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All Journal Jurnal Teknik Elektro Seminar Nasional Aplikasi Teknologi Informasi (SNATI) Transmisi: Jurnal Ilmiah Teknik Elektro Jurnal Teknik ITS IPTEK The Journal for Technology and Science TELKOMNIKA (Telecommunication Computing Electronics and Control) Jurnal Ilmiah Kursor Journal of ICT Research and Applications Seminar Nasional Informatika (SEMNASIF) ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika EMITTER International Journal of Engineering Technology Journal of Science and Applicative Technology JAVA Journal of Electrical and Electronics Engineering Journal of Strategic and Global Studies JAREE (Journal on Advanced Research in Electrical Engineering) Jurnal Nasional Teknik Elektro dan Teknologi Informasi SinarFe7 Sewagati
Gamantyo Hendrantoro
Departemen Teknik Elektro Institut Teknologi Sepuluh Nopember
Arts Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences Other

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Journal : telkomnika telecommunication computing electronics and control

 1 
An Adaptive Modulation in Millimeter-Wave Communication System for Tropical Region Suwadi Suwadi; Gamantyo Hendrantoro; Wirawan Wirawan
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 8, No 3: December 2010
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v8i3.634

Abstract

 The dominant propagation factor affecting the outage and the spectral efficiency of millimeter-wave communication systems operating at frequencies 30 GHz is rain attenuation. An adaptive modulation is proposed to improve the outage and spectral efficiency performance of the system. This paper presents an analytical procedure for the evaluation of the outage and spectral efficiency of the system in Indonesia with heavy rain rate. By comparing analytic and simulation a validation was conducted. The results show that adaptive modulation can significantly improve the outage and the spectral efficiency performance of the system, for links with long distance.
Combined Scalable Video Coding Method for Wireless Transmission Kalvein Rantelobo; Wirawan Wirawan; Gamantyo Hendrantoro; Achmad Affandi
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 9, No 2: August 2011
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v9i2.700

Abstract

Mobile video streaming is one of multimedia services that has developed very rapidly. Recently, bandwidth utilization for wireless transmission is the main problem in the field of multimedia communications. In this research, we offer a combination of scalable methods as the most attractive solution to this problem. Scalable method for wireless communication should adapt to input video sequence. Standard ITU (International Telecommunication Union) - Joint Scalable Video Model (JSVM) is employed to produce combined scalable video coding (CSVC) method that match the required quality of video streaming services for wireless transmission. The investigation in this paper shows that combined scalable technique outperforms the non-scalable one, in using bit rate capacity at certain layer.
Virtual View Image over Wireless Visual Sensor Network Nyoman Putra Sastra; Wirawan Wirawan; Gamantyo Hendrantoro
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 9, No 3: December 2011
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v9i3.740

Abstract

In general, visual sensors are applied to build virtual view images. When number of visual sensors increases then quantity and quality of  the information improves. However, the view images generation is a challenging task in Wireless Visual Sensor Network environment due to energy restriction, computation complexity, and bandwidth limitation. Hence this paper presents a new method of virtual view images generation from selected cameras on Wireless Visual Sensor Network. The aim of the paper is to meet  bandwidth and energy limitations without reducing information quality. The experiment results showed that this method could minimize number of transmitted imageries with sufficient information..
Efficient Motion Field Interpolation Method for Wyner-Ziv Video Coding I Made Oka Widyantara; Wirawan Wirawan; Gamantyo Hendrantoro
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 9, No 1: April 2011
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v9i1.687

Abstract

Wyner-Ziv video coding has the capability to reduce video encoding complexity by shifting motion estimation procedure from encoder to decoder. Amongst many motion estimation methods, expectation maximization algorithm is the most effective one. Unfortunately, the implementation of block-based motion estimation in this algorithm causes motion field profile bounded by granularity of block size. Nearest-neighbor and bilinear interpolation methods have already applied in multiview image coding to handle similar problem. This paper aims to evaluate performance of both interpolation methods in transform-domain Wyner-Ziv video codec. Results showed that bilinear interpolation effective only for high motion video sequences. In this scenario, it has bitrate saving up to 3.29 %, 0.2 dB higher PSNR, and 12.30 % higher decoding complexity compared to nearest-neighbor. In low motion video content, bitrate saving only gained up to 0.82%, with almost the same PSNR, while decoding complexity increase up to 10.32%.   
Curtailed-Gaussian and Cosine Functions for Multihop Doppler Spectrum Modeling Titiek Suryani; Gamantyo Hendrantoro
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 9, No 1: April 2011
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v9i1.671

