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Jurnal Elektronika dan Telekomunikasi
Published by Lembaga Ilmu Pengetahuan Indonesia
ISSN : 14118289     EISSN : 25279955     DOI : -
Core Subject : Engineering,
Electrical & Electronics Engineering Engineering
Jurnal Elektronika dan Telekomunikasi (JET) is an open access, a peer-reviewed journal published by Research Center for Electronics and Telecommunication - Indonesian Institute of Sciences. We publish original research papers, review articles and case studies on the latest research and developments in the field of electronics, telecommunications, and microelectronics engineering. JET is published twice a year and uses double-blind peer review. It was first published in 2001.
Arjuna Subject : -
Articles 470 Documents
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Radar Penembus Dinding UWB-FMCW 500-3000 MHz R. Indra Wijaya; Purwoko Adhi; Asep Yudi Hercuadi; Dadan Muliawandana; Ros Sariningrum
Jurnal Elektronika dan Telekomunikasi Vol 14, No 1 (2014)
Publisher : LIPI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jet.v14.1-7

Abstract

Radar penembus dinding memiliki potensi untuk dapat digunakan dalam penanganan pasca bencana dan gangguan keamanan.Tulisan ini membahas hasil perancangan dan pembuatan sistem Radar Penembus Dinding Ultra Wide Band Frequency Modulated Continous Wave (UWB-FMCW) yang digunakan untuk mendeteksi keberadaan suatu objek di balik dinding. Dalam penelitian ini dikembangkan pembangkit chirp UWB menggunakan kombinasi DDS dan VCO sebagai komponen utama pembangkit gelombang FMCW untuk mendapatkan linearitas yang tinggi, merealisasikan tranceiver dalam arsitektur homodyne, mengembangkan modul akuisisi, serta merealisasikan perangkat lunak untuk melakukan pengolahan sinyal dan menampilkannya dalam bentuk citra secara real time menggunakan MS Visual C++. Sistem radar penembus dinding didesain untuk memiliki resolusi 6 cm dan jarak tidak ambigu 30 m, pada rentang pita frekuensi kerja 500 - 3000 MHz. Dari hasil pengujian dalam skala laboratorium radar ini mampu melakukan identifikasi objek dibalik dinding yang terbuat dari kayu setebal 3 cm pada jarak 4 m dan menampilkannya dalam bentuk citra A-Scan dan B-Scan secara real time.
Desain dan Implementasi Duplekser dengan Metoda Pseudo-Interdigital untuk Uplink dan Downlink LTE Enceng Sulaeman; Yaya Sulaeman; Asep Yudi Hercuadi
Jurnal Elektronika dan Telekomunikasi Vol 13, No 2 (2013)
Publisher : LIPI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jet.v13.73-80

Abstract

Duplekser merupakan perangkat yang dapat mengisolasi receiver dari transmitter saat keduanya saling berbagi antena yang sama, digunakan agar komunikasi bisa berjalan secara full duplex. Ada dua metode transmisi duplex yaitu frequency division duplex (FDD) dan time division duplex (TDD). FDD merupakan teknik duplex yang menggunakan dua frekuensi yang berbeda untuk melakukan komunikasi dalam dua arah, sedangkan TDD menggunakan frekuensi tunggal dan frekuensi tersebut digunakan oleh semua kanal untuk melakukan pengiriman dan penerimaan data. Gabungan dua bandpass filter dengan metoda pseudo-interdigital untuk aplikasi LTE (long term evolution). Metode ini lebih unggul dibandingkan duplekser dengan metoda hybrid. Duplekser bekerja pada FDD LTE band ke-7 yaitu frekuensi uplink 2500-2570 MHz dan downlink 2620-2690 MHz. Dari hasil pengukuran diperoleh sebagai berikut: nilai frekuensi center pada uplink 2639 MHz dan pada downlink 2659 MHz, insertion loss pada uplink 1,561 dB dan downlink 1,74 dB, bandwidth ±70 MHz, isolasi 23,03 dB, serta nilai return loss 23,5 dB pada uplink dan downlink 23,45 dB.
A Comparison of the Utilization of Carbon Nanopowder and Activated Carbon as Counter Electrode for Monolithic Dye-Sensitized Solar Cells (DSSC) Zaky Mubarak; Natalita Maulani Nursam; Shobih Shobih; Jojo Hidayat; Dahlang Tahir
Jurnal Elektronika dan Telekomunikasi Vol 18, No 1 (2018)
Publisher : LIPI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jet.v18.15-20

Abstract

Monolithic design is one of the most promising dye-sensitized solar cell (DSSC) architectures to develop, because it allows the elimination of one conductive substrate and offers the possibility for printing layer-by-layer of the materials that made up its structure. In this study, titanium dioxide-based monolithic type DSSCs were fabricated on a single fluorine-doped transparent oxide coated glass with TiO2 as photoanode and porous ZrO2 as spacer. The type of the carbon material used as the composite paste for the counter electrode was varied to see the effect on the solar cell efficiency. Four-point probes measurement revealed that the resistivity of the carbon layer synthesized using activated carbon exhibited slightly higher conductivity with a sheet resistance of 10.70 Ω/sq and 11.09 Ω/sq for activated carbon and carbon nanopowder, respectively. The efficiency of DSSC that uses activated carbon as counter electrode was higher (i.e. 0.221%) than the DSSC with carbon nanopowder (i.e. 0.005%). The better performance of DSSC with activated carbon as a counter electrode was due to its better conductivity and higher surface area compared to those of carbon nanopowder.
Front Cover Vol 16 No 1 Chaeriah Bin Ali Wael
Jurnal Elektronika dan Telekomunikasi Vol 16, No 1 (2016)
Publisher : LIPI Press

