Articles

SIMULASI SISTEM INFORMASI GEOGRAFIS (SIG) PEMANTAUAN POSISI KENDARAAN VIA SMS GATEWAY Hanifah, Raidah; Isnanto, R. Rizal; Christyono, Yuli
Transmisi Vol 12, No 2 (2010): TRANSMISI
Publisher : Departemen Teknik Elektro, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (328.069 KB) | DOI: 10.12777/transmisi.12.2.45-49

Abstract

Nowadays a vehicle position monitoring system has started to be built  as its rising demand. A system with capability to trace the position of a vehicle by its owner or third party is well known as vehicle tracking system. This system provide many advantages, therefore in this Final Project a simulation of Geographic Information System (GIS) for Vehicle Position Tracking via SMS Gateway System is made. This system contains two main parts, those are device part and application part. Device part is simulated with a device simulation program. On the other side, application part will show the position information which sent by device par. The information is shown as a graphic with a map as the background. These two parts are developed by Delphi 7.0 programming language and MySQL 5.0 as a database storage. To show the map and mapping functions in this application, an additional program MapObject 2.0 is used. The function of SMS Gateway is connects the device part and application part, and software for this function is Gammu 1.25. This research results a simulation to monitor vehicle position system. The testing results show that this system works properly, and all functions work well as it purposes. The application part shows the position data from device part as pointed tracks in a map. Communication between GIS application part and  device part via Gammu also works properly, with average interval of SMS sending time and receiving time is 17,8 seconds. Keyword :   Geographic Information System (GIS), Position monitoring, SMS Gateway, Gammu.
PENYEMBUNYIAN DATA RAHASIA PADA CITRA DIGITAL BERBASIS CHAOS DAN DISCRETE COSINE TRANSFORM Prabowo, Anton; Hidayatno, Achmad; Christyono, Yuli
Transmisi Vol 13, No 2 (2011): TRANSMISI
Publisher : Departemen Teknik Elektro, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (537.527 KB) | DOI: 10.12777/transmisi.13.2.46-52

Abstract

Steganography is one of technique that developed to keep the security of data by hidding or embedding it in other data media so that it?s content or even it?s existence is not notice. Many steganography methode have been developed in the last few years, but it still needed a steganography system with highest capacity and robustness. By combining and modifying few technic, in this Final Project has made a steganography system that used to embedding and extracting secret data in image data form (BMP 8 bit grayscale and 24 bit color), voice data form (WAV PCM 11.025 KHz 8 bit mono), and text data form (TXT) into cover data in image data form (BMP 8 bit grayscale). Data hidding was done at frequency domain by applying DCT (Discrete Cosine Transform) and chaos theory was applied using logistic map equation. Program was made using Borland Delphi 7 programming language. By using subjectif quality, RMS (Root Mean Square) metrics, and similarity ratio measurement parameter, program performance was observed by doing research consist of: research of initialitation parameter change influences; research of embedding and extracting secret digital data in image, voice, and text form into cover digital data in image form; research of program realibility from data manipulation operation including brigthness modification, contrast modification, resizing, cropping, and JPEG compression. Keyword : steganography, discrete cosine transform, chaos theory, logistic map, root mean square.
PERANCANGAN DAN ANALISIS ANTENA MIKROSTRIP DENGAN FREKUENSI 850 MHZ UNTUK APLIKASI PRAKTIKUM ANTENA Nugraha, Adhe Setya; Christyono, Yuli; Sukiswo, Sukiswo
Transmisi Vol 13, No 1 (2011): TRANSMISI
Publisher : Departemen Teknik Elektro, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (487.192 KB) | DOI: 10.12777/transmisi.13.1.39-45