Abstract

            Wireless channels are characterized among others by their Doppler spectrum. In the cooperative diversity, one of diversity branch may consist of several mobile relays forming multihop link which each hop introduced Doppler shift. With employing amplify-and-forward (AF) relays, the Doppler shift keeps accumulating to the end of the link. Doppler shift value affects the time varying channel rate, which is a challenge in broadband mobile communication system. Hence, the Doppler parameter is very important and must be considered in broadband mobile communication system design and analysis. Unfortunately, it is hard to derive the expressions of this Doppler spectrum in a closed form since a special function under integration such as complete elliptic integral exists.  To solve this problem, curve-fitting method base on least-square is used. In this process, curtailed-Gaussian and cosine functions are proposed as an approximation function. Then, from Kullback-Leiber divergence test, it is showed that both proposed functions, i.e., curtailed-Gaussian and cosine functions have a good approximation as Doppler spectrum modeling of Multihop mobile channel with all gain relays assumed as 1 and all mobile terminals are assumed move with almost same velocity.  
Co-Authors Achmad Affandi Achmad Mauludiyanto Achmad Mauludyanto Agriniwaty Paulus Ahmad Maulidiyanto Ahmad Muhiddin Ainun Jariyah Aji Hidayat Muryono Alan Sujadi Amarulla Octavian Amin Suharjono Andi Nurul Utami Husain Arif Fathoni Aris Pradana Aryo Darma Adhitya Boedinoegroho, Hany Bura, Romie O. Destya Arisetyanti Devy Kuswidiastuti Dewa Made Wiharta Dika Oktavian Prasetya Dwicahyono, Taufik Dyah Ayu Kusumaningtyas Harsono Endang Widjiati Endroyono Endroyono Endroyono, E Eni Dwi Wardihani Fadhli, Mohammad Fannush Shofi Akbar Farandi Febrianto Pratama Fathur Zaini Rachman Firmansyah, Mohammad Rifqi Fitri Adi Iskandarianto Fitri Amillia Fredy Indra Oktaviansyah Gatot Kusrahardjo Gatra Erga Yudhanto Gilang Almaghribi Sarkara Putra Harinto Mukti Legowo I Made Oka Widyantara Ikhwanti Indahsari Iwan Hendrianto Kalvein Rantelobo Krisdaniawan, Darien Raditya Krisnatianto Tanjung Mohammad Ariza Fardhiyansyah Muhammad Dwi Rifqi Muhammad Fachry Nova Muhammad Hasan Mahmudy Muhammad Rendy Anggara Muhammad Rizal Habibi Muhammad Yahya Batubara Niko Permana R.W. Ninik D. Yundariani Nisa Rachmadina Novalia Pertiwi Nur Ikhwan Nyoman Putra Sastra Octiana Widyarena Prasetiyono H Mukti Prasetiyono Hari Mukti Prima Kristalina Puji Handayani Pujo Widodo, Pujo Purwoko Adhi Rahayu, Sri Rheyuniarto Sahlendar Asthan Riyan Eka Pratama Rochmawati Ada Wiyah Rufiyanto, Arief Safirina Febryanti Saharani, Aulia Sardjono Trihatmo Septiawan, Reza Setijadi, Eko Siswahyudianto Sri Rahayu SRI RAHAYU Suwadi Suwadi Theresia Dwi Lestari Londong Titiek Suryani Tri Budi Santoso Walid Maulana Hadiansyah Wibowo, Reyhan Adinathan Widyanto Dwiputra Pradipta Wikantyoso, A Krisna Wirawan Wirawan Wirawan Wirawan Wirawan Wirawan Wirawan Wirawan Wirawan Wirawan Wirawan Wirawan Wirawan Wirawan Wirawan Wirawan Wismanu Susetyo Wismanu Susetyo Yahya Syukri Amrullah Yuyu Wahyu