Wireless Communication: Past, Present, and Future Ericko Yulianto

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
• Experiments dealing with electric waves
• First to broadcast and receive radio waves

Continued

• Edouard Branly

• Coherer wireless detector

• Oliver Joseph Lodge

• Designed a standard detector in early wireless telegraph receivers

• Alexander Popov

• Radio inventor (?)

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

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

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

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

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.

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

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

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

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