Abstract

Problems antenna of conductor materials is rather complicated construction and size are usually quite large, so for purposes such as a cellular system is considered less efficient. For this purpose requires a simple antenna, a thin, easy to manufacture, and can be connected with other circuits. Then came the idea to design a microstrip antenna that antenna. How to make a microstrip antenna is printed on the plate by the PCB (Printed Circuit Board), then peradiasinya coated with a solution of silver or other conductor material. Who's lining material that many in the market is epoxy glass fiber (e r = 4.7) with 1.5 mm layer thickness. The purpose of this thesis is to create some models of microstrip antenna that can later be used in practical antenna. The antenna was designed at a frequency of 850MHz with a square, equilateral triangle, and circle. Then the three forms of microstrip antenna design results will be analyzed using software IE3D V12 to obtain the design parameters of antenna and frequency of these antennas. The third form of radiation pattern of microstrip antenna is directional (directional). Results of simulation of microstrip circular antennas : resonant frequency = 0.8535 GHz, VSWR = 1.046, retrun loss = - 32.89 dB, bandwidth = 1.4167%, the total gain = - 0.673953 dB, HPBW = 170,5110, rectangular microstrip antenna : resonance frequency = 0.849503 GHz, VSWR = 1109, return loss = - 25.7143 dB, bandwidth = 1.4547%, the total gain = - 0.205832 dB, HPBW = 170,6550 and for equilateral triangular microstrip antennas : resonant frequency = 0, 8515 GHz, VSWR = 1115, return loss = -25.28 dB, bandwidth = 1.3055%, the total gain = - 2.32265 dB, HPBW = 170,5710. And on the test results obtained for circular microstrip antennas : resonant frequency = 900MHz, VSWR = 1.03, power received = 0.067 mW, HPBW = 620, rectangular microstrip antennas : resonant frequency = 895MHz, VSWR = 1.04, power received = 0.039 mW, HPBW = 880 and antenna for microstrip equilateral triangle : resonance frequency = 895MHz, VSWR = 1.05, power received = 0.033 mW, HPBW = 690. Keywords: microstrip antenna, substrat materials, antenna parameters, the working frequency antenna
IMPLEMENTASI LAYANAN INSTANT MESSAGING BERBASIS IP MULTIMEDIA SUBSYSTEM MENGGUNAKAN VIRTUAL SERVER Radhian, Fakkar Robbi; Christyono, Yuli; Sukiswo, Sukiswo
Transmisi Vol 16, No 1 (2014): TRANSMISI
Publisher : Departemen Teknik Elektro, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (489.89 KB) | DOI: 10.12777/transmisi.16.1.7-12

Abstract

Abstrak IMS (IP Multimedia Subsystem) didefinisikan oleh 3GPP (3rd Generation Partnership Project) Sebagai subsistem baru yaitu suatu teknologi jaringan  yang memungkinkan pemusatan data, suara, dan gambar melalui suatu infrastruktur berbasis IP. IM(Instant Messaging) adalah teknologi yang memungkinkan para pengguna dalam jaringan untuk mengirimkan pesan singkat secara langsung pada saat yang bersamaan menggunakan teks, gambar, atau pengiriman berkas kepada pengguna lainnya yang sedang terhubung ke jaringan yang sama. Pada tugas akhir ini akan di implementasikan dan dianalisis layanan Instant Messaging berbasis IMS menggunakan virtual server.Dari implementasi ini akan dianalisis dari tinjauan Quality of service yaitu delay, packet loss, jitter dan throughput diharapkan mampu memberikan informasi tentang parameter kelayakan QoS pada jaringan IMS untuk layanan Instant Messaging. Dari hasil pengujian dan analisis dapat diketahui bahwa IMS dapat di implementasikan pada jaringan lokal menggunakan server virtual. Nilai delay, jitter, throughput, dan packet loss sudah sesuai dengan standar dari ITU-T G.1010.Selain itu diketahui pula bahwa kualitas layanan IMS tergantung penggunaan jaringan yang digunakan.   Kata Kunci :IMS, Instant Messaging, dan QoS.     Abstract IMS (IP Multimedia Subsystem) defined by 3GPP (3rd Generation Partnership Project) As the new subsystem is network technology that enables the centralization of data, sound and images via an IPbased infrastructure.IM (Instant Messaging) is a technology that allows the users of the network to send brief messages directly at the same time using text, images or sending files to other users who are connected to the same network. The final project will be implemented and analyzed the IMS-based Instant Messaging service using virtual server. The implementation will be analyzed from the review Quality of service among others his delay, packet loss, jitter and throughput is expected to provide information about the QoS parameters on the network requirements of IMS  for the Instant Messaging service. Testing and analysis of the results can be known that IMS can be implemented on a local network using a virtual server. The value of delay, jitter, packet loss, and throughput is in compliance with the standard of ITU-T G.1010. Additionally note that IMS service quality depends on the use of network load used.   Keyword:IMS, Instant Messaging, and QoS.
ANALISIS PERPINDAHAN KANAL KOMUNIKASI DALAM SATU BSC PADA SISTEM GSM BERDASARKAN DATA DRIVE TEST MENGGUNAKAN TEMS INVESTIGATION 4.1.1 Chalida, Luluk Arifatul; Santoso, Imam; Christyono, Yuli
Transmisi Vol 11, No 4 (2009): TRANSMISI
Publisher : Departemen Teknik Elektro, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (320.413 KB) | DOI: 10.12777/transmisi.11.4.183-192

