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ALOKASI FREKUENSI RADIO DANALOKASI FREKUENSI RADIO DAN
MEKANISME PERAMBATANMEKANISME PERAMBATAN
MK DASAR TELEKOMUNIKASIMK DASAR TELEKOMUNIKASI
Novy NRA MokobombangNovy NRA Mokobombang
TEKNIK ELEKTRO UNIVERSITA S TEKNIK ELEKTRO UNIVERSITA SHASANUDDINHASANUDDIN
FEBRUARI 2009FEBRUARI 2009
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OVERVIEWOVERVIEW
BackgroundBackground
VisionVisionThe scenariosThe scenarios
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Scenario 1 - Residential High SpeedScenario 1 - Residential High Speed
Internet AccessInternet Access
Scenario 2 - Broadband Internet Access inScenario 2 - Broadband Internet Access in
Remote Area using LOS connectionRemote Area using LOS connection
THE SCENARIOS THE SCENARIOS
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http://apollo.lsc.vsc.edu/classes/met130/notes/chapter1/graphics/ion_layers.jpg
The Ionosphere and Radio
Wave Propagation The ionosphere is important for
radio wave (AM only)
propagation....
ionosphere is composed of the
D, E, and F layers
the D layer is good at absorbing
AM radio waves
D layer dissapears at night.... the
E and F layers bounce the
waves back to the earth
this explains why radio stationsadjust their power output at
sunset and sunrise
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Gelombang radioGelombang radio
gelombang yang memiliki frekuensi paling kecil ataugelombang yang memiliki frekuensi paling kecil atau
panjang gelombang paling panjang (1 cm sampaipanjang gelombang paling panjang (1 cm sampai
ratusan m)ratusan m)
Frekuensi radio (radio frequency : RF) adalah frekuensi
yang digunakan sebagai carrier / pembawa pada
komunikasi radio
Suatu sistem telekomunikasi yang menggunakan RFSuatu sistem telekomunikasi yang menggunakan RF
sebagai pembawa sinyal informasinya terdiri dari antenasebagai pembawa sinyal informasinya terdiri dari antena
pemancar dan antena penerima.pemancar dan antena penerima.
BACKGROUNDBACKGROUND
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BACKGROUNDBACKGROUND
Gelombang radio berada dalam rentangGelombang radio berada dalam rentang
frekuensi meliputi beberapa Hz sampaifrekuensi meliputi beberapa Hz sampai
gigahertz (GHz atau orde pangkat 9).gigahertz (GHz atau orde pangkat 9).
Gelombang ini dihasilkan oleh alat-alatGelombang ini dihasilkan oleh alat-alat
elektronik berupa rangkaian osilator elektronik berupa rangkaian osilator
(variasi dan gabungan dari komponen(variasi dan gabungan dari komponen
Resistor (R), induktor (L), dan kapasitor Resistor (R), induktor (L), dan kapasitor (C)).(C)).
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BACKGROUNDBACKGROUND
1 http://aro.as.arizona.edu/outreach/posters/radiowaves.pdf
Frequency = Speed of Light /
Wavelength
ν = c / λ
(Hz or Cycles per Second are the basic
unit of Frequency)
Wavelength = Speed of Light /
Frequencyλ = c /ν
(Micron, 1/1,000,000 of 1 meter or 10-6m,
is the basic unit for measuring the
wavelength)
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VISIONVISION
Company’s vision:Company’s vision:
A nation wide WiMAX coverage andA nation wide WiMAX coverage and
commercial services to mitigate digitalcommercial services to mitigate digitaldivide within 5 yearsdivide within 5 years
The planning is designed to make thatThe planning is designed to make thatvision feasible and to turn digital dividevision feasible and to turn digital divide
into ICT digital bridge regioninto ICT digital bridge region
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Scenario 1 - Residential High SpeedScenario 1 - Residential High Speed
Internet AccessInternet Access
Scenario 2 - Broadband Internet Access inScenario 2 - Broadband Internet Access in
Remote Area using LOS connectionRemote Area using LOS connection
THE SCENARIOS THE SCENARIOS
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THE SCENARIOSTHE SCENARIOS
Scenario 1 - Residential High Speed Internet Access
IP Transport
Laptop
Desktop
PDA
WiMAX BS WiMAX BS
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WiMAX be a competitor for areas thatWiMAX be a competitor for areas that
currently used xDSL or Cable technologycurrently used xDSL or Cable technologyin urban areas.in urban areas.
It will be deployed as a replacement for It will be deployed as a replacement for wired connections.wired connections.
Hopefully can provide a reasonable,Hopefully can provide a reasonable,reliable and ascendible internet accessreliable and ascendible internet access
THE SCENARIOS
enario 1 - Residential Hi Speed Internet Access
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THE SCENARIOSTHE SCENARIOS
cenario 2 - Broadband Internet Access in Remote
Area using LOS connection
Residential/SOHO
broadband
Wireless backhaufor hot spots
DSL level servicefor small business
Telco central office or
Fiber (private) network
Internet
backbone
P2P for connecting BS
& feeding cellular towers
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WiMAX deployment can easily reachWiMAX deployment can easily reachremote area but economically infeasibleremote area but economically infeasibleto reach by xDSL or cable technologies.to reach by xDSL or cable technologies.
The area consists of urban housing,The area consists of urban housing,SME and small businesses such asSME and small businesses such asfarming, home industries and miningfarming, home industries and miningcompanycompany
THE SCENARIOS
Scenario 2 - Broadband Internet Access inRemote Area using LOS connection
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Question
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This presentation is a part of the This presentation is a part of the
assignment for Technical Planassignment for Technical Plan
subject, lecturer : Herman Riezebossubject, lecturer : Herman RiezebosMSTM program, HAN University of MSTM program, HAN University of
Applied SciencesApplied Sciences