Rusdha Muharar, Rusdha
Magister Teknik Elektro Universitas Syiah Kuala

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KLASIFIKASI OTOMATIS MOTIF TEKSTIL MENGGUNAKAN SUPPORT VECTOR MACHINE MULTI KELAS Ramadhani, Ramadhani; Arnia, Fitri; Muharar, Rusdha
Jurnal Teknologi Informasi dan Ilmu Komputer Vol 7, No 1: Februari 2020
Publisher : Fakultas Ilmu Komputer, Universitas Brawijaya

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Abstract

Tekstur merupakan pola atau motif tertentu yang tersusun secara berulang-ulang pada citra. Tekstur mudah dikenali/dikelompokkan oleh manusia, tetapi sulit bagi mesin. Klasifikasi tekstur secara otomatis berguna dan dibutuhkan pada banyak bidang seperti industri tekstil, pendaratan pesawat otomatis, fotografi dan seni. Pada industri tekstil, klasifikasi tekstur otomatis dapat meningkatkan efisiensi proses desain motif. Motif tekstil terdiri dari banyak kelompok, sehingga diperlukan metode klasifikasi multi kelas untuk mengelompokkan motif-motif tersebut. Artikel ini memaparkan kinerja tiga metode Support Vector Machine (SVM) multi kelas: One Against One (OAO), Directed Acyclic Graph (DAG) dan One Against All (OAA) pada klasifikasi motif dari citra tekstil, dimana Wavelet Gabor digunakan sebagai pengekstraksi fitur. Kinerja SVM diukur berdasarkan parameter akurasi dan fitur Gabor diekstraksi dengan skala dan orientasi yang berbeda. Tujuan penelitian ini adalah menentukan kinerja SVM dan pengaruh jumlah skala dan orientasi Gabor yang digunakan pada klasifikasi motif tekstil. Pada simulasi digunakan 120 citra tekstil yang terbagi menjadi tiga kategori motif: bunga, kotak dan polkadot. Akurasi pengelompokan SVM mencapai kisaran 90%-100%, bahkan untuk citra yang terpotong. Pengujian dengan k-fold validation menunjukkan bahwa SVM DAG lebih baik daripada SVM OAO dan SVM OAA, dengan akurasi mencapai 78%. AbstractTexture is a repetition of a specific pattern concatenation in an image. The Texture can be defined as a repetition of pattern in an image.  The texture is easy for the human to classify, but it is not easy for a machine. Automatic texture classification is useful and required in many fields such as textile industry, automatic aircraft landing, photography and art. In the textile industry, automatic texture classification can enhance the efficiency of motif designing process. The textile motif is various and should be grouped into more than two classes; therefore a multiclass classification is required. This article discusses the performance of multiclass Support Vector Machine (SVM): One Against One (OAO), Directed Acyclic Graph (DAG) and One Against All (OAA) in classifying textile motifs, in which the Gabor Filter was used to extract the texture features. The SVM performance was measured in terms of accuracy, while the Gabor features were extracted in a different combination of scales and orientations. The purpose of the work is to measure the SVM performance and determine the effect of using various Gabor scales and orientations in textile motifs classification. We used 120 textile images with three motifs: flower, boxes and polka dot. The SVM accuracy of 90%-100% was achieved; even for cropped textile images. Using the k-fold validation, the accuracy of SVM DAG was 78%, higher than those of SVM OAO and SVM OAA
ANALISI KINERJA JARINGAN KOOPERATIF MULTI-HOP RELAY BERBASIS PROTOKOL AMPLIFY-QUANTIZE AND FORWARD (AQF) Alfian, Alfian; Nasaruddin, Nasaruddin; Muharar, Rusdha
Jurnal Karya Ilmiah Teknik Elektro Vol 1, No 1 (2016)
Publisher : Universitas Syiah Kuala

