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Wireless Communication: Past, Present, and Future

Wireless Communication: Past, Present, and Future. Ericko Yulianto Engineering 302 May 7, 2002. Before the “Birth of Radio”. James Clerk Maxwell A brilliant mathematician Maxwell’s Differential Equation Theories of relativity Heinrich Rudolf Hertz A professor of physics

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Wireless Communication: Past, Present, and Future

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  1. Wireless Communication:Past, Present, and Future Ericko Yulianto Engineering 302 May 7, 2002

  2. Before the “Birth of Radio” • James Clerk Maxwell • A brilliant mathematician • Maxwell’s Differential Equation • Theories of relativity • Heinrich Rudolf Hertz • A professor of physics • Experiments dealing with electric waves • First to broadcast and receive radio waves

  3. Continued • Edouard Branly • Coherer wireless detector • Oliver Joseph Lodge • Designed a standard detector in early wireless telegraph receivers • Alexander Popov • Radio inventor (?)

  4. The “Birth of Radio” • Guglielmo Marconi • Educated in England and Italy • Hertz’s death fired Marconi with idea • Experimented in transmitting detectable Morse signal over a certain range. • Granted a British patent in March 1897 • The Wireless Telegraph and Signal Company

  5. Transoceanic Communication • To break the isolation of the sea • First person to bridge the Atlantic by wireless • Used in commercial and defense ships • Titanic incident – saved some 1,500 people • Involved heavily in World War I

  6. The Growth of Radio Station • First broadcaster: KDKA in Pittsburgh (November 2, 1920) • In less than 6 months, over 250 new station licenses are granted. • The U.S government restricts broadcasting to specific wavelength. • Advertising on radio: American Telephone and Telegraph Company

  7. Continued • Edward Howard Armstrong: Frequency Modulation (FM) in 1935 • First used for public safety used. • Involved in World War II • Motorola’s Handie-Talkie and Walkie-Talkie • Post-war rival: television

  8. Telephone-Radio Era • Lars Magnus Ericsson • Partnered with Carl Andersson  L.M Ericsson and Co. • 1881: First Ericsson telephones were used • 1910: Car-telephone • Early 1920s: Mobile radio telephone systems for police car dispatch.

  9. Continued • 1928: Galvin Manufacturing Co.  Motorola • 1934: Federal Communications Commission • 1946: AT&T and Southwestern Bell introduced the first American commercial mobile radio-telephone • Six channels in 150 Mhz

  10. Continued • Cellular phone • D.H Ring and W.R. Young from Bell Laboratories (1947) • A network of small geographical areas (called cells) • Japanese rival: Motorola • 1971 Intel introduced the first microprocessor

  11. Continued • Europe: Groupe Speciale Mobile (GSM) • Began in 1982 by a group of 26 European national phone companies • In many respects was better designed • North American counterpart: PCS 1900

  12. Future • Digital technology • IF Processing • High Speed DSP Processors • Reconfigurable Architecture • Microcell • One to two orders of magnitude smaller than the current cellular system • Cost will significantly decrease • Easy and flexible implementation

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