99561420 wireless communication ppt

8/18/2019 99561420 Wireless Communication Ppt

1/20

WIRELESS

COMMUNICA

TIONBY

INDU SAGAR

10R91A04A2

TEJASWINI

10R91A0449


2/20

contentsINTRODUCTION

History

Wir!ss "o##$%i"&tio%

A''!i"&tio%s

C&t(oris o) *ir!ss i#'!#%t&tio%s+,-i"s &%, st&%,&r,s

Co%"!$sio%


3/20

I%tro,$"tio%.

In 1895,Guglielmo Marconi opened the wayfor modern wireless communications bytransmitting the three-dot Morse code for theletter ‘! o"er a distance of three #ilometersusing electromagnetic wa"es$

%rom this beginning, wireless communications

has de"eloped into a #ey element of modernsociety$

%rom satellite transmission, radio andtele"ision broadcasting to the now ubi&uitous

mobile telephone, wireless communicationshas re"olutioni'ed the wa societies function$


4/20

History. (he term )*ireless) came into public use to refer to a radio recei"er or

transcei"er, establishing its usage in the +eld of wireless telegraphy early on

ow the term is used to describe modern wireless connections such as incellular networ#s and wireless broadband Internet$

It is also used in a general sense to refer to any type of operation that isimplemented without the use of wires, such as )wireless remote control) or)wireless energy transfer), regardless of the speci+c technology that is used toaccomplish the operation$

EARLY WIRELESSWOR/.

191/ - %irst "oice o"er radio transmission$

190s - Mobile recei"ers installed in police cars in 2etroit$

193s - Mobile transmitters de"eloped4 radio e&uipment

occupied most of police car trun#$

1935 - %re&uency modulation %M6 demonstrated by 7rmstrong

19/s - Maority of police systems con"erted to %M$


5/20


6/20

WIRELESS

COMMUNICATION.*ireless communication is the transfer of information o"er a

distance without the use of electrical conductors or )wires$

(he distances in"ol"ed may be short a few meters as in

tele"ision remote control6 or long thousands or millions of #ilometers for radio

communications6$

*hen the conte:t is clear, the term is often shortened to)wireless)$

*ireless communication is generally considered to be a

branch of telecommunications$


7/20

ELECTROMAGNETIC SECTRUM.;ight, colors, 7M and %M radio and electronic

de"ices ma#e use of the electromagneticspectrum$

In the


8/20


9/20

ALICATIONS O WIRELESS

TECHNOLOGY.1 SECURITY SYSTEMS.

7nti-theft >eporting

?mergency >eporting7rm@2isarm by M

Monitoring@ (al#ing

Aower %ailure >eporting


10/20

2 TELE3ISION REMOTE CONTROL.

7 remote control is an electronic de"ice used

for the remote operation of a machine$=ommonly, remote controls are consumer I>

de"ices used to issue commands from adistanceto (B or 2B2

Most of these remotes communicate to theirrespecti"e de"ices "ia infrared signals and fewradio signals$


11/20

CELLULAR TELEHONY. 5HONES AND MODES6

(he best #nown e:ample of wirelesstechnology is the cellular telephone andmodems$

(hese instruments use radio wa"es to enable

the operator to ma#e phone calls from manylocations world-wide$


12/20


13/20

4WI7I.

*i-%i technology deli"ers highly sophisticated

phones to ta#es you towards new roads ofe:cellence$

*i %i phones pro"ides you with a new andcost-eCecti"e way to tal# o"er the Internet,

with great functionality li#e 3G =alling, =all*aiting, =all (ransfer and many other usefulfeatures$

%i phones are a"ailable with the brands such

as o#ia, ony ?ricsson, Motorola, amsung


14/20


15/20

8 WIRELESS ENERGY TRANSER.

*ireless energy transfer is a process whereby

electrical energy is transmitted from a powersource to an electrical load that does not ha"ea built-in power source, without the use ofinterconnecting wires $


16/20


17/20

COMUTER INTERACE DE3ICES.


18/20


19/20

: CATEGORIES O WIRELESSIMLEMENTATION+DE3ICES AND STANDARDS.

>adio communiction system

Eroadcasting7mateur radio

;and Mobile >adio

=ommunication >adio

=ordless (elephonyH2?=(2igital ?nhanced =ordless (elecommunication6

=ellular ystemsHG,1G,0G,3G,Eeyond3G/G6,%uture wireless


20/20

CONCLUSION.

Ey using wireless communication we can easily transfer the databecause it is portable>eliable;ightweight 7nd cheap in cost

99561420 wireless communication ppt

Documents