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Eko Fajar Cahyadi
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ekofajarcahyadi@ittelkom-pwt.ac.id
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infotel@ittelkom-pwt.ac.id
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Lembaga Penelitian dan Pengabdian Masyarakat (LPPM) Institut Teknologi Telkom Purwokerto Jl. D. I. Panjaitan, No. 128, Purwokerto 53147, Indonesia
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INDONESIA
Jurnal INFOTEL
Published by Universitas Telkom
ISSN : 20853688     EISSN : 24600997     DOI : https://doi.org/10.20895/infotel.v15i2
Core Subject : Science, Engineering,
Computer Science & IT Electrical & Electronics Engineering
Jurnal INFOTEL is a scientific journal published by Lembaga Penelitian dan Pengabdian Masyarakat (LPPM) of Institut Teknologi Telkom Purwokerto, Indonesia. Jurnal INFOTEL covers the field of informatics, telecommunication, and electronics. First published in 2009 for a printed version and published online in 2012. The aims of Jurnal INFOTEL are to disseminate research results and to improve the productivity of scientific publications. Jurnal INFOTEL is published quarterly in February, May, August, and November. Starting in 2018, Jurnal INFOTEL uses English as the primary language.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 6 Documents
 1 
Search results for , issue "Vol 4 No 2 (2012): November 2012" : 6 Documents clear
Modulasi Digital Menggunakan Matlab Wahyu Pamungkas; Anggun Fitrian Isnawati; Adi Kurniawan
JURNAL INFOTEL Vol 4 No 2 (2012): November 2012
Publisher : LPPM INSTITUT TEKNOLOGI TELKOM PURWOKERTO

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20895/infotel.v4i2.102

Abstract

In telecommunication systems, the determination of the modulation system is an important method in the process of sending information from transmitter to receiver. In the simulation that is done using QPSK modulation system (Quadrature Phase Shift Keying), 8-QAM (Quadrature Amplitude Modulation), 16-QAM (16-Quadrature Amplitude Modulation) that uses AWGN (Additive White Gaussian Noise) channel in the transmission system uses MATLAB software. The execution of the simulation is aimed to describe how the characteristics of the waveform of each block of the modulator, to add noise in the AWGN channel and demodulator. Performance of modulation system testing is used BER (bit error ratio) method. Looking of the faults of comparison bits results of before and after the transmitted bits by using Monte Carlo simulation model. Testing on this simulation using the input data as much as 10.000 data symbols randomly and the level of Eb/No that is various for each modulation used. Performance results BER with the level of Eb / No at 1 dB of the simulated system modulation on the BER values obtained for QPSK 0.0570, 8-QAM at 0.1085 while the 16-QAM at 0.1582 and then the performance of QPSK modulation is the best. If the Eb / No is increased to 8 dB then the becomes BER QPSK smaller modulation is equal to 0.00035, the 8-QAM BER obtained at 0.0076, while the 16-QAM modulation to be 0.0139
Analisis Algoritma Insertion Sort, Merge Sort Dan Implementasinya Dalam Bahasa Pemrograman C++ Arief Hendra Saptadi; Desi Windi Sari
JURNAL INFOTEL Vol 4 No 2 (2012): November 2012
Publisher : LPPM INSTITUT TEKNOLOGI TELKOM PURWOKERTO

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20895/infotel.v4i2.103

Abstract

This paper presents the study of implementation and performance in sorting process, using two different algorithms, namely Insertion Sort and Merge Sort. In the first stage, the two algorithms were implemented in C++ language to sort several numbers typed by a user. In the second stage, the source codes for those algorithms were modified to enable sorting randomly generated numbers with the amount as requested by the user. To find out how well they performed in sorting out the data, therefore in the last stage the two algorithms were tested to sort random numbers with predetermined amount ranges and the results were compared. From the experiments performed, merge sort algorithm had shown a better performance, particularly in a large number of data (> 10000). Insertion sort algorithm has the advantage in lower complexity algorithm, notably in the best case condition and since it does not use recursion routines in sorting process, hence it does not require as much storage space or memory as needed by merge sort algorithm.
Desain Antena Wi-Fi Dengan Media Seng Eka Wahyudi; Adnan Purwanto; Teguh Iklas
JURNAL INFOTEL Vol 4 No 2 (2012): November 2012
Publisher : LPPM INSTITUT TEKNOLOGI TELKOM PURWOKERTO