Abstract

Mobile communications system created to meet the communication needs that can be done anywhere either when user is motionless or moving. To maintain the quality of services in a wide service area, coverage area is divided into smallest geographic units called cells. If the user moves from one area of the cell to another, then it needs an algorithm that guarantees the continuity of communications services. These algorithm is called a handover to a dedicated mode and the cell reselection for idle mode. In observing handoff algorithm, the operator did a drive test using computer and handset, which each had been equipped with special software, and GPS. This research analyze the problems related to the handoff algorithm, both when in idle mode or dedicated mode, including the causes, processes and things that influence it. Data acquisition is carried out through a drive test using software TEMS Investigaions GSM 4.1.1 with routes in the downtown area of Semarang. Drive test held on every Thursday and Sunday for three consecutive weeks starting on August 23, 2009 and each of day divided into three time allocation, ie morning, noon and night. The observed event include: cell reselection, handover, handover (intracell), handover failure and intracell handover failure. In addition Information Element that effected on the event are also observed, path loss criteria and cell reselection criteria for cell reselection, and received power, bit error rate and timing advance for the four other events. From the analysis is known that the assignment channel is triggered by the Information Element value that reaches a certain threshold value. For cell reselection, the both Information Element having equal influence. Information Element of the most influential for the handover and the handover failure is received power, whereas for two other events the most influential is the received bit error. After the detected value of the Information Element reaches a certain threshold, MSC will instruct the candidate cell to monitor and serving mobile station. Different process going on for handover (intracell), which after the information element value is known at a certain threshold, MS will move to another traffic channel in the same cell. If handover (intracell) was requested but could not be performed then handover based quality is tried the next time (if criterion is still given). When this handover also fails then BS toggles back and tries again a handover (intracell). In this drive test result there are 15 handover failures that may because no available traffic channel in candidate cell. There is only once handover intracell failure happened which may be caused by full traffic in candidate channel, but no cell reselection failure is found because this event doesn?t need traffic channel but only signaling channel. Keywords: handover, cell reselection, intracell, IE, TEMS
APLIKASI PENGOLAHAN CITRA DIGITAL UNTUK MENGONTROL SAKLAR BERDASARKAN LETAK DAN WARNA HURUF Totalis, Herry; Christyono, Yuli; Zahra, Ajub Ajulian
Transmisi Vol 12, No 4 (2010): TRANSMISI
Publisher : Departemen Teknik Elektro, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (672.793 KB) | DOI: 10.12777/transmisi.12.4.168-175

