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                           <rdf:li><rdf:Description xmpDM:name="Early history of wireless communication Many people in history used light for communication heliographs, flags (“semaphore”), ..." xmpDM:startTime="0" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="150 BC smoke signals for communication; (Polybius, Greece) 1794, optical telegraph, Claude Chappe Here electromagnetic waves are of special importance:" xmpDM:startTime="0" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="1831 Faraday demonstrates electromagnetic induction J." xmpDM:startTime="0" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Maxwell (1831-79): theory of electromagnetic fields, wave equations (1864) H." xmpDM:startTime="0" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Hertz (1857-94): demonstrates with an experiment the wave character of electrical transmission through space (1886, in Karlsruhe, Germany) Prof." 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xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="- San Francisco 1920 Discovery of short waves by Marconi reflection at the ionosphere smaller sender and receiver, possible due" xmpDM:startTime="85567" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="to the invention of the vacuum tube (1906, Lee DeForest and Robert von Lieben) 1926 Train-phone on the line Hamburg" xmpDM:startTime="85567" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="- Berlin wires parallel to the railroad track Prof." xmpDM:startTime="85567" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Dr.-Ing." xmpDM:startTime="85567" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Jochen H." xmpDM:startTime="85567" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Schiller www.jochenschiller.de" xmpDM:startTime="85567" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Mobile Communications" xmpDM:startTime="85567" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="History of wireless communication II 1928 many TV broadcast trials (across Atlantic, color TV, news) 1933 Frequency modulation (E." xmpDM:startTime="162567" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="H." xmpDM:startTime="162567" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Armstrong) 1958 A-Netz in Germany analog, 160MHz, connection setup only from the mobile station, no handover, 80% coverage, 1971 11000" xmpDM:startTime="162567" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="customers 1972 B-Netz in Germany analog, 160MHz, connection setup from the fixed network too (but location of the mobile station" xmpDM:startTime="162567" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="has to be known) available also in A, NL and LUX, 1979 13000 customers in D 1979 NMT at 450MHz" 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wireless communication III 1986 C-Netz in Germany analog voice transmission, 450MHz, hand-over possible, digital signaling, automatic location of" xmpDM:startTime="243333" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="mobile device was in use until 2000, services: FAX, modem, X.25," xmpDM:startTime="243333" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="e-mail, 98% coverage 1991 Specification of DECT Digital European Cordless Telephone (today: Digital Enhanced Cordless Telecommunications) 1880-1900MHz, ~100-500m range, 120" xmpDM:startTime="243333" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="duplex channels, 1.2Mbit/s" xmpDM:startTime="243333" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="data transmission, voice encryption, authentication, up to several 10000 user/km2, used in more than 50 countries 1992 Start of GSM" xmpDM:startTime="243333" 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Communications" xmpDM:startTime="243333" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="History of wireless communication IV 1994 E-Netz in Germany GSM with 1800MHz, smaller cells as Eplus in D (1997 98%" xmpDM:startTime="331700" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="coverage of the population) 1996 HiperLAN (High Performance Radio Local Area Network) ETSI, standardization of type 1: 5.15" xmpDM:startTime="331700" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="- 5.30GHz," xmpDM:startTime="331700" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="23.5Mbit/s" xmpDM:startTime="331700" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="recommendations for type 2 and 3 (both 5GHz) and 4 (17GHz) as wireless ATM-networks (up to 155Mbit/s) 1997 Wireless LAN" xmpDM:startTime="331700" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="- IEEE802.11" xmpDM:startTime="331700" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="IEEE standard, 2.4" xmpDM:startTime="331700" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="- 2.5GHz" xmpDM:startTime="331700" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="and infrared, 2Mbit/s already many (proprietary) products available in the beginning 1998 Specification of GSM successors for UMTS (Universal Mobile" xmpDM:startTime="331700" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Telecommunications System) as European proposals for IMT-2000 Iridium 66 satellites (+6 spare), 1.6GHz" xmpDM:startTime="331700" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="to the mobile phone Prof." xmpDM:startTime="331700" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Dr.-Ing." xmpDM:startTime="331700" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Jochen H." 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