ECE8708_2010_ch1-2 (2)

ECE8708_2010_ch1-2 (2) - ECE-8708 2010 Spring ECE-8708 2010...

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ECE-8708 2010 Spring ireless Communications Wireless Communications CE8708 ECE8708 2010 2010 Spring Spring Yimin Zhang, PhD Center for Advanced Communications Villanova University 1 ECE-8708 2010 Spring Introduction 2 ECE-8708 2010 Spring A A Little Little History and Evolution of Mobile Radio History and Evolution of Mobile Radio Invention of Radio axwell: redicted the existence of electromagnetic waves (1864) Maxwell: predicted the existence of electromagnetic waves (1864) Hertz: confirmed Maxwell's work in lab experiment (1887) arconi: ommercializing wireless telephony Marconi: commercializing wireless telephony Found Wireless Telegraph Company (1897) Wireless transmission across the Atlantic (1901) 3 Maxwell (1831–1879) Hertz (1857-1894) Marconi (1874 -1937) ECE-8708 2010 Spring A Little Little History and Evolution of Mobile Radio History and Evolution of Mobile Radio Major boost during World War II Boost of non-military applications after World War II AT&T introduces first mobile telephony system in St. Louis (1946) ell Labs invented the concept of cellular systems 947) Bell Labs invented the concept of cellular systems (1947) 1970’s: Wireless communication era was born evelopment of highly reliable miniature solid state radio frequency Development of highly reliable, miniature solid state radio frequency hardware 1971 AT&T, RCA and Motorola file proposals to use 800 MHz band r cellular stems for cellular systems 1983 FCC grants first commercial cellular licenses 1983 Ameritech launched first commercial cellular system in 4 Chicago
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ECE-8708 2010 Spring A A Little Little History and Evolution of Mobile Radio History and Evolution of Mobile Radio 5 ECE-8708 2010 Spring A Little Little History and Evolution of Mobile Radio History and Evolution of Mobile Radio The early portable units were big and heavy. Modern cell phones are small, fast, and 6 support multimedia communications ECE-8708 2010 Spring Wireless Communications Roadmap 3G (2000s-) 2G (1990s-) Digital techno- logy for higher Provide both packet- switched and circuit- switched domains. upport larger 1G (1980s-) Analog technology. US Advanced spectral and power efficiency. GSM were most widely dopted Digital AMPS Support larger numbers of voice and multimedia data. 0G (1971- ) Autoradiopuhelin In US, Advanced Mobile Phone System (AMPS) was used. NMT and adopted. Digital AMPS and CDMA were also popularly used in US. p (ARP), or Car Radio Phone , pre-cellphone mobile lephony technology TACS were used in other countries. 2.5G & 2.75G Direct extension of 2G with features like packet- it h d ti d 7 telephony technology . switched connection and enhanced data rates. ECE-8708 2010 Spring Mobile Telephony and Wireless Communications Standards (from Wikipedia)
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ECE-8708 2010 Spring Broadband Services Go to Wireless WiMax/LTE provides ireless solutions to last wireless solutions to last mile broadband connection.
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ECE8708_2010_ch1-2 (2) - ECE-8708 2010 Spring ECE-8708 2010...

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