*Sistem Komunikasi I

Dr. Arfianto Fahmi

*Outline Kontrak BelajarSilabus PerkuliahanDasar Komunikasi

SISTEM KOMUNIKASI I (TTG3A3)Kelas : TT-37-G1Jadwal KuliahSelasa 10.30 R.B105Kamis 10.30 R.207Dosen : TimPrasyarat : Rangkaian ListrikSinyal dan SistemKalkulusProbabilitas dan Statistika*

Komponen PenilaianUTS : 35 %UAS : 40 %QUIZ : 12.5 %TUGAS : 12.5 %Syarat minimal kehadiran : 75 %*

Rencana Materi KuliahReview Transformasi FoerierSistem Amplitude Modulation (AM)Sistem Frequency Modulation (FM)Noise pada Sistem KomunikasiSistem Pradeteksi dan KinerjanyaKinerja/performansi sistem AM dan FMADC dan MultiplexingPengantar Komunikasi Digital

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*Overview

*Communication System

*Frequency For Wireless Communication

*Digital Communication State of the art of CommunicationAdvantages of digital communications:Regenerator receiver

Different kinds of digital signal are treated identically.DataVoiceMediaPropagation distanceOriginalpulseRegeneratedpulseA bit is a bit!

*Transmission Terminology

*Type Of Media TransmissionGuided MediaConductive metaltwisted pair, coaxial cableGlass or plasticfiber opticsMicrowaveterestrial, satellite

*Guided Media (Wireline)Twisted Pair CableCoaxial Cables

*Microwave System

Transmission between two ground stationsDistance 50 km (depend on the height of antennas)Microwave links are widely used to provide communication links when it is impractical or too expensive to install physical transmission media.

Long Haul Radios: ~ 30 - 80 km 2 GHz, 7 GHzMedium Haul Radios: ~ 25 - 45 km 10 GHz, 13 GHz, 15 GHzShort Haul Radios: ~ 5 - 30 km 18 GHz, 23 GHz, 26 GHz, 38 GHz,

*Satellite / VSAT System

Receive and retransmit using transponderSeparate frequencies are assigned forupward transmission (uplink)downward transmission (downlink)The optimum frequency range for satellite transmission is in the range 1 to 10 GHz. Below 1 GHz, there is significant noise from natural sources, atmospheric noise, and noise from electronic devices. Above 10 GHz, the signal is attenuated by atmospheric absorption.

*Optical Fiber

*Celluler Network

*Noise, Interferensi, MultipathNoiseSinyal pengganggu yang dihasilkan oleh alam maupun manusiaSifat : wideband, daya rendah, aditifInterferensi, JammingSinyal pengganggu dari sistem lain yang mempunyai frekuensi yang samaSifat : narrow band, daya tinggiMultipathSinyal dengan perambatan yang berbedatfV, PV, Pinterfererf

*Redaman dan Distorsi SinyalDi dalam media transmisi, sinyal akan mengalami dua hal:Redaman, penurunan intensitas sinyal membatasi jarakDistorsi, perubahan bentuk sinyal akibat perubahan fasa, frekuensi, dan polarisasi

*End