Articles
<![CDATA[Operator Seluler Model Franchise di Daerah Rural ]]>
<![CDATA[Parewe, Nurfadillah A.]]>;
<![CDATA[Hasan, Taufik]]>;
<![CDATA[Kurniawan, Adit]]>
<![CDATA[ Jurnal Penelitian Komunikasi, Informatika dan Media Massa Vol 16, No 1 (2013): April 2013 ]]>
Publisher : <![CDATA[BBPPKI MAKASSAR ]]>
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<![CDATA[Perkembangan teknologi mendorong pelaku perdagangan beralih membentuk bisnis telekomunikasi dan berkompetisi dengan menawarkan berbagai produk telekomunikasi. Namun sangat disayangkan, 50,21% dari total penduduk Indonesia yang tinggal di pedesaan (Badan Pusat Statistik Indonesia, 2010) hampir tidak terjangkau akses telekomunikasi. Masalahnya adalah para operator merasa berat berinvestasi di pedesaan karena biaya pembangunan jaringan seluler konvensional yang sangat tinggi dan tidak sebanding dengan keuntungan yang diperoleh. Selain itu keterbatasan spektrum menjadi kendala bagi calon operator baru yang ingin mengambil peran. Guna mengatasi masalah tersebut, dihasilkan sebuah model operator berbasis kerjasama franchise yang disesuaikan dengan kebutuhan pedesaan. Operator model franchise yang dimaksud dapat memberi solusi keterbatasan spektrum frekuensi karena operator hanya perlu memanfaatkan spektrum frekuensi dari operator berlisensi sehingga tidak membutuhkan alokasi frekuensi yang baru. Namun pelaksanaan franchising ini sangat tergantung pada regulasi atau peraturan telekomunikasi yang berlaku di Indonesia. Sehingga diperlukan kajian lebih lanjut mengenai Undang-Undang maupun Peraturan Pemerintah yang dapat berdampak bagi franchising operator ini. Teknologi openBTS yang dipilih sebagai solusi teknologi seluler pedesaan hanya memerlukan biaya investasi sekitar Rp 223 juta untuk membangun satu site infrastruktur di daerah terpencil. Biaya investasi ini jauh lebih murah dibandingkan biaya pembangunan infrastruktur seluler konvensional. Didukung dengan model bisnis franchise yang akan mengurangi biaya operasional operator, maka desain ini dapat menjadi peluang bisnis baru bagi operator eksisting maupun untuk memberi dukungan dalam meningkatkan produktifitas dan efisiensi infrastruktur telekomunikasi dan informasi di pedesaan.]]>
<![CDATA[Realization of a Second Harmonic Antenna for Rural Communications* ]]>
<![CDATA[Kurniawan, Adit]]>;
<![CDATA[Hasyim, Ahmad]]>;
<![CDATA[Wahyu, Yuyu]]>
<![CDATA[ Journal of Engineering and Technological Sciences Vol 38, No 2 (2006) ]]>
Publisher : <![CDATA[ITB Journal Publisher, LPPM ITB ]]>
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DOI: 10.5614/itbj.eng.sci.2006.38.2.2
<![CDATA[In this research, an active antenna operated at the second harmonic frequency is investigated, and is implemented using microstrip antenna material. The antenna consists of a FET oscillator which plays as a fundamental frequency oscillator and a frequency multiplier, and a patch antenna resonated at the second harmonic frequency as the radiator. A maximum second-harmonic output power can be extracted when the load impedance of the oscillator is optimized both at the fundamental and at the second harmonic frequencies. A rectangular patch antenna is used to radiate the second harmonic output power from the oscillator. The patch impedance is matched resistively at the second harmonic frequency. The patch antenna is fabricated using Diclad 522 microstrip substrates (relative permitivity ï¥r = 2.5) with a dielectric thickness of 1.57 mm. A GaAs FET AT-8250 transistor is used as an oscillator and a frequency multiplier and acts as the active component. Fundamental frequency is designed at 2,4 GHz band, so that the second harmonic frequency operates at 4,8 GHz band. The frequency is chosen to facilitate and to extend the needs of communications in rural areas using the unlicensed Industrial Scientific, and Medical (ISM) band. Operating the communication infrastructures intended for the use at 2.4 GHz band at its second harmonic frequency, is intended to alleviate interference levels at 2.4 GHz.]]>
<![CDATA[Studi Eksperimen Unjuk-Kerja Modulasi DBPSK pada Platform Software-Defined Radio (SDR) ]]>
<![CDATA[Marpanaji, Eko]]>;
<![CDATA[Trilaksono, Bambang Riyanto]]>;
<![CDATA[Langi, Armein ZR]]>;
<![CDATA[Kurniawan, Adit]]>
<![CDATA[ JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscentia Vol 1 No 1 Agustus 2008 ]]>
Publisher : <![CDATA[Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta ]]>
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DOI: 10.34151/technoscientia.v1i1.373
<![CDATA[This paper addresses Differential Binary Phase Shift Keying (DBPSK) modulation implemented on SDR platform for the development of digital data communications based on SDR. DBPSK modulation performance perceived at Packet Error Rate (PER) is evaluated in terms of Eb/No or S/N ratio, carrier frequency, bit rate, gain, roll-off factor of root Nyquist filter or root raised cosine filter, and of size of payload from delivered data. Based on this results, the smallest PER could be obtained by setting Eb/No value which is greater than 13 dB, carrier frequency of at least 0,3 MHz, optimum bit rate of 256 kbps, optimum range payload size of 2000 up to 4000 bytes, and roll-off factor of Nyquist or root-raised cosine filter of 0.1<alfa<0.9.]]>