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Abstract

Prediction Of Myers-Briggs Type Indicator Personality Using Long Short-Term Memory Mawadatul Maulidah; Hilman Ferdinandus Pardede
Jurnal Elektronika dan Telekomunikasi Vol 21, No 2 (2021)
Publisher : LIPI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jet.v21.104-111

Abstract

Personality is defined as the mix of features and qualities that make up an individual's particular character, including thoughts, feelings, and behaviors. With the rapid development of technology, personality computing is becoming a popular research field by providing users with personalization. Many researchers have used social media data to automatically predict personality. This research uses a public dataset from Kaggle, namely the Myers-Briggs Personality Type Dataset. The purpose of this study is to predict the accuracy and F1-score values so that the performance for predicting and classifying Myers–Briggs Type Indicator (MBTI) personality can work optimally by using attributes from the MBTI dataset, namely posts and types. Predictive accuracy analysis was carried out using the Long Short-Term Memory (LSTM) algorithm with random oversampling technique with the Imblearn library for MBTI personality type prediction and comparing the performance of the method proposed in this study with other popular machine learning algorithms. Experiments show that the LSTM model using the RMSprop optimizer and learning speed of 10-3 provides higher performance in terms of accuracy while for the F1-score the LSTM model using the RMSprop Optimizer and learning speed of 10-2 gives a higher value than the proposed machine learning algorithm so that the model MBTI dataset using LSTM with random oversampling can help in identifying the MBTI personality type.
Front Cover Vol 14 No 2 Chaeriah Bin Ali Wael
Jurnal Elektronika dan Telekomunikasi Vol 14, No 2 (2014)
Publisher : LIPI Press

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Abstract

Application of Large Area TiO2 Photoelectrode on Dye-Sensitized Solar Cells Natalia M. Nursam; Lia Muliani; Jojo Hidayat
Jurnal Elektronika dan Telekomunikasi Vol 13, No 1 (2013)
Publisher : LIPI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jet.v13.1-5

Abstract

The scale-up of dye-sensitized solar cell (DSSC) has been a big issue as the DSSC technology process progresses from laboratory scale to large area applications. Meanwhile, this type of solar cell has been of great interest among PV scientist and academics as it can be produced in lower-cost processes compared to the conventional solar cells which are mostly fabricated from silicon. The fabrication of DSSC prototypes with a relatively large active area of 9x9 cm2 are demonstrated in this paper. Large area of TiO2 surface has been shown to significantly increase the ISC, as well as VOC and Pmax. Nevertheless, deterioration of fill factor (FF) was observed as the result of the increase on series resistance with respect to the increase in the photoelectrode area.
Comparison Study of Time Synchronization in NC-OFDM Systems Based on Symmetric Correlator Tajul Miftahushudur; Suyoto Suyoto
Jurnal Elektronika dan Telekomunikasi Vol 19, No 2 (2019)
Publisher : LIPI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jet.v19.57-63

Abstract

NC-OFDM as one of the candidates for the Cognitive Radio (CR) system has many challenges in the synchronizing time. This is due to the frequency sharing which can cause Narrowband Interference (NBI), which causes a very significant time synchronization error. Large errors in time synchronization can reduce overall NCOFDM system performance. In this study, we evaluate the time synchronization performance of NC-OFDM systems on the multipath channel in the present of NBI. We provide an evaluation of the time synchronization performance by comparing the time synchronization algorithm that has a timing metric such as an impulse-like (Symmetric correlator). Here, we present three algorithms that use the symbol training to calculate the arrival time of the NC-OFDM symbol. The simulation conducted by considering the effects of multipath channel, Signal to Noise Ratio (SNR), Carrier Frequency Offset (CFO), and SIR (Signal to Interference Ratio). SIR is modeled with NBI. Algorithm performance is measured by MAE (Mean Absolute Error) and MSE (Mean Squared Error). Simulation results show that the autocorrelation-based method has very poor performance in MAE and MSE tests, so it is not suitable for NC-OFDMbased Cognitive Radio systems. The GLRT (Generalized Likelihood Ratio Test) method and Iterative Normalization method perform well in case the NC-OFDM Cognitive Radio systems.
Front Cover Vol 15 No 2 Tajul Miftahushudur
Jurnal Elektronika dan Telekomunikasi Vol 15, No 2 (2015)
Publisher : LIPI Press

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Abstract

Back Cover Vol 13 No 1 Tajul Miftahushudur
Jurnal Elektronika dan Telekomunikasi Vol 13, No 1 (2013)
Publisher : LIPI Press

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Abstract

Page 27 of 47 | Total Record : 470

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