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Abstract

Dokumen Kinerja jaringan komunikasi nirkabel dapat menurun akibat adanya gangguan sinyal informasi yang disebabkan oleh fading dan noise. Fading ini dapat dikurangi dengan menerapkan sistem jaringan relay kooperatif. Jaringan relay kooperatif yang digunakan pada penelitian ini adalah jaringan kooperatif multi-hop relay dengan protokol AmplifyQuantize-and-Forward (AQF). Protokol AQF bekerja berdasarkan penguatan dan kuantisasi sinyal-sinyal yang lemah akibat gangguan fading dan noise pada relay sebelum diterima pada tujuan. Pada penelitian ini dilakukan; (1) analisis kinerja jaringan kooperatif multi-hop relay menggunakan protokol AQF; (2) analisis Bit Error Rate dan throughput terhadap pengaruh banyaknya jumlah hop relay; (3) perbandingan kinerja antara jaringan kooperatif multi-hop relay dengan protokol AQF dan jaringan kooperatif dengan protokol AF dan QF. Dalam analisis penelitian, faktor jarak antara sumber, relay dan tujuan tidak diperhitungkan. Hasil analisis menunjukkan sistem jaringan kooperatif multi-hop dengan dua hop menggunakan protokol AQF memiliki kinerja lebih baik dibandingkan dengan sistem jaringan kooperatif multi-hop dengan 3 hop dan 4 hop dengan protokol yang sama, dimana nilai Bit Error Rate tinggi dan throughput yang dihasilkan rendah. Begitu juga untuk sistem jaringan kooperatif multi-hop relay dengan 3 hop menggunakan protokol AF, AQF dan QF, disini nilai Bit Error Rate dan throughput pada sistem jaringan mengunakan protokol AF lebih baik dari protokol AQF dan QF, sedangkan protokol AQF lebih baik dibandingkan menggunakan protokol QF.  Kata Kunci ?  Jaringan kooperatif, multi-hop relay, AQF, bit error rate dan throughput
Penghematan Daya pada Sistem Komunikasi Kooperatif Two-Way dengan Pengaturan Rasio Data Rate Nasaruddin, Nasaruddin; Rahmadi, Didi; Muharar, Rusdha
Jurnal Nasional Teknik Elektro dan Teknologi Informasi (JNTETI) Vol 7, No 2 (2018)
Publisher : Jurusan Teknik Elektro dan Teknologi Informasi, Fakultas Teknik, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1105.825 KB) | DOI: 10.22146/jnteti.v7i2.422

Abstract

Currently, many communication technologies use wireless media because it can provide seamless connectivity and mobile access. In the implementation, wireless communication system faces many challenges, one of them is fading. The effect of fading on a wireless channel will also add power consumption on mobile devices and can reduce the information signal power. However, fading can be overcome by using a cooperative communication system which is a method that utilizes antenna from other users (relays) with the principle of diversity, so the performance of wireless communication system can be improved. This paper proposes power saving on two-way cooperative communication system based on data rate ratio. The method of setting the value of this data rate ratio aims to minimize power consumption in a two-way cooperative communication system, i.e., a full-duplex communication system with quantized and forward (QF) relay protocol. To obtain a minimum power consumption, the ratio of the data rate must be set on the assumption that the value of the transmit power of each source and the relay is equal. The result shows that the system performance is improved, the system SNR value becomes lower, and the power is more efficient by adjusting the ratio of data rate compared to the conventional system without power control.
Efisiensi Energi Sistem Komunikasi Kooperatif Multi-relay Quantize and Forward Berdasarkan Pemilihan Relay Akhyar, Fityanul; Nasaruddin, Nasaruddin; Muharar, Rusdha
Jurnal Nasional Teknik Elektro dan Teknologi Informasi (JNTETI) Vol 6, No 1 (2017)
Publisher : Jurusan Teknik Elektro dan Teknologi Informasi, Fakultas Teknik, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1262.974 KB) | DOI: 10.22146/jnteti.v6i1.296

