Basic history, process, Types(Satellite communication,Mobile communication,Bluetooth and Wi-Fi) are discussed in this presentation.

1. DEBJIT CHAKRABORTY
Roll No. : 14
3rd Year
Department of Electronics & Tele-communication Engineering
RAMAKRISHNA MISSION SHILPAMANDIRA

2. WHY WIRELESS COMMUNICATION
 Freedom from Wires
 Flexibility to connect multiple devices.
 Faster transmission
 Low Cost
 Globally Connected

3. HISTORY OF WIRELESS COMMUNICATION
 The first wireless telephone conversation
occurred in 1880, when Alexander Graham
Bell and Charles Sumner Tainter invented
the Photophone, a telephone that sent audio
over a beam of light.
 In 1894, Guglielmo Marconi developed a
wireless telegraph system using radio waves.

4. WHAT IS WIRELESS COMMUNICATION
 Wireless communication is the transfer of
information between two or more points.
 It does not need any physical medium.

5. PROCESS OF WIRELESS COMMUNICATION
TRANSMITTER RECEIVER

6. Information
Channel
Encoding
Multiplexing
Source
Encoding
Modulation
Encryption
De-Multiplexing
De-Modulation
Source
Decoding
Channel
Decoding
Decryption
Received Signal
BLOCK DIAGRAM OF WIRELESS COMMUNICATION

7. TYPES OF WIRELESS COMMUNICATION
Satellite
Communication
Mobile
Communication
Wi-Fi
Bluetooth Infrared
Communication
Microwave
Communication

8. SATELLITE COMMUNICATION
The use of artificial satellites to
provide communication links
between various points on Earth.
Satellite communications play a
vital role in the global
telecommunications system.
Use very high-frequency range
of 1–50 GHz.
It is usually placed in about
22,300 miles above the earth.

9. WORKING OF SATELLITE COMMUNICATION

10. MOBILE COMMUNICATION
 A wireless form of
technology where voice
or information is
transmitted and received
via EM waves.
 A mobile phone is an
example of mobile
communication.
 Runs on the 900 MHz and
1800 MHz frequency
bands.

11. Speed: 2.4kbps
Range:
824-894MHz
Technology:
AMPS(Advance
d Mobile Phone
System)
Speed: 64 kbps
Range: 900-
1800MHz
Technology:
GSM,GPRS,EDGE
(Enhanced Data Rates
for GSM)
Speed: 2 Mbps
Range: 2100MHz
Technology:
UMTS/HSPA(High-
Speed Packet Access)
Speed: 1 Gbps
Range:
850-1800MHz
Technology:
LTE( Long Term
Evolution)
Speed: 10 Gbps
Technology:
Under research
Ultra Low Latency

12. BLUETOOTH COMMUNICATION
 Bluetooth is a wireless communication
technology that can be used for close-
range data transmission from one digital
device to another.
It communicates on a frequency of 2.4GHZ.
It can connect up to eight device
simultaneously.
Range is approximately 10 meters.

13. WI-FI COMMUNICATION
 Wi-Fi is a universal wireless networking technology that utilizes
radio frequencies to transfer data. Wi-Fi allows high-speed
Internet connections without the use of cables.
Wi-Fi uses radio waves to transmit data.
Wi-Fi works using Physical Data Link Layer.
Frequency range is 2.4GHz and 5 GHz.

14. Applications

15. Advantages Of Wireless Communication
Freedom From Wires.
Better global coverage.
 Easy to carry and reinstall at another place.
 It is less secure.
 Minimal range problem.
 More open to interference.
Limitations Of Wireless Communication

16. CONCLUSION
 Wireless communications have
enabled the connection of billions of
people to the Internet so that they are
benefited of today’s digital economy.
 Nearly every sector of the economy
now relies upon wireless technologies.
 Need to be more secure and
advanced.