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All Journal International Journal of Electrical and Computer Engineering Prosiding KOMMIT
Randy Rahmanto
Universitas Gunadarma
Computer Science & IT Education Electrical & Electronics Engineering

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PERBANDINGAN TEKNIK MATCHING IMPEDANSI PADA TRANSPONDER UHF RFID Rahmanto, Randy; Sastriawan, Yudhana
Prosiding KOMMIT 2014
Publisher : Prosiding KOMMIT

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Abstract

Setiap chip RFID dan antena yang digunakan memiliki input impedansi. Untukmendapatkan hasil yang maksimum (Low loss energy) dibutuhkan impedansimatching. Penelitian ini membandingkan teknik matching impedansi RFID TagAntenna Coupled by Shorted Microstrip Line dan Antena Dipole dengan CPSMatching. Dengan menyesuaikan dimensi masing-masing antena, diperolehmatching antara impedansi chip RFID dengan antena. Meskipun bukan hal barunamun akan bermanfaat bagi praktisi dan pengembangan ilmu pengetahuan. Padaantena mikrostrip, matching diperoleh pada nilai A = 0.5 mm dan B = 1 mm,sedangkan pada dipole diperoleh matching pada nilai Ld=45 mm, Wd=8 mm,L=15 mm, Ls=25 mm, h=1.5 mm, Lp=12 mm dan lebar feed line 1 mm. Simulasidilakukan dengan Microwave Studio untuk antena mikrostrip dan WIPL-D prountuk antena dipole.
Adaptive power link adaptation on DVB-T system based on picture quality feedback Tubagus Maulana Kusuma; Randy Rahmanto; Emy Haryatmi
International Journal of Electrical and Computer Engineering (IJECE) Vol 9, No 4: August 2019
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (804.114 KB) | DOI: 10.11591/ijece.v9i4.pp3121-3129

Abstract

In digital television systems such as DVB-T, service provider has difficulties to observe the quality of picture reception in the viewers’ television. This is due to the unavailability of quality feedback sent from viewers’ devices to the service provider. Therefore, this research proposes link adaptation method in DVB-T system based on image quality measurement at recipient side, so that service provider may adjust the transmission power in real-time to improve the image quality. Quality metric used in this research is human perception- based no-reference image quality metric, which does not need the presence of the reference frame. The quality assessment is focused on the severeness of blocking artifact, which is the dominant artifacts in MPEG video. The numerical results have shown that power adaptation could maintain good picture quality as well as transmission power efficiency at the same time on the digital television transmission system. The proposed scheme is also suitable for other DVB system as well as various digital television system standards.
Co-Authors Emy Haryatmi Tubagus Maulana Kusuma Yudhana Sastriawan