Abstract

Currently, the increasing energy consumption is a global issue. Information technology and telecommunication industry is one of the areas with the largest energy consumption. The growth of mobile data users is an issue and the biggest challenge for the future. The cooperative wireless communication system has been the focus of research as one of the information delivery strategy with more efficient energy consumption. Energy efficiency in the cooperative wireless communication system can be improved by using a relay between base station and user device, where the distance between base station and user can be shortened, thus, the energy transmission can be minimized. Relay mechanism can be built by utilizing the protocol in the cooperative communication system, such as amplify and forward (AF), decode and forward (DF), and quantize and forward (QF). Relay-selection is an important issue in a cooperative wireless communication system that can reduce energy consumption at the system level. This study analyzes energy efficiency of multi-relay QF cooperative communication for line-of-sight (LOS) and non-line-of-sight (NLOS) environment based on relay selection strategies: reactive and proactive relay selection. A computer simulation is conducted based on a system model and mathematical analysis. Energy efficiency is calculated based on power consumption of signal transmission and observed in the distance between the source, relay, and destination. Simulation result shows that multi-relay QF networks with relay selection consume lower energy than without relay selection, hence, the energy usage in the relay selection networks is more efficient. Moreover, the strategy of proactive relay selection provides low energy consumption and high energy efficiency compared to the reactive relay selection strategy.
Pengenalan Karakter Tulisan Tangan Jawi Menggunakan Metode New Relative Context dan SVM Fikri, Rizal; Arnia, Fitri; Muharar, Rusdha
Jurnal Nasional Teknik Elektro dan Teknologi Informasi (JNTETI) Vol 5, No 3 (2016)
Publisher : Jurusan Teknik Elektro dan Teknologi Informasi, Fakultas Teknik, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1237.171 KB) | DOI: 10.22146/jnteti.v5i3.262

Abstract

Dot is an important attribute in character recognition. Similarly in Jawi characters, a dot becomes a special characteristic that distinguish different characters with the same basic shape. Most of feature extraction methods only recognize the characters based on their basic shape and ignore the dots, such as Relative Context (RC). RC classifies characters with the same basic shape into a group. Therefore, the result recognition of RC is not individual characters, but the name of group character. To identify individual character, a new method for RC enhancement is introduced. The method is called New Relative Context (NRC). NRC works by separating characters into some areas. The wider area is defined as the basic shape, while other areas are defined as dot attribute. In this paper Support Vector Machine (SVM) is used to classify eleven sets of isolated Jawi characters. Eight sets of character images are used in the training phase, while in the testing phase three sets of images are used. The recognition rate of this method achieves 80%.
ANALISIS KONSUMSI DAYA SISTEM KOMUNIKASI KOOPERATIF MULTI RELAY DENGAN METODE PEMILIHAN RELAY Akhyar, Fityanul; Nasaruddin, Nasaruddin; Muharar, Rusdha
Jurnal Karya Ilmiah Teknik Elektro Vol 1, No 2 (2016)
Publisher : Universitas Syiah Kuala

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Abstract

Kinerja pada sistem komunikasi kooperatif nirkabel dapat ditingkatkan dengan menggunakan relay antara base station dan perangkat pengguna, dimana jarak antara antara base station dan pengguna dapat diperpendek sehingga kinerja transmisi dapat ditingkatkan. Relay dapat diasumsikan sebagai mini base station, repeater, atau perangkat bergerak. Mekanisme sistem relay dapat dilakukan dengan memanfaatkan protokol ? protokol yang ada dalam sistem komunikasi kooperatif seperti amplify and forward (AF), decode and forward (DF) dan quantize and forward (QF). Penelitian ini mengkaji kinerja pada sistem komunikasi kooperatif nirkabel dengan protokol QF menggunakan strategi pemilihan relay (relay-selection strategy), yaitu reactive relay selection dan proactive relay selection pada topologi jaringan multi-relay. Metode penelitian yang digunakan adalah simulasi komputer dengan pemodelan sistem dan analisis matematis. Penelitian ini dapat memberi solusi untuk meningkatkan kinerja pada sistem komunikasi nirkabel, khususnya sistem komunikasi kooperatif. Kata Kunci? topologi, komunikasi kooperatif nirkabel, quantize and forward (QF), strategi pemilihan relay, simulasi komputer.