=MsoNormal><i><br>
</i><b><span style='font-size:14.0pt'>Optične brezžične tehnologije za
širokopasovne komunikacije<o:p></o:p></span></b></p>
<p class=MsoNormal><b><span style='font-size:14.0pt'><o:p> </o:p></span></b></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;margin-bottom:12.0pt;
text-align:justify'>Današnja izmenjava informacij temelji na prenosu podatkov,
govora in slik po telekomunikacijskem omrežju. Optične širokopasovne brezžične
komunikacije so ene najobetavnejših na trgu širokopasovnega dostopa do
multimedijskih storitev. Omogočajo nizke stroške gradnje in delovanja, visoko
stopnjo varnosti, hitro postavitev sistema in široko frekvenčno območje
uporabe, za katero licenca ni potrebna. Po drugi strani so brezžične optične
povezave zelo občutljive za meglo in za vrtinčenje zračnih tokov. Predvidevamo,
da bodo optične brezžične komunikacije oziroma prostorske optične komunikacije,
kot jih tudi imenujemo, igrale pomembno vlogo v prihodnjih informacijskih
superavtocestah.<span style='font-size:12.0pt'><o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;margin-bottom:12.0pt;
text-align:justify'>Raziskovalna skupina Optikom na graški tehniški univerzi
TUG se ukvarja z raziskavami in razvojem optičnih komunikacij s poudarkom na
prostorski optiki (FSO). Sodeluje pri več domačih in mednarodnih projektih,
vključno z Evropsko mrežo odličnosti SatNEx, s projekti ESA in projektom COST
IC 0802, ki se nanaša na modeliranje kanala v FSO-sistemih. Skupina sedaj
raziskuje možnosti, kako povečati zanesljivost FSO-sistemov z novim hibridnim
FSO-RF-sistemom, ki upošteva različne vremenske in atmosferske razmere, nove
modulacijske in kodirne postopke in raznovrstne načine raznolikega sprejema.
Predavanje bo v angleškem jeziku.<o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;margin-bottom:12.0pt'><strong><span
style='font-family:"Calibri","sans-serif";color:red'>Lepo vabljeni!<o:p></o:p></span></strong></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;margin-bottom:12.0pt'><strong><span
style='font-family:"Calibri","sans-serif";font-weight:normal'><o:p> </o:p></span></strong></p>
<p class=MsoNormal align=center style='text-align:center'><b><span
style='font-size:20.0pt'>***<o:p></o:p></span></b></p>
<p class=MsoNormal style='text-align:justify'><o:p> </o:p></p>
<p class=MsoNormal style='text-align:justify'><span lang=EN-US>We would like to
invite you to 14<sup>th</sup> lecture of the "Kolokvij na IJS" in the
school year 2009/10. The lecture will be held <b>on Wednesday, May 12, 2010 at
1 pm</b> at <b>JSI main lecture hall</b>, Jamova 39, Ljubljana. The abstract of
the lecture can be found on website: </span><span lang=EN-US style='font-size:
10.0pt'><a href="http://www.ijs.si/ijsw/Koledar_prireditev"><span
style='font-size:11.0pt'>http://www.ijs.si/ijsw/Koledar_prireditev</span></a></span><span
lang=EN-US>, the previous recorded lectures can be found on website: </span><span
lang=EN-US style='font-size:10.0pt'><a
href="http://videolectures.net/kolokviji_ijs"><span style='font-size:11.0pt'>http://videolectures.net/kolokviji_ijs</span></a></span><span
lang=EN-US>.</span><span lang=EN-US style='font-size:10.0pt'> </span><span
lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;margin-bottom:12.0pt'><span
lang=EN-US>********************************************<o:p></o:p></span></p>
<p class=MsoNormal><b>Prof. dr. Erich Leitgeb<o:p></o:p></b></p>
<p class=MsoNormal><i><span style='color:#1F497D'>I</span>nstitute of Broadband
Communications, Graz University of Technology, Graz, Austria<o:p></o:p></i></p>
<p class=MsoNormal style='margin-bottom:12.0pt'><i><o:p> </o:p></i></p>
<p class=MsoNormal style='text-align:justify'><b><span style='font-size:16.0pt'>Optical
Wireless Technologies for Broadband Communications<o:p></o:p></span></b></p>
<p class=MsoNormal style='text-align:justify'><span lang=EN-US
style='font-size:12.0pt'><o:p> </o:p></span></p>
<p class=MsoNormal style='text-align:justify'><span lang=EN-US>Today's
information exchange depends on the transmission of data, voice and multimedia
across the telecommunication networks. Optical wireless broadband communication
represents one of the most promising approaches for addressing the emerging
broadband access market. It offers low start-up and operational costs, high
security, rapid deployment, high fibre-like bandwidths where no licence is
needed. On the other side optical wireless links can be severely affected by
fog and atmospheric turbulence. However, the optical wireless communications,
also refered to as free space optical communications, will play a significant
role in future information superhighways.<o:p></o:p></span></p>
<p class=MsoNormal style='text-align:justify'><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal style='text-align:justify'><span lang=EN-US>The research
group Optikom at TU Graz deals with the research and development of optical
communications with special emphasis on Free Space Optics (FSO). It
participates in several national and international projects, including EU
Network of Excellence SatNEx, several ESA projects, and COST IC0802 action
related to channel modelling for FSO systems. The group is currently
investigating how to increase the reliability of FSO systems by new hybrid RF-FSO
system design, considering different weather and atmospheric conditions, new
modulation and coding schemes and different diversity techniques.<o:p></o:p></span></p>
<p class=MsoNormal><b><span lang=EN-US style='font-size:14.0pt'><o:p> </o:p></span></b></p>
<p class=MsoNormal><b><span lang=EN-US style='font-size:14.0pt'>We look forward
to meeting you at the “Kolokvij na IJS”!<o:p></o:p></span></b></p>
<p class=MsoNormal><span lang=EN-US style='font-size:12.0pt'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal align=center style='text-align:center'><b><span
style='font-size:20.0pt'><o:p> </o:p></span></b></p>
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