TRANSMISI
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IMPLEMENTASI DEKODER MIMO BERBASIS DETEKSI SPHERE PADA WLAN 802.11n Setyadewa, Anky; Syafei, Wahyul Amien; Santoso, Imam
TRANSMISI Vol 14, No 3 (2012): TRANSMISI
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Abstrak Wireless LAN adalah suatu teknologi nirkabel yang berbasis OFDM (Orthogonal Frequency Division Multiplexing) dan MIMO (Mutiple Input Multiple Output) yang dapat digunakan untuk komunikasi data. Peningkatan permintaan pengguna sistem Wireless LAN juga menyebabkan peningkatan pengembangan Wireless LAN. Standard dari Wireless LAN adalah IEEE802.11a/b/g dan IEEE802.11n yang menggunakan teknik OFDM dan MIMO untuk meningkatan laju data tanpa memerlukan tambahan bandwidth. Tujuan dari paper ini adalah untuk mengimplementasikan algoritma deteksi Sphere pada simulator WLAN 802.11n pada bagian MIMO blok decoder. Parameter yang diamati adalah nilai BER vs SNR (signal to Noise Ratio). Hasil yang diharapakan adalah kinerja yang lebih baik dibandingkan dengan algoritma deteksi linear (MMSE, ZF) dan algoritma deteksi optimal, MLD. Pada MCS 13 untuk nilai BER 10-4, hasil simulasi menunjukkan bahwa metode ZF, MMSE, MLD dan SD mencapainya pada SNR 44 dB, 42 dB, 31 dB dan 33 dB. Sedangkan pada MCS 14, keempat metode mencapai nilai BER 10-4 pada SNR 46 dB, 44 dB, 31 dB dan 33 dB. Dan pada MCS 15 akan mencapai nilai BER 10-4 pada SNR 55 dB, 53 dB, 36,5 dB dan 39,5 dB. Dibandingkan dengan MLD, algoritma deteksi Sphere akan bernilai lebih besar tetapi dengan kompleksitas yang lebih sedikit. Kata Kunci : WLAN 802.11n, MIMO, OFDM, decoding, Sphere Detektor, BER
Perancangan Sistem Kontrol Genetic-Fuzzy: Studi Kasus Pada Pengendalian Top And Side End Point Composition Dan Bottom Reflukstemperature Pada Distillation Column Safitri, Meilia; Triwiyatno, Aris; Wahyudi, Wahyudi
TRANSMISI Vol 14, No 3 (2012): TRANSMISI
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Genetic-Fuzzy Control is one of the control technique which is use to solve the non-linear problems by combinating two control methods, Fuzzy Logic Controller and Genetic Algorithm. Genetic algorithm is use to overcome the difficulties in determining the membership function parameter that can optimally work on Fuzzy Logic Controller. In this paper Genetic-Fuzzy control is used to control Shell Heavy Oil Fractionator which is mulvariable system with 3 input and 3 output. Decoupling have the function to reduce interaction between input and output that are not paired. Keyword : Genetic-Fuzzy control, distillation column, decoupling, MATLAB Simulink, Multivariable system
Pemodelan Dan Simulasi Motor Dc Dengan Kendali Model Predictive Control (MPC) Sinuraya, Enda Wista
TRANSMISI Vol 14, No 3 (2012): TRANSMISI
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Motors are devices that convert electrical energy into mechanical energy. The D.C. motors that runs on direct current (DC) electricity convert electrical energy into rotational energy. That rotational energy is then used to lift things, propel things, turn things, etc. the implementation model predictive control for controlling a D.C motor can change system’s output before setpoint be changed. Keyword: D.C Motor, model predictive control (MPC), setpoint
Aplikasi Pengolahan Citra Untuk Identifikasi Produk Berdasarkan Label Kemasannya Sudjadi, Sudjadi; Somantri, Maman; Yudanto, Scifo Anggi; Prasetyo, Hanung
TRANSMISI Vol 14, No 3 (2012): TRANSMISI
