MIT16_36s09_lec01

MIT16_36s09_lec01 - MIT OpenCourseWare http:/ocw.mit.edu...

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MIT OpenCourseWare http://ocw.mit.edu 16.36 Communication Systems Engineering Spring 2009 For information about citing these materials or our Terms of Use, visit: http://ocw.mit.edu/terms .
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16.36: Communication Systems Engineering Lecture 1: Introduction February 3, 2009 Eytan Modiano Eytan Modiano Slide 1
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Timeline of modern communication Analog Comm Systems Digital Comm Systems Networked Comm Systems (data packets) 1876 - Bell Telephone 1920 - Radio Broadcast 1936 - TV Broadcast 1960 s - Digital communications 1965 - First commercial satellite 1970 - First Internet node 1980 - Development of TCP/IP 1993 - Invention of Web ~ 2000 - Internet traffic surpasses voice! Eytan Modiano Slide 3
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Typical Communication Classes Old days (1980s): Teach analog and digital communications in separate classes Networking was sometimes taught as a graduate class, but most people did not see much use to it! Today: Most communication classes focus mainly on digital Some classes may teach some analog for “historical” reasons Networking classes are offered at both undergraduate and graduate levels This class will introduce concepts of communications and networking at the undergraduate level First attempt at combining concepts from both Importance of not thinking of the two systems as separate systems Other offerings (advanced) 16.37/6.263: Data Networks 6.450: Digital Communications Eytan Modiano Slide 4
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Why communications in AA? AA Information Initiative ~ 1997 Communications Software and computers Autonomous systems Computers are a vital part of an Aerospace system Control of system, Human interface Involves computers, software, communications, etc. E.g., complex communication networks within spacecraft or aircraft Space communications is a critical industry Satellite TV, Internet Access, NASA, DoD Information technology is a critical engineering discipline These skills are as fundamental today as the knowledge of basic math or physics Eytan Modiano Slide 5
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Communication Applications Broadcast TV/Radio Recent move toward digital broadcast (Satellite TV/Radio) 2009: all TV broadcast is going digital (HDTV) - why? Digital telephony Wired and wireless Computer communications/networks Resource sharing Computing: mainframe computer (old days) Printers, peripherals Information, DB access and update Internet Services Email, FTP, Telnet, Web access Today, the vast majority of network traffic is for internet applications Internet is also starting to carry traditional applications Radio, TV, phone Eytan Modiano Slide 8
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Types of Networks Wide Area Networks (WANS) Span large areas (countries, continents, world)
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MIT16_36s09_lec01 - MIT OpenCourseWare http:/ocw.mit.edu...

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