<![CDATA[Perancangan Dual-Band Antena Mimo 1x4 Untuk 5G Smartphone ]]>
<![CDATA[Fitria, Lisma]]>;
<![CDATA[Rahayu, Yusnita]]>;
<![CDATA[Kurniawan, Adit]]>
<![CDATA[ Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019 ]]>
Publisher : <![CDATA[Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains ]]>
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<![CDATA[The last decade has been enormous invasion of wireless device in the evolution of technology. The requirement of high throughput is needed to provide the quality of device such as audio, data, video, and games. However, the connected devices grown and increase critcially year by year. Multiple Input Multiple Output (MIMO) that embedded for 4G technologies as one of technology that more likely to adapted on 5G to improve the data peak rate for SNR (Signal-to-Noise Ratio). Multiple Input Multiple Output (MIMO) confirmed that can be the solution to provide better efficiency. This paper will proposed the design of dual band MIMO antenna 1x4 for 5G smartphone. The proposed antenna is designed RT Duroid 5880 substrate with overall dimension size of 150x70mm. The antenna consist of 8 elements that achieved -25.24 dB of return loss at 28 GHz frequency while at 38 GHz is -26.84 dB. Then achieved gain 8.82 dBi at 38 GHz frequency and 9.52 dBi at 38 GHz. Keyword: MIMO, 5G,Dual-band, Smarthphone, Microstrip.]]>
<![CDATA[Studi Eksperimen Unjuk-Kerja Modulasi DBPSK pada Platform Software-Defined Radio (SDR) ]]>
<![CDATA[Marpanaji, Eko]]>;
<![CDATA[Trilaksono, Bambang Riyanto]]>;
<![CDATA[Langi, Armein ZR]]>;
<![CDATA[Kurniawan, Adit]]>
<![CDATA[ JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscentia Vol 1 No 1 Agustus 2008 ]]>
Publisher : <![CDATA[Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta ]]>
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DOI: 10.34151/technoscientia.v1i1.373
<![CDATA[This paper addresses Differential Binary Phase Shift Keying (DBPSK) modulation implemented on SDR platform for the development of digital data communications based on SDR. DBPSK modulation performance perceived at Packet Error Rate (PER) is evaluated in terms of Eb/No or S/N ratio, carrier frequency, bit rate, gain, roll-off factor of root Nyquist filter or root raised cosine filter, and of size of payload from delivered data. Based on this results, the smallest PER could be obtained by setting Eb/No value which is greater than 13 dB, carrier frequency of at least 0,3 MHz, optimum bit rate of 256 kbps, optimum range payload size of 2000 up to 4000 bytes, and roll-off factor of Nyquist or root-raised cosine filter of 0.1<alfa<0.9.]]>
<![CDATA[Developing Visual Basic-Based Science Learning Media Technology at SDN I Telukjambe Karawang ]]>
<![CDATA[Jajuli, Mohammad]]>;
<![CDATA[Hidayat, Rahmat]]>;
<![CDATA[Kurniawan, Adit]]>;
<![CDATA[Juanda, Enjang Ahmad]]>
<![CDATA[ International Conference on Elementary Education Vol. 4 No. 1 (2022): Proceedings The 4th International Conference on Elementary Education ]]>
Publisher : <![CDATA[Elementary Education Study Program School of Postgraduate Studies Universitas Pendidikan Indonesia in collaboration with UPI PRESS ]]>
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<![CDATA[The results of observations that have been carried out at SDN Telukjambe I Karawang show that there are main problems related to science learning. The problems are caused by the lack of students’ motivation in learning because the learning process is too monotonous at school, and the use of learning media is not optimal in supporting teaching and learning activities. The purpose of this research is to develop visual basic-based science learning media. This study is a research and development method. The research design consists of five stages, namely problem analysis, product development planning, product development, product revision, and final product. The first step is to analyze the problem of science learning. The second stage is developing science learning media by analyzing core competency standards and basic competencies based on the curriculum. The third stage is developing visual basic-based science learning media to be shown to students. The fourth stage is validating material and media by experts. Use of visual basic-based science learning media can encourage students' motivation in understanding the learning. The feasibility of visual basic-based Science learning media was obtained from the results of the assessment of the experts in media and materials that mostly obtained “good†criteria.]]>
<![CDATA[Improved Timing Estimation Using Iterative Normalization Technique for OFDM Systems ]]>
<![CDATA[Suyoto Suyoto]]>;
<![CDATA[Iskandar Iskandar]]>;
<![CDATA[Sugihartono Sugihartono]]>;
<![CDATA[Adit Kurniawan]]>
<![CDATA[ International Journal of Electrical and Computer Engineering (IJECE) Vol 7, No 2: April 2017 ]]>
Publisher : <![CDATA[Institute of Advanced Engineering and Science ]]>
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DOI: 10.11591/ijece.v7i2.pp905-911
