102L1intro - A Technical Introduction A Technical...

Info iconThis preview shows pages 1–7. Sign up to view the full content.

View Full Document Right Arrow Icon
1 - 1 October, 1997 Technical Introduction to Wireless -- 102 v1.0 - (c) 1997 Scott Baxter A Technical Introduction to Wireless A Technical Introduction to Wireless
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
1 - 2 October, 1997 Technical Introduction to Wireless -- 102 v1.0 - (c) 1997 Scott Baxter Wireless Systems: History of Radio and Wireless Telephony Wireless Systems: History of Radio and Wireless Telephony A Technical Introduction to Wireless Chapter 1 MTS, IMTS
Background image of page 2
1 - 3 October, 1997 Technical Introduction to Wireless -- 102 v1.0 - (c) 1997 Scott Baxter How Did We Get Here? Days before radio. .... 1680 Newton first suggested concept of spectrum, but for visible light only 1831 Faraday demonstrated that light, electricity, and magnetism are related 1864 Maxwell’s Equations: spectrum includes more than light 1890’s First successful demos of radio transmission U NS LF HF VHF UHF MW IR UV X RAY
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
1 - 4 October, 1997 Technical Introduction to Wireless -- 102 v1.0 - (c) 1997 Scott Baxter Telegraphy n Samuel F.B. Morse had the idea of the telegraph on a sea cruise in the 1833. He studied physics for two years, and In 1835 demonstrated a working prototype, which he patented in 1837. n Derivatives of Morse’ binary code are still in use today n The US Congress funded a demonstration line from Washington to Baltimore, completed in 1844. n 1844: the first commercial telegraph circuits were coming into use. The railroads soon were using them for train dispatching, and the Western Union company resold idle time on railroad circuits for public telegrams, nationwide n 1857: first trans-Atlantic submarine cable was installed Samuel F. B. Morse at the peak of his career Field Telegraphy during the US Civil War, 1860’s Submarine Cable Installation news sketch from the 1850’s
Background image of page 4
1 - 5 October, 1997 Technical Introduction to Wireless -- 102 v1.0 - (c) 1997 Scott Baxter Telephony n By the 1870’s, the telegraph was in use all over the world and largely taken for granted by the public, government, and business. n In 1876, Alexander Graham Bell patented his telephone, a device for carrying actual voices over wires. n Initial telephone demonstrations sparked intense public interest and by the late 1890’s, telephone service was available in most towns and cities across the USA Telephone Line Installation Crew 1880’s Alexander Graham Bell and his phone from 1876 demonstration
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
1 - 6 October, 1997 Technical Introduction to Wireless -- 102 v1.0 - (c) 1997 Scott Baxter Radio Milestones n 1888: Heinrich Hertz, German physicist, gives lab demo of
Background image of page 6
Image of page 7
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 08/08/2011 for the course CS 310 taught by Professor Aartisingh during the Spring '11 term at National Institute of Technology, Calicut.

Page1 / 15

102L1intro - A Technical Introduction A Technical...

This preview shows document pages 1 - 7. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online