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The development of information technology today is growing very fast. The software not only required in running a fast execution but also efficient in the utilization of network bandwidth so that traffic does not become heavy. With the swift network-based computing devices into everyday life, the higher the demand to take advantage of technology agent in the process of problem solving based mobility. This study purpose to implement technology on a mobile Agent software with a case study of a software used to perform a book search on multiple database servers. In software, the agent will move from one database server to another server database to find books that sought out and returned to the client computer and show the results obtained. In this research using Aglet 2.0.2 as the software used for build of such applications. Aglet is used to develop agents who will move from one computer to another computer. To view the search results using PHP and HTML language. Based on the results of tests have been done, the conclusion that application could be implemented by the method of Mobile Agents. Mobile Agents used consists of three kind of AgentOne which serves to make AgentTwo and send it to computer database server, AgentTwo which serves to find the books what are looking for and make AgentThree, and AgentThree which serves to bring the results and go back to the client computer. These three agents formed a collaboration of good programs so the system book search can work as expected. Keywords : Agent, Mobile Agent, Aglets, Book Searching
PEMODELAN DAN SIMULASI ROLL, PITCHDANYAW PADA QUADROTOR Saputra, Oka Danil; Triwiyatno, Aris; Setiyono, Budi
TRANSMISI Vol 14, No 4 (2012): TRANSMISI
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Abstrak Penelitian ini fokus membahas tentang pengaruh input Roll, Pitch dan Yaw pada Quadrotor. Metode Euler-Newton digunakan untuk memodelkan persamaan dinamika Quadrotor. Pengujian pemodelan dilakukan dengan menggunakan program matlab simulink. Dari hasil perhitungan, diperoleh nilai parameter dinamika yaitu massa Quadrotor m =1,2 [Kg], momen inersia pada sumbu x IXX = 8,3 × 10-3 [N.m.s2], momen inersia pada sumbu y IYY = 8,8 × 10-3 [N.m.s2], momen inersia pada sumbu z IZZ = 15,5 × 10-3 [N.m.s2], jarak pusat Quadrotor dengan pusat baling-baling l =230 ×10-3 [m], momen inersia total sekitar sumbut motor JTP = 2,3 × 10-5 [N.m.s2], konstanta elektrik motor KE = 5,8 × 10-3 [V.s/rad] dan hambatan motor R = 41,2 × 10-3 [Ω]. Dari hasil simulasi, disimpulkan bahwa nilai output sudut (phi) ditentukan oleh nilai inputRoll, nilai output sudut (theta) ditentukan oleh nilai inputPitch dan nilai output sudut (psi) ditentukan oleh nilai input Yaw. Kata kunci: Quadrotor,Roll, Pitch, Yaw Abstract This research work focused on the study of Roll, Pitch and Yaw (Input) a Quadrotor. The Euler-Newton formalism was used to model the dynamic system. The Matlab Simulink program was developed to test the result. From the calculation result, the value of dynamic parameter were consisting mass of the Quadrotor m =1,2[Kg], body moment of inertia around the x-axis IXX = 8,3 × 10-3 [N.m.s2], body moment of inertia around the y-axis IYY = 8,8 × 10-3 [N.m.s2], body moment of inertia around the z-axis IZZ = 15,5 × 10-3 [N. m .s2], length center of propeller from center of Quadrotor l = 230 × 10-3 [m], total rotational moment of inertia around the propeller axis JTP= 2,3 × 10-5 [N.m.s2], electric motor constant KE = 5,8 × 10-3 [V.s/rad] and motor resistance R = 41,2 × 10-3 [Ω]. From the simulation result, it can be concluded that the (phi) angle was determined the Roll input, the (theta) angle was determined the Pitch input and the (psi) angle was determined the Yaw input. Keywords: Quadrotor,Roll, Pitch, Yaw
KONVBRTER AC-AC SATU FASA BERBASIS MIKROKONTROLLER Handoko, Susatyo; Nugroho, Agung
TRANSMISI Vol 9, No 2 (2007): TRANSMISI
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Abstrak : Konverter ac-ac merupakan rangkaian yang dapat menghasilkan tegangan keluaran ac variabel dari sumber ac tetap. Jika sebuah saklar semikonduktor dihubungkan antara sumber ac dan beban, alirar energi dapat dikontrol oleh variasi nilai rms dari tegangan ac yang dipakai oleh beban. Penelitian ini membdhas tentang konverter ac-ac satu fasa dengan menggunakan triac serta memanfaatkan mikrokontroller sebagai.penghasil pulsa pemicuannya. Pengujian modul konverter ini dilakukan untuk memperoleh tegangan keluaran AC variabel. Kata kunci : mikrokontroller. konverter AC-AC
