wireless communication systems-classifications

1. classifications
Suryaan Kaushikeyan
Venkatesh pulugurtha
by

2.  The wireless communication systems actually
an idea emerged in 1980’s and it is developed
 In the view of user(application or company) to
make data portable,mobile and accessible
then wireless communication is the better
answer
 In order to avoid complete cable
problems(expenses on installing lot of cables)
 To save time and money
 Used in public
places(library,cafetaries,institutions,Govt.offices
etc)

3.  Electromagnetic radiation
 Emitted by sinusoidal current running
through a wire (transmitting antenna)
 Creates propagating sinusoidal magnetic
and electric fields according to Maxwell’s
equations:
 Fields induce current in receiving antenna

4. electric
field
magnetic
field
propagation direction

5. The wireless communication System
(WCS)
A network protocol that enables online
content to be viewed via devices and
Electonic gadgets like
cellphones,laptops and tablets and
handhelds is called a wireless network.
The communication made possible by
this wireless network is called as wireless
communication system. Wireless
data communication technologies
includes:
Wireless local area network
satellite and cellular networks
Bluetooth and ultra wide
band

6.  Wireless
 describes devices and technologies,that are
not connected by wire.
 Wireless communications
 Transmission of user data without the use of
wires
 Wireless data communication technologies
include:
 bluetooth
 Wireless LAN and WAN
 Satellite
 cellular

7.  Used to transmit data over
very long distance
 Repeater
 Located in satellite itself
 Simply “repeats” the same
signal to another location
 Used to transmit data from one
earth station to another
 Transmission time is
approximately 250 milliseconds

10. Modern cellular telephone
network
 built around the concept of
local power transmitters.
 with each “cell’’ handling a
number of users.
 Trasmission towers are spread
through out a geographical
area.
 The same radio channel can
be used by another tower.
o Located a few miles away to
avoid interference.

11.  3G(third generation) technology
 Uses 100% digital transmission for both
voice and data.
 Tranmission speed
 Up to 2Mbps when stationary
 384 Kbps for slow-moving pedestrains.
 Up to 144 Kbps from a moving vehicle.
 2.5G has a maximum data transmission
rate of up to 384 Kbps.

13.  BLUETOOTH:
 Distance:300 feet(90 mts)
 Bandwidth:54Mbps
 Can also include voice over
IP(VOIP)
 ULTRAWIDEBAND:
 Distance:150 feet(50 mts)
 Bandwidth:100 Mbps to 2
Gbps

15.  Wireless Local Area Network(WLAN):
 Extension of a wired LAN.
• Connecting to it through a device called a
wireless access point.
 Access point(AP):
 Relays data signals between all of the
devices in the network.
• Each computer on the WLAN has a wireless
network interface card(NIC)
 With an antenna built into it.

22.  Wireless Applications:
 Government and Military
 Travel
 Environmental research and education
 Industrial control
 Advantages:
 Mobility
 Easier and less expensive installation
 Disaster recovery
 Disadvantages:
 Radio signal interference
 Security
 Health risks

23.  Wireless networks and devices are
found in all circles of life today
 Wireless communications have
become commonplace
 Enable companies of all sizes to
interconnect their offices
 WLAN applications are found in
wide variety of industries and
organizations.
 Used as remote sensors