Brief history of wireless communication

2. Group Members
• Abdul Rehman 12-EE-47
• Ahsan Irshad 11-EE-160
• Irfan Farooq 12-EE-40
• Muhammad Saaleh 12-EE-09
• Muhammad Tehzeeb 12-EE-22
• Muhammad Talha 12-EE-23

3. Definition of Communication
• Exchange of information between two or
more than two people in an understandable
form is called communication.
• The person who sends the message is called
Sender.
• The person who receives the information is
called Receiver.

4. History of Communications
• Phoenicians alphabet.
• Sumerians develop cuneiform writing -
pictographs of on clay tablets.
• The Egyptians hieroglyphic writing
3500 BC
to
2900 BC

5. History of Communications
• Greeks use a phonetic
alphabet written from
left to right.
• Oldest record of writing in
China on bones.
1775 BC
1400 BC

6. History of Communications
• First postal service –
for government use in
China.
• First recorded use of homing pigeons to
send messages - Announcing the winner
of the Olympic Games to the Athenians.
900 BC
776 BC

7. History of Communications
• Papyrus rolls and early parchments
made of dried reeds –
first portable and light writing
surfaces.
• Tsai Lun of China invents paper
as we know it.
500 BC
to
170 BC
105 BC

8. History of Communications
• Human messengers on
foot or horseback in
Egypt and China
with messenger.
• Fire and smoke
messages.
200
to
100 BC

9. History of Communications
• Romans establish
postal services.
• Heliographs - mirrors first
used to send messages
by Roman Emperor
Tiberius.
14 AD
37 AD

10. History of Communications
• Christiaan Huygens (Dutch scientist and
mathematician) work on the phenomena
of light reflection and refraction.
• Main contribution: Invention of
Pendulum, and
Telescopic studies
1678

11. History of Communications
• Claude Chappe (Freanch Inventor)
first long-distance semaphore telegraph
line using pendulums (Sound Clock).
. Different positions, different signals.
• Charles Wheatstone reproduces sound by
vibration (Musical Instruments-Piano)
Main Contribution: Wheatstone Bridge
1793
1821

12. History of Communications
• Joseph Henry (American) invents
the first electric telegraph.
Electromagnet move- Selfinductance
• Micheal Faraday (English Physicist)
publish his result on electromagnetism
• Samuel Morse invents Morse code.
First long distance electric telegraph
line. (Light, Voltage)
1831
1831
1835
to
1843

13. History of Communications
• Alexander Graham Bell (Scottish
Scientist, Engineer) invents
the electric telephone.
Diaphram, which converts sound to
electric pulses.
1876

14. History of Communications
• James Clerk Maxwell (1831-79): theory of
electromagnetic Fields, wave equations.
• Heinrich Rudolf Hertz (1857-94):
Conclusively proved the existence of
electromagnetic waves theorized by J
Maxwell.
• Nikola Tesla Increased the distance of
electromagnetic transmission.
1864
1886

15. History of Communications
• Thomas Edison patents the
mimeograph - an office copying
machine.
• Alexander Graham Bell patents
the electric telephone.
• Thomas Edison patents the
phonograph.
1876
1877

16. History of Communications
• Emile Berliner invents the gramophone
- a system of recording which could be
used over and over again.
1887

17. History of Communications
• Guglielmo Marconi improves wireless
telegraphy.
• First telephone answering machines appear.
1894

18. History of Communications
• Guglielmo Marconi- demonstrates
wireless telegraphy using long wave
transmission with high transmission power
(> 200kw)
1895

19. History of Communications
• Valdemar Poulsen invents the first
magnetic recording device using
magnetized steel tape.
• Loudspeakers invented.
1899

20. History of Communications
• Amplitude Modulation was first
experimented by Reginald Fessen Ben
and Roberto Landel
1900
History of Communications
• Marconi transmits radio signals from Cornwall to
Newfoundland - the first radio signal to cross the
Atlantic Ocean.
1901

21. History of Communications
• First Radio Broadcast by Reginald A. Fessenden
• Invention of Amplifying Vacuum Tubes(triode)
by Lee De Forest and Robert Von Lieben
• Commercial transatlantic connections through
huge base stations (30 hundred meter high
antennas)
• First cross country call was made.
1906
1907
1914

22. History of Communications
• Wireless voice transmission New York - San
Francisco.
• First radios with tuners begin to broadcast
different stations
1915
1916

23. History of Communications
• Discovery of short waves by Marconi which can
reflect from ionosphere and can be transmit
around the world.
• Train-phone was available on the Hamburg –
Berlin line. Wires parallel to the railroad track
worked as antenna.
• TV broadcast trials (across Atlantic, color TV, TV
news) John L Baird
• Frequency modulation (E. H. Armstrong)
1920
1926
1928
1933