PEMANFAATAN LAYANAN SMS PADA PONSEL UNTUK APLIKASI E-MAIL Utomo, Pringgo Budi; Zahra, Ajub Ajulian; Isnanto, R. Rizal
TRANSMISI Vol 14, No 3 (2012): TRANSMISI
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Abstract The development of technology has replaced manual system into automation system. In telecommunications sector, there is an e-mail (electronics mail) that replaces the common letter which is previously sent through the Post Office. The use of e-mail is more effective because it is more faster. Today Internet users are getting increasingly so the Internet connection becomes slow. For a fast Internet connection requires a payment that is relatively expensive to internet service providers, so that the process of sending and receiving e-mail in any time or in realtime is quite difficult. Based on the fact above, this research was done to develop an application that utilizes short message service on a phone that is used for e-mail applications. This application runs on a computer that functions as a server. A modem ,that is connected to a server, is used for the process of receiving and sending SMS to the destination mobile number. Internet connection using a LAN internet connection to get stablity and fast internet connection. Mobile phones sending e-mail just by sending SMS that accordances with the format to the server, then the server will upload the contents of that SMS to e-mail destination. When there is incoming e-mail at the registered e-mail account in the system, automatically e-mail content will be downloaded by the system and will send to the account e-mail owner´s phone number. The process of sending and receiving e-mail on phone is done by using the short message service, because Internet connection process only occurs on the server. From the test results, it is obtained that average delay result is at least 33.1 seconds for delivering more than 600 characters. Sending an e-mail from phone to gmail.com is 10 seconds, faster than shipments to yahoo.co.id (14.6 seconds). From these test results concluded that the use of different mobile number does not affect the sending and receiving SMS between users and systems, as well as SMS messages to the inbox system will not be processed if the wrong SMS format and not from registered users. Keywords: E-mail, SMS, Internet, phone cellular
PENGENDALIAN pH AIR DENGAN METODE PID PADA MODEL TAMBAK UDANG Kristianto, Andrian; Setiawan, Iwan; Sumardi, Sumardi
TRANSMISI Vol 14, No 4 (2012): TRANSMISI
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Abstrak Luas wilayah perairan yang cukup besar Indonesia memiliki potensi dalam pengembangan dan budidaya hasil perikanan seperti udang, namun banyaknya petambak udang yang gagal panen karena perubahan cuaca yang tak menentu ini mengakibatkan buruknya kondisi air tambak sehingga menyebabkan banyak udang yang mati. Pengaruh keadaan air memang sangat penting karena ada beberapa parameter air yang berpengaruh pada udang seperti suhu air, kadar oksigen, pH, dan salinitas. Parameter tersebut perlu dijaga kestabilannya untuk kelangsungan hidup udang. Pengendalian pH air dengan metode PID Ziegler Nichols I ini dilakukan pencarian parameter kontroller pada beban tertentu dengan menggunakan metode bumptest untuk mendapatkan parameter L (keterlambatan), T (time konstan), dan K (gain) sehingga didapat nilai Kp, Ki, dan Kd. Metode PID Ziegler Nichols I hasil penelitian mengahsilkan nilai Kp= 175, Ki= 40, dan Kd= 10 dari nilai parameter L= 20 sekon, T= 71 sekon dan K= 0,0243 pH/%. Dari hasil pengujian metode PID Ziegler Nichols I dirasa cukup efektif dalam mengatasi gangguan dari beberapa hasil pengujian dengan gangguan berupa larutan asam dengan pH sebesar 3,80 dan 4,08 didapatkan error steady 5% sedangkan untuk gangguan berupa larutan asam dengan pH sebesar 5,03 error steady 4%. Kata kunci :Kontrol PID (Proporsional-Integral-Derivative), Pengontrolan pH air, Sensor pH.