Abstract

The use of wireless communication system as a communication medium in control system has been getting popular. Sending information is getting easier with wireless network for example internet. SMS technology has also been used in the house as remote control switch, but there are still many weaknesses including user must know the format of SMS text and have trouble when more and more switches are used. Beside location and condition of the switch in the house is not known directly. Therefore we need a system that can control house?s switch by knowing location and condition directly through pictures.The purpose of this final project research is to design and create a tool that can  control switch remotely using wireless communications with the image display?s position of switch so that we can immediately find out controlled switch . Switch condition is analogue with condition of the  microcontroller pin ATmega8535. In this final project the system is divided into two, namely transmitter and receiver. Transmitter section prepares house plans image data that has been processed and then sent to receiver while receiver interprets image data to determine commands to the microcontroller ATmega8535. Condition of switch can be seen on LED that is connected to microcontroller pin. Based on the test results, it is found that installation image character, changing the color of image character and scanning house plans image in accordance with determined run. Command are sent through serial port properly executed by microcontroller. There?s no error that occur during entire course of the program. In using of ad hoc networks have influencing factors  that is the distance, type of laptops and barrier. Keyword :   transmitter, receiver, house plans image, image character, ad hoc network, serial port,  microcontroller ATmega8535
APLIKASI SISTEM PARKIR DENGAN AUTOMATISASI PEMBIAYAAN BERBASIS RFID (RADIO FREQUENCY IDENTIFICATION) Habsyah, Velayati; Christyono, Yuli; Santoso, Imam
Transmisi Vol 13, No 3 (2011): TRANSMISI
Publisher : Departemen Teknik Elektro, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (310.276 KB) | DOI: 10.12777/transmisi.13.3.108-113

Abstract

RFID ( Radio of Frequency Identification ) is technology base on the this wave radio. Technology able to identify without needed direct contact. RFID developed by in the place of barcode technology. Implementation RFID is among other things used for the approximation of last stream - pass by quickly at turnpike, system of applying of application RFID in that library area, and what is more there are also research RFID used for the university student card, library card and polyclinic card, application of transaction of voucher and fingerprint and breach-block electronic at smart home. In this final project, the writer do the simulation program with automatic park system by using RFID (Radio Frequency Identification).It is expected that using this tool, to help in arranging the park field that using auto identification technology which does not need direct contact in the usage. In this final project, besides making the parking transaction easier, RFID also used as the substitution of money during the transaction. This technology also offers safety. The using of RFID in parking managing gives significant advantages if it is compared with Barcode technology. The design starts with RFID to data input in database and will be used turn on LED like supplementary gate park. Examining process the park transaction include enter transaction park and exit transaction park. In the testing stage, the system can work well and it can be shown by RFID reading not a wrong. The output of this system is identified by LED (Light Emitting Diode) supplementary gate park which creates green color if the system is success and red color if the system cannot be continued. Keyword : Barcode, Identification, LED (Light Emitting Diode) ,RFID (Radio Frequency Identification), park system , tag RFID.
PERANCANGAN MODULATOR DAN DEMODULATOR QUADRATURE PHASE SHIFT KEYING (QPSK) DENGAN RANGKAIAN BALANCE MODULATOR Wibisono, Randi Dwi; Sukiswo, Sukiswo; Christyono, Yuli
Transmisi Vol 16, No 2 (2014): TRANSMISI
Publisher : Departemen Teknik Elektro, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (586.833 KB) | DOI: 10.12777/transmisi.16.2.69-78

