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Rancang Bangun Sistem Spread-Spectrum dan Simulasi Kanal Multipath dengan Menggunakan PN Gold Code
No full textPenelitian ini dilakukan rancang bangun simulator kanal multipath dan sistem spread spectrum berbasis Field Programmable Gate Array, sebagai kode acak semu dipilih jenis kode Gold. Untuk melihat kinerja sistem tersebut dilakukan uji coba dan pengukuran hasil terhadap pengaturan pen-delay-an pada lintasan jamaknya. Dari hasil penelitian yang dilakukan dikanal multipath sifat kanal frekwensi selektif muncul saat rms delay spreadnya 215,723 nS, dengan time symbol 125 nS, perbedaan yang agak jauh dikarenakan keterbatasan pembuatan delay dalam skala kecil. Modul penelitian yang dibuat dapat digunakan sebagai simulator secara hardware dimana untuk melihat sinyal-sinyal spreading-despreading, sinyal-sinyal PN serta simulasi sederhana kanal multipath
Perancangan dan Pembuatan CMS Tryout Online pada Dinas Pendidikan dengan Menggunakan Database Terdistribusi
No full textKita menyadari bahwa kualitas, sarana dan prasarana pendidikan di Indonesia masih terbatas. terlebih lagi kondisi demografis Indonesia yang merupakan kendala dalam proses pemerataan mutu pendidikan. Salah satu cara yang bisa digunakan untuk mengatasi masalah diatas yaitu dengan pembuatan aplikasi yang dapat membantu pembelajaran secara mandiri dan murah, yang sesuai dengan kebutuhan, yaitu CMS (Content Management System) TryOut Online yang sesuai dengan kegiatan nyata (tryout konvensional). Untuk mengatasi masalah kecepatan dan keamanan data pada saat pelaksanaan tryout dapat digunakan dengan menerapkan sistem database terdistribusi. Aplikasi ini mampu menyediakan layanan tryout secara online dengan beberapa pilihan tampilan random pada soal yang dapat mengurangi tingkat kecurangan pada saat mengerjakan ujian. Dan dengan menggunakan database terdistribusi, data yang ada pada database dinas pendidikan pusat akan otomatis mereplikasikan diri pada sub-server yang lain
Penerapan Teknologi Wireless RF Dan SMS Gateway pada Sistem Monitoring Pemakaian Air PDAM Skala Rumah Tangga yang Terintegrasi Database via Internet
No full textSistem pencatatan watermeter PDAM yang ada di Indonesia umumnya masih menggunakan sistem yang konvensional yaitu pencatatan watermeter dari rumah ke rumah atau menggunakan alat yang dinamakan handheld yang dilengkapi dengan barcode. Kelemahan utama dari sistem tsb adalah jika tidak ada orang di rumah dan pintu rumah dikunci, pencatat watermeter tidak dapat melakukan pencatatan watermeter, umumnya kemudian dilakukan sistem tembak atau mengira-ira. Sistem komunikasi yang diterapkan mampu mendukung proses pengambilan data pemakaian air oleh server melalui mikroserver dengan tingkat keberhasilan 95% untuk pihak server. Proses komunikasi data menggunakan baud rate 9600. Pemanfaatan metode enkripsi data type Caesar Chipper , pengecekan FCS dan mode pengalamatan 16 bit pada wireless RF mampu menjaga kekuratan dan keamanan data pada saat transmisi data. Penerapan teknologi SMS Gateway pada sistem komunikasi untuk monitoring pemakaian air PDAM skala rumah tangga ini memungkinkan untuk pengiriman data ke server untuk jarak komunikasi yang relatif jauh. Kata kunci— : wireless RF, enkripsi, singlehop, SMS Gateway, mikroserver, serve
SEGMENTASI TULANG PADA CITRA CT MENGGUNAKAN ACTIVE CONTOUR
No full textABSTRAK Tingginya tingkat kecelakaan lalu lintas dan bencana di Indonesia berakibat pada banyaknya korban yang mengalami kerusakan struktur tulang, patah tulang ataupun keretakan pada tulang. Tindakan rehabilitasi medis bisa dilakukan dengan menggunakan prostesis atau implan. Selama ini ketergantungan terhadap pihak luar sangat tinggi karena sebagian besar prostesis merupakan produk impor, dan harganya cukup mahal. Akibatnya pasien dari kalangan ekonomi rendah merasa terbebani bahkan tidak bisa mendapatkan layanan tersebut. Selain itu, prostesis ini tidak cocok dari segi ukuran karena pasien Indonesia mempunyai dimensi tulang yang berbeda. Oleh karena itu, pembuatan prostesis Indonesia yang dibuat berdasar anatomi dan fisiologi orang Indonesia sangat diperlukan. Untuk mendukung hal tersebut