Comparison Between Wired and Wireless communication

1. Presented by:-
Chanchal
Class/sem :- (B.Tech/EEE/7th)
Roll No. 1282728

3. -Optical fiber which are long, thin, made with pure
glass about the diameter of human hair and it is a
dielectric waveguide or medium in which information
(voice, data or video) is transmitted through a glass or
plastic fiber, in a form of light.
-Optical fiber communication system consists of three
basic elements:-
1) the optical transmitter
2) optical fiber cable
3) the optical receiver

5. Jacques Babinet>
< John Tyndall included a demonstration
of it in his public lectures in London, 12
years later. Tyndall also wrote about the
property of total internal reflection in
an introductory book about the nature
of light in 1870.
< Daniel Colladon

7. Basicstructureofopticalfiber

8. 1) Multimode fiber :-If the
diameter of the core of the fiber
is large enough so that there are
many paths that light can take
through the fiber, the fiber is
called "multimode" fiber.
2) Single mode fiber :-Single-
mode fiber has a much smaller
core that only allows light rays
to travel along one mode inside
the fiber, the fiber is called
‘’single mode’’ fiber.

9. Advantages
1) Enormous bandwidth
2) Low transmission loss
3) Immunity to cross talk
4) Electrical isolation
5) Signal security
6) Flexibility
7) Reliability
8) Ease of installation
1) High cost and most
expensive
2) Fragility
3) Affected by chemicals
4) Opaqueness (exposed to
radiation)
5) Scattering
6) Absorption
Disadvantages

10. 1) Tele-Communication
2) Medical system
3) Interconnect
4) Networking
5) Gigabit Ethernet
6) Harsh environment
7) Military
8) Aerospace & avionics
9) Data transfer tests
10) Data storage equipments
11) Simulation
12) Semiconductor equipments

11. Secondly we discuss about….

12.  Transmitting/receiving voice and data using
electromagnetic waves in open space.
 The information from sender to receiver is carried over
a well defined frequency band(channel).
 Each channel has a fixed frequency bandwidth &
capacity(bit rate).
 Different channels can be used to transmit
information in parallel and independently.

13. Transmitting signal
Received signal
satellite
Transmitting
antenna
Receiving
antenna

14.  FM RADIO 88 MHZ
 TV BROADCAST 200 MHZ
 GSM PHONES 900 MHZ
 GPS 1.2 GHZ
 PCS PHONES 1.8 GHZ
 BLUETOOTH 2.4 GHZ
 Wi-Fi 2.4 GHZ

15.  Freedom from wires.
 No bunch of wires running from here and there.
 “Auto Magical” instantaneous communication without
physical connection setup e.g.- Bluetooth, Wi-Fi.
 Global coverage
 Communication can reach where wiring is infeasible
or costly
 e.g.- rural areas,buildings,battlefield,outerspace.
 Stay connected,flexiblity to connect multiple devices.

16. RADIO TRANSMISSION:- easily generated, Omni-
directional , travel long distance , easily penetrates
buildings.
 PROBLEMS:- frequency dependent , relatively low
bandwidth for data communication , tightly licensed by
government.
MICROWAVE TRANSMISSION:- widely used for long
distance communication , give high S/N ratio , relatively
inexpensive.
 PROBLEMS:- don’t pass through buildings , whether and
frequency dependent.

17. INFRARED AND MILIMETER WAVES:-
widely used for short range communication , unable to
pass through solid objects , used for indoor wireless
LANs , not for outdoors.
LIGHT WAVE TRANSMISSION:- unguided optical
signal such as laser , unidirectional , easy to install , no
license required.
PROBLEMS:- unable to penetrate rain or thick fog , laser
beam can be easily diverted by air.

18.  CELLULAR SYSTEM
 WIRELESS LANs
 SATELLITE SYSTEM
 PAGING SYSTEM
 PANs(BLUETOOTH)

19. Definition
 Wireless communication
technology in which several
small exchanges (called cells)
equipped with low-power radio
antennas (strategically located
over a wide geographical area)
are interconnected through a
central exchange. As
a receiver (cell phone) moves
from one place to the next,
its identity, location, and
radio frequency is handed-over
by one cell to another without
interrupting a call.
Practical

20.  By systematically spacing base stations and the
channel groups may be reuse as many number of times
as necessary.
MSC
CELLS
PSTN
SUBSCRIBER
UNIT
BASE
STATIONS
Coverage
area

21.  NSS = MSC + HLR + VLR + AUC + EIR
MANAGE
COMMUNICATION
B/W USERS
INCLUDE
DATABASE TO
STORE
INFORMATION
OF USER
CALL
CONTROL
MOBILITY
MGMT
SUBSCRIBER
DATA
HANDLING
CHECK
IDENTITY OF
USER
PERMANENT
STORAGE OF
USER
INFORMATION
STORE
A COPY
OF HLR
CHECK
ROAMI
NG
PROVIDE
AUTHENT
ICATION
SECURITY
CHECK
IMEI
NUMBER
OF
MOBILE

22. PARAMETERS OPTICAL FIBER WIRELESS SYSTEM
1) Basically define It is wired system and used
light for comm.
It is wireless system and used
electromagnetic waves for
comm.
2) Main Principle Total internal reflection. Modulation and demodulation
techniques are used.
3) Component For transmission- LED and
LASER
For receiver-PHOTODIODE
ANTENNA, MODULATOR
and DEMODULATOR
4) Frequency Approx 180 THz to 330 THz Approx 300 GHz to 3000GHz
5) Loss 0.002db/km (approximate),
scattering and absorption
problems.
Low bandwidth, Weather
problems, Interference
problems.
6) Applications Telecommunication,
Imaging optics , Endoscope
Mobile phones, broadcasting,
Wireless fidelity (Wi-Fi),
Satellite communication.

23. A huge amount of development can be made by making
further research and work on fiber optics .We need it
for a faster and more sophisticated infrastructure
which would be the prime demand of the ever growing
population of tomorrow.
At present there are many optical fibre communication
links throughout the world without using optical
solutions. When we introduce optical solutions as light
pulses through the fibres, we can achieve high quality
telecommunication at a lower cost. We can expect a
great revolution in optical fibre communication within
a few years by means of solutions.

24. 1) Eagle’s Prakashan (Regd.) optical fiber communication, Rajesh
Kumar
2) http://www.gatewayforindia.com/technology/opticalfiber.htm
3) http://www.vigyanprasar.gov.in/wos/optical.htm
4) http://en.wikipedia.org/wiki/Optical_fiber
5) T Okoshi and K Kikuchi, Coherent optical fibre
communication (Kluwer Academic, Boston)
6) http://wsl.stanford.edu/~andrea/Wireless/SampleChapters.pdf
7) http://www.authorstream.com/Presentation/amitsorot-1373854-
wireless-communication/