Abstract

Abstrak Modulasi QPSK (Quadrature Phase Shift Keying) adalah teknik modulasi digital yang merupakan pengembangan dari modulasi PSK (Phase Shift Keying) dengan memanfaatkan perubahan fasa dari sinyal pembawa.Modulasi QPSK dapat mengkodekan dua bit per simbol yang ditujukan untuk meminimalkan bit eror rate (BER). Pada penelitian ini dirancang perangkat modulator dan demodulator QPSK yang menggunakan rangkaian balance modulator sebagai pencampur sinyal informasi dengan sinyal pembawa. Dengan menggunakan rangkaian balance modulator hanya dibutuhkan sinyal data dan sinyal pembawa sebagai masukannya. Rangkaian balance modulator menghasilkan dua buah sinyal keluaran yang memiliki beda fasa 180o. Sinyal keluaran balance modulator yang masih berupa sinyal BPSK harus dijumlahkan agar didapatkan sinyal QPSK. Sinyal QPSK yang dihasilkan oleh perangkat modulator tersebut dimasukan ke perangkat demodulator untuk mendapatkan kembali sinyal informasi. Dari pengukuran dan pengujian perangkat modulator dan demodulator QPSK dapat diketahui bahwa sistem telah bekerja dengan baik. Hasil pencampuran sinyal data dengan sinyal pembawa menggunakan rangkaian balance modulator menghasilkan sinyal BPSK, akan tetapi bentuk sinyal sinus pada BPSK kurang sempurna. Terdapat waktu tunda antara data masukan pada perangkat modulator dengan data keluaran pada perangkat demodulator sebesar 31,2 us. Waktu tunda ini terjadi karena ada proses penjumlahan sinyal BPSK menjadi sinyal QPSK pada bagian modulator, proses penapisan dan pengkonversian dari data paralel menjadi data serial pada bagian demodulator. Kata Kunci :QPSK, modulator, demodulator, balance modulator     Abstract   QPSK (Quadrature Phase Shift Keying) modulation is a digital modulation technique which is developed from PSK (Phase Shift Keying) modulation by utilizing the phase change of the carrier signal.QPSK modulation can encode two bits per symbol for minimizing the bit error rate (BER). On this research, QPSK modulator and demodulator devices that uses balance modulator circuit as carrier signal and signal information?s mixer were designed.By using balance modulator circuit, it only needs a data signal and carrier signal as an input.Balance modulator circuit generates two output signals which have 180° phase difference. Balance modulator output signal which is still a BPSK signal must be added in order to obtain QPSK signal. QPSK signal generated by the device is inserted into demodulator device to recover information signal. The system has worked well by measuring and testing QPSK modulator and demodulator devices. The results of data signal by mixing the carrier signal using a series of balance modulator generates a BPSK signal, but the shape of BPSK sine signal was not perfect.There is a time delay between the input data on the device with demodulator device output for 31.2 us. Time delay is caused by BPSK signal summation process that becomes the QPSK signal at the modulator, the filtering process and the conversion of parallel data into serial data at demodulator. Keywords :QPSK, modulator, demodulator, balance modulator
KOMPRESI DATA BERDASARKAN PERHITUNGAN DISTRIBUSI PROBABILITAS KEMUNCULAN KARAKTER ORDE DUA DALAM TEKS BAHASA INDONESIA Christyono, Yuli
Transmisi Vol 10, No 1 (2008): TRANSMISI
Publisher : Departemen Teknik Elektro, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (77.997 KB) | DOI: 10.12777/transmisi.10.1.33-37

Abstract

In modern world, the need for capacity  data storage and  electronic data communications channel is important. Capacity storage media and channel communication in electronic data that we use at this time is not unlimited and it is quite expensive.Therefore, we need a method to use electronic data storage and communications resource optimally and efficiently. One effort that can do at this time is to perform data compression. Data will be compressed before store or before send, so that storage capacity of the data after compression is smaller than before and economize time to send data after compression. There are many kind of method which used in data compression.This research will study about the theory of probability, calculate distribution probability of character order two of text in indonesian language, coding based on  Huffman theory, and design software  for data compression.Keywords: sandi, kompresi, penyandian, huffman, lossy, lossles
SIMULASI KENDALI TEKANAN KOMPRESOR PADA ELECTRICALLY ASSISTED TURBOCHARGER DENGAN METODE PI-GAIN SCHEDULING Arsyahadij, Miftahuddin; Setiawan, Iwan; Christyono, Yuli
Transmisi Vol 20, No 2 April (2018): TRANSMISI
Publisher : Departemen Teknik Elektro, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (690.968 KB) | DOI: 10.14710/transmisi.20.2.85-90

