Important Events in Communication Theory and Practice Theory

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Important Events in Communication Theory and Practice Theory Technology Early 1800 s: Mathematical treatises

Important Events in Communication Theory and Practice Theory Technology Early 1800 s: Mathematical treatises by Fourier, Cauchy, Laplace, Ohm’s law Early experiments on electricity and magnetism (Oersted, Ampere, Faraday) 1845: Kirchhoff’s laws 1838: Samuel Morse demonstrates telegraphy 1864: Maxwell’s equations 1860 s: Transatlantic cable installed 1890 s: Heaviside’s publications 1876: A. G. Bell patents telephone 1920 s: Signaling theory (Carson, Nyquist, Hartley) 1934: Negative feedback amplifier (Black) Mid 1940 s: Statistical communication theory (Wiener, Kolmogorov, Rice) 1948: Shannon’s paper on information theory 1948— 1950: Hamming and Golay codes discovered 1897: Wireless telegraphy (Marconi) Early 1900 s: Vacuum tubes, AM experiments, superheterodyne receiver 1938: TV broadcasting 1948: Transistor 1950 s: Time-division multiplexing, color TV, first transoceanic cable, first voiceband MODEM

Important Events in Communication Theory and Practice Theory Technology 1960 s: Theory of high-speed

Important Events in Communication Theory and Practice Theory Technology 1960 s: Theory of high-speed digital communications (equalization, coding) Integrated circuits, satellites, lasers, digital signal processing, electronic switching for telephony 1970 s: Stochastic modeling of data and computer networks, Lempel-Ziv data compression algorithm ARPANET (1969), Mobile cellular 1980 s: Trellis coding, multi-carrier signaling CD players, high-speed MODEMs, HDTV 1990 s: Turbo codes, Code-Division Multiple Access (CDMA) Internet, Personal Communications Services (PCS), digital cellular 2000 s: Low-Density Parity Check codes (rediscovered), space-time codes, Multi-Input/Multi-Output techniques, Cooperative communications Ad hoc networks, sensor networks, home networks (“smart” spaces), MP 3 players, GPS….