diperlukan data tentang dimensi umum tulang orang Indonesia. Penelitian ini bertujuan untuk mendapatkan dimensi tersebut dengan melakukan segmentasi tulang orang indonesia, kususnya tulang yang mengalami kerusakan. Untuk mendapatkan dimensi sebuah tulang diperlukan proses segmentasi tulang dari citra medis. Masukan proses segmentasi ini adalah citra medis yang berasal dari CT (Computed Tomography), karena struktur tulang yang terlihat pada citra CT lebih jelas. Metode segmentasi yang dipilih adalah metode dari kelompok deformable model/active contour yaitu level set, karena metode ini cocok untuk segmentasi objek bentuk bebas (free-form object). Penelitian dilakukan pada citra CT tulang iliac, sebanyak 90 slice. Untuk menguji kinerja dari metode yang diusulkan, hasil segmentasi level set dibandingkan dengan segmentasi manual, dan diperoleh hasil bahwa dengan menggunakan metode level set, segmentasi yang dihasilkan mempunyai nilai rata-rata sensitifitas 96,806%, akurasi 99,809% dan spesifitas 99,981%. Kata kunci : prostesis, citra CT, active contour, level se
RANCANG BANGUN SUPERVISORY CONTROL AND DATA ACQUISITION (SCADA) PADA PENGENDAP KEDUA (CLARIFIER) UNTUK PROSES POLYELECTROLYTE FEEDER DI PDAM KARANGPILANG I SURABAYA
No full textControl system has developed by Supervisory Control And Data Acquisition (SCADA) which base of PLC could be implemented for a few of final projects that concern to this paper has discuss the implementation of polyelectrolyte feeder process on second precipation reservoir (clarifier) which is made as a simulation from the industrial process in particular for PDAM Karangpilang I. Refer to adding of polyelectrolyte feeder process it depends on engineer so that near by an object, it means to be necessary monitoring system and controlling come outside it controlled. So then making a SCADA system it combined with baseline of PID. Where of all after identification test of an object, value of PID parameters which is Kp is 5, Ti is 1.2, and Td is 0.3 which of base calculate theory and it implementation for PID on SCADA within PLC. For value of it parameters with setpoint level of 50 or read of 2 volt and present value level of 73 or read of 2,7 volt, where time is needed to reach a steady state is 12,2 sec. From all of system is done, this system is depend on tuning of PID parameters and choices of object
Rancang Bangun SImulasi SPBU Mandiri Menggunakan Air dengan Sistem Prabayar Berbasis Smartcard
No full textGas Station is a place where people can fill their vehicle such as gasoline, diesel, or pertamax. As we know the transaction at the gas station system still uses a conventional manner. Beside that, these facilities are not widely available, especially in remote places. In this final project had been designed self-supportingly SPBU . Payment system using contactless smartcard type. To read smartcard in data procesing, this project using ACR 120S. That card reader isconected in series wth minimum system microcontroller which then enabled to transmit and receive and process data from input. To operate the tool, at the first smartcard wich already contain the necesasary data, is inserted into the card reader. Data will be received and processed by the microcontroller, then the transaction can be done through the keypad up to maximum pulse wich owned. Process transactons through the LCD display. Furthermore, the Micorocontroller generating pump so the pump can remove the liquid in accordance with the transaction. After conducted by the system examination of at this final project got the advantage and weakness of the system however have been opened previously that this system is applicable even development. On testing hardware and software, the final project of independent station can perform purchase transactions amounting to 7000 to the counter 144 which produces 1.55 liters of liquid and 9000 rupiah to the counter 186 which produces 2.0 liters
OPTIMASI PEMILIHAN PAKET AUDIO MOBIL MENGGUNAKAN METODE SIMULATED ANNEALING BERBASIS CTI