Abstract

Mayoritas dari mobil-mobil berpenumpang didesain sehingga memiliki performa yang handal, hemat bahan bakar, dan rendah emisi gas buang. Dalam hal kemampuan sebuah mobil mampu mengatasi berbagai medan jalan yang ada maka performa yang handal menjadi fokus dari pengembangan mobil-mobil saat ini. Beberapa cara untuk meningkatkan performa dari SI engine adalah variasi pemilihan bahan bakar, mengubah rasio kompresi mesin, mengubah nilai air to fuel ratio (AFR), dan menggunakan turbocharger. Turbocharger merupakan salah satu cara yang terbaik. Turbocharger juga memiliki kelemahan apabila diterapkan di SI engine yaitu terjadinya kondisi turbo lag. Penelitian ini merancang sistem kendali yang pada EAT untuk meminimalkan turbo lag pada turbocharger. Metode sistem kendali yang digunakan ada PI-Adaptif. Kendali PI akan mengendalikan agar sistem memiliki respon yang cepat dan stabil. Kendali adaptif akan mengatasi parameter atau variabel sistem yang berubah berdasarkan waktu (time varying).
Co-Authors Abdul Syakur Achmad Hidayatno Adam, Nur Muhammad Adhe Setya Nugraha Adi Dhama Kameswara Adian Fatchur Rochim Aghus Sofwan Ajub Ajulian Zahra Akbar Satria Wardhana, Akbar Satria Amin Taufiq Anang Setiaji, Anang Anggie Salsa Saputra Anton Prabowo Arismunandar, Ridho Arsyahadij, Miftahuddin Aulia Latifah Insan Firdausi Azizah, Mega Tiara Nur Budi Setiawan Budi Setiyono Cosa Pamungkas Prabaswara Dania Eridani Darjat Darjat Dayanti, Jessy Kris Defriko Christian Dewandhika Denny Ardyanto Dewi Lestari Faizin, Ahmad Arif Fakkar Robbi Radhian Faruq, Faishal Al Fendy Yulian Rakhmad Hafidz Erwin Kurniawan Hermawan, H Herry Totalis Ibnu Fauzan Al Aula Imam Santoso Irwan Budiman Iwan Setiawan Jannah, Lulu Maftukhatul Karyadi, Atma Kodrat Iman S, Kodrat Iman Kodrat Iman Satoto Luluk Arifatul Chalida Luthfi Rahman, Luthfi M. Hidayat Al Rizqy Maman Soemantri, Maman Maman Somantri Mita Indriani Mochamad Arif Haryadi, Mochamad Arif Mohamad Adiwijaya, Mohamad Muhammad Arfan Muhammad Fatkhur Rahman, Muhammad Fatkhur Munawar Agus Riyadi Murianda, Baron Ngatelan Ngatelan Nugraha, Satria Indra Nugroho, Bima Adhi Nugroho, Gilang Cahyo Nunditya, Devina Mirza Nurtsani, Afin M P, Eskania Widya Putut Suharso R. Rizal Isnanto Rahmat Dwi Cahyo, Rahmat Dwi Rahmat Juniar Dwiansyah Raidah Hanifah Ramada, Raynaldi Surya Randi Dwi Wibisono Rizal Yunan Rifai, Rizal Yunan Satriadi, Arifaldy Setiawan, Hadyan Setyo Suseno, Setyo Shulchul Chabib Achmad Sudjadi Sudjadi Sukiswo Sukiswo Sumardi Sumardi Surya Purba Wijaya Sutaryono, Agus Tanzila Azizi Rochim, Tanzila Azizi Teguh Prakoso Toni Prahasto Tri Handayani Trias Andromeda Velayati Habsyah Wahyudi Wahyudi Windarta, Jaka Wiratama, Radhitya Wiratama, Radhitya Yoga Krismawardana Yunianto Panji Nugroho, Yunianto Panji