ANALISIS TRANSFORMASI BALIK CITRA IRIS MENGGUNAKAN WAVELET HAAR BERDASARKAN FAKTOR RETENSI KOEFISIEN WAVELET Wicaksono, Agung; Isnanto, R. Rizal; Hidayatno, Achmad
TRANSMISI Vol 14, No 4 (2012): TRANSMISI
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Abstract Wavelet is one method that can be used as a step to recognition an individual. Wavelet is used to perform an image feature extraction. In the process of image texture analysis, showed the value of the coefficients of a wavelet. The magnitude of the coefficients obtained using wavelet feature extraction is influenced by several factors. Besides affected by the type of wavelet used, is also influenced by the magnitude of the wavelet decomposition level of itself. In the wavelet is known as the wavelet energy retention, which means the number of retained energy after undergoing a process of decomposition and cutting coefficients. During the decomposition process, the calculation for texture analysis is often a constraint. In order for the current calculation lighter texture analysis, necessary to the process of cutting coefficients based on the retention factor of the wavelet coefficients. Based on these issues, created a program to analyze the influence of variations in the level of wavelet decomposition and coefficient of variation coefficient of cutting a cut on the image. The object of this final project is 30 iris image that has been converted into polar form presented. Having experienced the process of cutting coefficients, to prevent the image of the reverse transformation has a big difference to the original image, in this study was calculated Mean Square Error (MSE), Peak Signal to Noise Ratio (PSNR), and Euclidean distance to determine the level of similarity of image input and output images. The Highest values of Retention​, MSE and the Euclidean distance is obtained at the level of decomposition of 1 and the lowest at the level of decomposition 6. While the truncated coefficient and PSNR values ​​obtained at the highest level of decomposition of 6 and the lowest level of decomposition of 6. The variation coefficient of pieces, value retention and highest PSNR obtained at koefsien piece 5 and the lowest coefficient of 50 pieces. While the coefficient value is truncated, MSE and the highest Euclidean distance is obtained at koefsien pieces 50 and the lowest coefficient of 5 pieces. Keywords: iris, texture analysis, Haar wavelet transform, MSE, PSNR, Euclidean distance
ANALISA PENGARUH KONTAMINAN PANTAI TERHADAP UNJUK KERJA SAMPEL ISOLATOR BAHAN KERAMIK SEBELUM DAN SESUDAH DILAPISI MINYAK SILIKON Ashari, Anhar; Syakur, Abdul; Winardi, Bambang
TRANSMISI Vol 14, No 4 (2012): TRANSMISI
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Abstrak Sampai dengan saat ini, isolator yang paling banyak digunakan adalah dengan menggunakan bahan keramik. Kelemahan bahan isolator keramik ini, terutama pada bagian permukaannya yang bersifat mudah dibasahi oleh air. Kondisi ini sangat mendukung untuk terbentuknya kristal konduktif pada pemukaan bahan isolator bahan keramik, terutama disebabkan oleh kontaminan garam yang dibawa angin pada saat terjadi penguapan saat siang hari. Jika kontaminan ini dibiarkan terus, maka jalur konduktif ini akan menyebabkan arus bocor. Oleh karena itu diperlukan suatu tindakan, agar permukaan bahan isolator keramik ini bisa lebih bersifat menolak air (hidropobik). Dengan demikian permukaan tidak mudah terbasahi oleh air. Penelitian ini dilakukan untuk mengetahui pengaruh kontaminan pantai terhadap sampel isolator keramik dan pengaruh minyak silikon sebelum dan sesudah dilapiskan pada sampel isolator . Sistem pengukuran dan pengujian mengacu pada standar IEC 587 untuk mengetahui karakteristik isolator sebelum dan sesudah diberi lapisan minyak silikon, Karakteristik tersebut meliputi waktu flashover pertama, sudut kontak dan arus bocor. Hasil dari Pengujian menunjukkan bahwa Minyak Silikon terbukti dapat meningkatkan sudut kontak dari sampel uji. Sampel uji sebelum dilapisi minyak silikon mempunyai sudut kontak rata-rata sebesar 43,74o sedangkan sampel yang sudah dilpaisi minyak silikon mempunyai sudut kontak rata-rata sebesar 84,05o. Waktu terjadinya flashover pertama kali pada sampel sebelum diberi minyak silikon dengan dialiri polutan pantai cenderung singkat dengan waktu terlama adalah 351 detik. Sedangkan Untuk waktu terjadinya flashover setelah dilapisi minyak silikon dengan dialiri polutan pantai dengan waktu terlama adalah 11645 detik. Kata kunci :Minyak Silikon, Sudut Kontak, Sampel Isolator Keramik, IEC 587

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