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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 Wireless Communications 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 Maxwell: predicted the existence of electromagnetic waves (1864) Hertz: confirmed Maxwell's work in lab experiment (1887) Marconi: commercializing 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 A Little Little History and Evolution of Mobile Radio History and Evolution of Mobile Radio Major boost during World War II B t f ilit li ti ft W ld W II Boost of non-military applications after World War II AT&T introduces first mobile telephony system in St. Louis (1946) Bell Labs invented the concept of cellular systems (1947) 1970’s: Wireless communication era was born Development 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 for cellular systems 1983 FCC grants first commercial cellular licenses 1983 Ameritech launched first commercial cellular system in 4 Chicago
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