wireless communication past present and future

7/21/2019 Wireless Communication Past Present and Future

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WirelessWireless

Communication:Communication:

Past, Present, andPast, Present, and

FutureFuture

Ericko YuliantoEricko YuliantoEngineering 302Engineering 302

May 7, 2002May 7, 2002



Before the “Birth ofBefore the “Birth of

Radio”Radio”

James Clerk MaxwellJames Clerk Maxwell– A brilliant matematicianA brilliant matematician

– Maxwell’s Differential EquationMaxwell’s Differential Equation

– !eories o" relati#ity!eories o" relati#ity

$einric %u&ol" $ert'$einric %u&ol" $ert'– A (ro"essor o" (ysicsA (ro"essor o" (ysics

– Ex(eriments &ealing wit electric wa#esEx(eriments &ealing wit electric wa#es– )irst to broa&cast an& recei#e ra&io)irst to broa&cast an& recei#e ra&io

wa#eswa#es



ContinuedContinued

E&ouar& *ranlyE&ouar& *ranly– CohererCoherer wireless &etectorwireless &etector

+li#er Jose( o&ge+li#er Jose( o&ge– -esigne& a stan&ar& &etector in early wireless-esigne& a stan&ar& &etector in early wireless

telegra( recei#erstelegra( recei#ers

Alexan&er .o(o#Alexan&er .o(o#– %a&io in#entor /1%a&io in#entor /1

http://f3wm.free.fr/sciences/coherer1.jpg



The “Birth of Radio”The “Birth of Radio”

uglielmo Marconiuglielmo Marconi

– E&ucate& in Englan& an& talyE&ucate& in Englan& an& taly

– $ert'4s &eat "ire& Marconi wit i&ea$ert'4s &eat "ire& Marconi wit i&ea

– Ex(erimente& in transmitting &etectableEx(erimente& in transmitting &etectable

Morse signal o#er a certain range5Morse signal o#er a certain range5

– rante& a *ritis (atent in Marc 687rante& a *ritis (atent in Marc 687

– !e 9ireless !elegra( an& :ignal!e 9ireless !elegra( an& :ignalCom(anyCom(any



TransoceanicTransoceanic

CommunicationCommunication

!o break te isolation o" te sea!o break te isolation o" te sea

)irst (erson to bri&ge te Atlantic by)irst (erson to bri&ge te Atlantic by

wirelesswireless;se& in commercial an& &e"ense;se& in commercial an& &e"ense

si(ssi(s

Titanic Titanic inci&ent – sa#e& some 6,<00inci&ent – sa#e& some 6,<00(eo(le(eo(le

n#ol#e& ea#ily in 9orl& 9ar n#ol#e& ea#ily in 9orl& 9ar



The Growth of RadioThe Growth of Radio

StationStation

)irst broa&caster= >->A in .ittsburg)irst broa&caster= >->A in .ittsburg

/?o#ember 2, 68201/?o#ember 2, 68201

n less tan @ monts, o#er 2<0 newn less tan @ monts, o#er 2<0 newstation licenses are grante&5station licenses are grante&5

!e ;5: go#ernment restricts!e ;5: go#ernment restricts

broa&casting to s(eci"ic wa#elengt5broa&casting to s(eci"ic wa#elengt5

A&#ertising on ra&io= AmericanA&#ertising on ra&io= American

!ele(one an& !elegra( Com(any!ele(one an& !elegra( Com(any



ContinuedContinued

E&war& $owar& Armstrong=E&war& $owar& Armstrong=

)reuency Mo&ulation /)M1 in 683<)reuency Mo&ulation /)M1 in 683<

)irst use& "or (ublic sa"ety use&5)irst use& "or (ublic sa"ety use&5

n#ol#e& in 9orl& 9ar n#ol#e& in 9orl& 9ar

– Motorola4s $an&ieB!alkie an& 9alkieBMotorola4s $an&ieB!alkie an& 9alkieB

!alkie!alkie

.ostBwar ri#al= tele#ision.ostBwar ri#al= tele#ision



Telephone-Radio EraTelephone-Radio Era

ars Magnus Ericssonars Magnus Ericsson

– .artnere& wit Carl An&ersson.artnere& wit Carl An&ersson 5M5M

Ericsson an& Co5Ericsson an& Co5

66= )irst Ericsson tele(ones were66= )irst Ericsson tele(ones were

use&use&

6860= CarBtele(one6860= CarBtele(one

Early 6820s= Mobile ra&io tele(oneEarly 6820s= Mobile ra&io tele(one

systems "or (olice car &is(atc5systems "or (olice car &is(atc5



ContinuedContinued

682= al#in Manu"acturing Co5682= al#in Manu"acturing Co5 MotorolaMotorola

683= )e&eral Communications683= )e&eral Communications

CommissionCommission

68@= A!D! an& :outwestern *ell68@= A!D! an& :outwestern *ell

intro&uce& te "irst Americanintro&uce& te "irst American

commercial mobile ra&ioBtele(onecommercial mobile ra&ioBtele(one

– :ix cannels in 6<0 M':ix cannels in 6<0 M'



ContinuedContinued

Cellular (oneCellular (one

– -5$ %ing an& 95%5 Young "rom *ell-5$ %ing an& 95%5 Young "rom *ell

aboratories /6871aboratories /6871

– A network o" small geogra(ical areasA network o" small geogra(ical areas

/calle& cells1/calle& cells1

– Ja(anese ri#al= MotorolaJa(anese ri#al= Motorola

– 6876 ntel intro&uce& te "irst6876 ntel intro&uce& te "irstmicro(rocessormicro(rocessor



ContinuedContinued

Euro(e= rou(e :(eciale MobileEuro(e= rou(e :(eciale Mobile

/:M1/:M1

– *egan in 682 by a grou( o" 2@*egan in 682 by a grou( o" 2@

Euro(ean national (one com(aniesEuro(ean national (one com(anies

– n many res(ects was better &esigne&n many res(ects was better &esigne&

– ?ort American counter(art= .C: 6800?ort American counter(art= .C: 6800



FutureFuture

-igital tecnology-igital tecnology– ) .rocessing) .rocessing

– $ig :(ee& -:. .rocessors$ig :(ee& -:. .rocessors

– %econ"igurable Arcitecture%econ"igurable Arcitecture

MicrocellMicrocell– +ne to two or&ers o" magnitu&e smaller+ne to two or&ers o" magnitu&e smaller

tan te current cellular systemtan te current cellular systemCost will signi"icantly &ecreaseCost will signi"icantly &ecrease

Easy an& "lexible im(lementationEasy an& "lexible im(lementation

wireless communication past present and future

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