No full textNowdays, people need a practical to buy an equipment. It�s because many of them feel confuse to fit their budget with the equipment feature they like. By website, the consumer will easily to get information from the items to be purchased. On this final project made a system which is make easier consumer to choose the car audio packet. By simulated annelling method, the consumer can be used the optimation process for choosing some item and controlling budget to buy car audio packet based on feature, brand, and price. In this system, interface and consumer access connected by website full with the catalog which is in database which integrated with IVR Server. In this system can simplify the optimization process choosing car audio packet based on budget and facility desired without place and time restrictions. The optimization process with simulated anneling method have a quality to give advice with budget or price parameter which has been input by consumer and can be accessed by 4 user in the same time. Keywords: Simulated Annealing, IVR, Web Server, Database
RANCANG BANGUN CHARGER BATERAI DENGAN BUCKBOOST KONVERTER
No full textBattery is one of the media for power supplies in electronic devices. However, the battery�s ability supplied power limited on how big the capacity that is stored in batteries. When the battery charge runs out, it needs re-charging (charge), where the device to recharge the battery charge must consider several aspects such as charging current, battery voltage and when the charging process must be stopped, this is considering that batteries for electric bicycles 3x12V/12 ah has a maximum current limit charging 3 A, and with charger in the sales package, not allowed to charge more than five hours. The fact is, many owners of electric bicycles do excessive charging so the battery does not last long. The solution to this problem is to use battery charger, which can be used to charge the battery charge to some voltage rating (12V and 24 V). This battery charger is equipped with buckboost converter for voltage and charging current regulator which way this works is based on the large PWM duty cycle generated by the microcontrolle
Visualisasi Propagasi Gelombang Indoor Pada Wi-Fi 2,4 GHz
No full textWi-Fi network and the device worked on a wireless communication system (wireless communication system), eg a WLAN network. The most important part in wireless communications was the wave propagation. The course of wave propagation from the transmitter (Tx) to receiver (Rx), which indicated the power level of signals received were invisible, hence the need for visualization. In this final project was created visualization propagation path of electromagnetic wave propagation in an enclosed space (indoor) from the Wi-Fi with a frequency of 2.4 GHz based on the power level measurement data propagation in space in the new building PENS-ITS. In the measurement there were other parameters were observed between the received power level, the magnitude of angles, distances were measured, and the transmitter to the receiver antenna height. The propagation paths studied were Line of Sight (LOS) and Non Line Of Sight (NLOS). From the measurements it was known that, the farther the distance to the transmitter and the receiver the received power level were smaller and were influenced by environmental conditions that exist. This final project has produced a visualization program of electromagnetic wave propagation at 2.4 GHz indoor propagation using 2D ray tracing method in the Java 2SE. Keywords: Wi-Fi Signal Power Level, Ray Tracing, Java 2 S
ANALlSA KINERJA MODULASI GAUSSIAN MINIMUM SHIFT KEYING BERBASIS PERANGKAT LUNAK
No full textIn a wireless communication system bandwidth on the spectrum efficiency of radio frequency (RF) Limited, this is a demands considerable importance. In an effort to meet these demands, then applied the method of filtering digital data signal prior to modulation. GMSK Gaussian Minimum Shift Keying or is the development of MSK, the technique eliminates sidelobe spectrum with NRZ signal by passing the Gaussian filter LPF. In this final project, analyzed how the performance of a GMSK modulator through simulations using the software CppSim and observation of the output signal. Keywords: GMSK Modulation, Frequency Carier, Gaussian filter LPF