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All Journal Singuda ENSIKOM Indonesian Journal of Electrical Engineering and Computer Science
Suherman Suherman
University of Sumatera Utara
Computer Science & IT Engineering

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PERBANDINGAN PENGARUH BANDWIDTH REQUEST WIMAX TERHADAP KUALITAS TRANSMISI VIDEO Muhammad Fadllan Dwika; Suherman Suherman
Singuda ENSIKOM Vol 13, No 37 (2015)
Publisher : Singuda ENSIKOM

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (352.007 KB)

Abstract

Worldwide interoperabily for Microwave Access (WiMAX) merupakan teknologi Broadband Wireless Access (BWA) . Dalam proses pengiriman data dari user, WiMAX menerapkan mekanisme bandwidth request. Tulisan ini mengevaluasi dan membandingkan pengaruh mekanisme bandwidth request terhadap kualitas transmisi video. Evaluasi dilakukan dengan menggunakan network simulator 2 (NS-2). Adapun parameter yang digunakan pada penelitian ini adalah packet delay, packet loss, dan Peak Signal to Noise Ratio (PSNR) sekaligus untuk membandingkan kualitas transmisi video dari masing-masing user. Hasil simulasi menunjukkan bahwa mekanisme piggybacking menghasilkan delay terendah 0.022 detik, sedangkan unicast polling mengalami delay tertinggi 0.793 detik. Demikian juga packet lost, piggybacking 3.58% dan unicast polling 25.56%. Hal ini menyebabkan PSNR piggybacking merupakan yang tertinggi 37.4 dB dan unicast polling terendah, 24.9 dB. Sementara contention request memiliki kinerja di antara kedua mekanisme piggybacking dan polling.
Study of harmonic distortion from variable speed drive and energy saving lamps Yulianta Siregar; Waleed Khalid Al-Azzawi; Zulkarnaen Pane; Unedo E Parhusip; Suherman Suherman
Indonesian Journal of Electrical Engineering and Computer Science Vol 27, No 2: August 2022
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v27.i2.pp667-677

Abstract

The power electronic component has been widely used in the current industrial era. It has been considered more efficient than the previous devices as it saves more space and uses less power. One example of power electronic components is the variable speed drive for speed regulation of electric motors in the industrial world. Another application of power electronic components is to be used in energy-saving lamps. The use of power electronic components in these two loads generates harmonic distortion and reduces network power quality. In this paper, the authors analyzed the harmonics in both loads. As a result, the total harmonic distortion (THD) current for four energy-saving lamps is 88.3%. Meanwhile, the THD current at the 50 Hz, 5 A, and variable speed drive is 46.2%. After mixing the two loads, the THD current decreases by around 35%.
Co-Authors Muhammad Fadllan Dwika Unedo E Parhusip Waleed Khalid Al-Azzawi Yulianta Siregar Zulkarnaen Pane