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20895/infotel.v4i2.104

Abstract

Teknologi Internet berbasis Wi-Fi dibuat dan dikembangkan di Amerika Serikat yaitu oleh Institute of Electrical and Electronis Engineers (IEEE) yang berdasarkan kelompok standar teknis perangkat bernomor IEEE 802.11. Perangkat Wi-Fi sebenarnya tidak hanya mampu bekerja di jaringan Wireless Local Area Network (WLAN), tetapi juga di jaringan Wireless Metropolitan Area Network (WMAN). Kuantitas pengguna Internet berbasis teknologi Wi-Fi yang semakin meningkat di berbagai belahan dunia, telah mendorong internet service providers (ISP) untuk membangun hotspot yang di berbagai kota-kota besar. Hotspot merupakan suatu tempat dimana tersedianya koneksi jaringan di mana para pemakai dapat melakukan akses Internet dengan cara nirkabel (wireless) tanpa tergantung kepada jaringan fisik. Jangkauan hotspot dapat dimaksimalkan dengan memanfaatkan antena dengan desain khusus sehingga cakupan (coverage) pancaran sinyal lebih luas. Proses pembuatan desain antena dengan media seng yang diaplikasikan untuk hotspot Wi-Fi pada outdoor diawali dengan perhitungan link budget, antara lain gain dan beamwidth dari antena. Proses pengukuran sinyal diukur dengan menggunakan bantuan software NetStumbler.
Analisis Kualitas Jaringan Akses Tembaga Terhadap Layanan Speedy Studi Kasus Di PT.Telkom,Tbk Divisi Access Site Operation Purwokerto Wahyu Pamungkas; Nunung Sadtomo; Erlinda Febrianingtyas
JURNAL INFOTEL Vol 4 No 2 (2012): November 2012
Publisher : LPPM INSTITUT TEKNOLOGI TELKOM PURWOKERTO

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20895/infotel.v4i2.105

Abstract

The development of fast evolving telecomunication technologies starting from communications cable to wireless communications. One of the communication cable for data is a technology Asymetric Digital Subscriber Line (ADSL). ADSL technology is an access technology that enable data communications, voice and video simultaneously at cooper access network media. Speedy service is one example of the use of ADSL technology. Telkom Speedy offers internet access speeds ranging from 384 Kbps for downstream speed and 3 Mbps for upstream speed. Speed of access internet is affected by the quality of the network. Parameters that effect the quality of network are : attenuation, Signal to Noise Ratio (SNR), Packet Loss, Bit Error Ratio (BER), jitter and time to life (TTL). In this study analysis of network quality affected by these parameters were measured advance to the quality of the network by using the EMBASSY software, while the perform measurements speedtest by using internal web aplications PT.Telkom,Tbk. After measurement is complete then performed the analysis for determine network quality. Based on observations can be known on the upload and download speed the capacity of 384 Kbps, 1024 Kbps and 3 Mbps. Of these three on capacity can be known to the average percentage of the upload speed is found to be 83,33 %, while the percentage of download speeds is found to be 76,67 %
Perancangan Cakupan Area Long Term Evolution (LTE) Di Daerah Banyumas Alfin Hikmaturokhman; Anggun Fitrian Isnawati; Upit Herlina
JURNAL INFOTEL Vol 4 No 2 (2012): November 2012
Publisher : LPPM INSTITUT TEKNOLOGI TELKOM PURWOKERTO

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20895/infotel.v4i2.106

Abstract

Rancang Bangun Sistem Informasi Jadwal Perkuliahan Berbasis Jquery Mobile Dengan Menggunakan PHP Dan MySQL Elisa Usada; Yana Yuniarsyah; Noor Rifani
JURNAL INFOTEL Vol 4 No 2 (2012): November 2012
Publisher : LPPM INSTITUT TEKNOLOGI TELKOM PURWOKERTO

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20895/infotel.v4i2.107

Abstract

Informasi perubahan jadwal perlu diberitahukan secepatnya kepada dosen dan mahasiswa.Aplikasi Sistem Informasi Jadwal Perkuliahan berbasis jQuery Mobile dengan menggunakan PHP dan MySQL pada proyek penelitian ini diharapkan mempermudah pemberitahuan perubahan jadwal kepada dosen dan mahasiswa.Dengan dibuat aplikasi Sistem Informasi Jadwal Perkuliahan berbasis jQuery Mobile dengan menggunakan PHP dan MySQL pada proyek penelitian ini dapat mempermudah dalam mencari informasi jadwal perkuliahan.Metode yang digunakan dalam rancang bangun aplikasi sistem informasi jadwal perkuliahan yaitu metode waterfall. Pengujian aplikasi sistem informasi jadwal perkuliahan menggunakan beberapa tahapan yaitu tahap pengujian integrasi, pengujian sistem, pengujian validasi dan pengujian penerimaan pada handphone. Pada aplikasi ini digunakan database MySQL untuk penyimpanan data-data jadwal perkuliahan, dan pembuatan aplikasi ini dibuat menggunakan PHP. untuk mendapatkan hasil yang lebih baik lagi adapun saran-saran yang dapat diberikan terhadap aplikasi sistem informasi jadwal perkuliahan ini yaitu mengintegrasikan aplikasi sistem informasi jadwal perkuliahan ini dengan sistem kampus dan melakukan update pada jQuery Mobile ke versi yang terbaru agar tampilan lebih baik serta memiliki keunggulan tambahan.

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