<![CDATA[Conventional timing estimation schemes based on autocorrelation experience performance degradation in the multipath channel environment with high delay spread. To overcome this problem, we proposed an improvement of the timing estimation for the OFDM system based on statistical change of symmetrical correlator. The new method uses iterative normalization technique to the correlator output before the detection based on statistical change of symmetric correlator is applied. Thus, it increases the detection probability and achieves better performance than previously published methods in the multipath environment. Computer simulation shows that our method is very robust in the fading multipath channel]]>
<![CDATA[Performance Analysis for Uniform and Binomial Distribution on Contention Window using DSRC and Wi-Fi Direct Standard ]]>
<![CDATA[Nurain Izzati Shuhaimi]]>;
<![CDATA[Heriansyah Heriansyah]]>;
<![CDATA[Tutun Juhana]]>;
<![CDATA[Adit Kurniawan]]>
<![CDATA[ International Journal of Electrical and Computer Engineering (IJECE) Vol 5, No 6: December 2015 ]]>
Publisher : <![CDATA[Institute of Advanced Engineering and Science ]]>
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DOI: 10.11591/ijece.v5i6.pp1452-1457
<![CDATA[In this paper, we present a mathematical analysis on the performance and behavior of uniformly distributed and non-uniformly distributed backoff timer based on binomial algorithm by using two standards which is the conventional DSRC and the latest Wi-Fi Direct. DSRC is a well-known technology being considered as the most promising wireless standard in VANET. On the other hand, as the latest wireless networking standard, the potential of Wi-Fi Direct technology should be concerned. We evaluates these standards using uniform and binomial distribution for contention window under mathematical modelling in order to analyze the average throughput and collision probability performance. The results show that binomial distribution in Wi-Fi Direct standard is 7.05% and 97.13% better than uniform distribution, in terms of average throughput and collision probability, respectively. Thus we can defer that Wi-Fi Direct is feasible to be used as an alternative standard since it has been considered as potential competitor of DSRC in VANET.]]>
<![CDATA[Effective Router Assisted Congestion Control for SDN ]]>
<![CDATA[Sofia Naning Hertiana]]>;
<![CDATA[Adit Kurniawan]]>;
<![CDATA[Hendrawan Hendrawan]]>;
<![CDATA[Udjianna Sekteria Pasaribu]]>
<![CDATA[ International Journal of Electrical and Computer Engineering (IJECE) Vol 8, No 6: December 2018 ]]>
Publisher : <![CDATA[Institute of Advanced Engineering and Science ]]>
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DOI: 10.11591/ijece.v8i6.pp4467-4476
<![CDATA[Router Assisted Congestion Control (RACC) was designed to improve endto- end congestion control performance by using prior knowledge on network condition. However, the traditional Internet does not provide such information, which makes this approach is not feasible to deliver. Our paper addresses this network information deficiency issue by proposing a new congestion control method that works on the Software Defined Network (SDN) framework. We call this proposed method as PACEC (Path Associativity Centralized Congestion Control). In SDN, global view of the network information contains the network topology including link properties (i.e., type, capacity, power consumption, etc.). PACEC uses this information to determine the feedback signal, in order for the source to start sending data at a high rate and to quickly reach fair-share rate. The simulation shows that the efficiency and fairness of PACEC are better than Transmission Control Protocol (TCP) and Rate Control Protocol (RCP).]]>
<![CDATA[Joint Routing and Congestion Control in Multipath Channel based on Signal to Noise Ratio with Cross Layer Scheme ]]>
<![CDATA[Istikmal Istikmal]]>;
<![CDATA[Adit Kurniawan]]>;
<![CDATA[Hendrawan Hendrawan]]>
<![CDATA[ International Journal of Electrical and Computer Engineering (IJECE) Vol 8, No 4: August 2018 ]]>
Publisher : <![CDATA[Institute of Advanced Engineering and Science ]]>
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DOI: 10.11591/ijece.v8i4.pp2207-2219
<![CDATA[Routing protocol and congestion control in Transmission Control Protocol (TCP) have important roles in wireless mobile network performance. In wireless communication, the stability of the path and successful data transmission will be influenced by the channel condition. This channel condition constraints come from path loss and the multipath channel fading. With these constraints, the algorithm in the routing protocol and congestion control is confronted with the uncertainty of connection quality and probability of successful packet transmission, respectively. It is important to investigate the reliability and robustness of routing protocol and congestion control algorithms in dealing with such situation. In this paper, we develop a detailed approach and analytical throughput performance with a cross layer scheme (CLS) between routing and congestion control mechanism based on signal to noise ratio (SNR) in Rician and Rayleigh as multipath fading channel. We proposed joint routing and congestion control TCP with a cross layer scheme model based on SNR (RTCP-SNR). We compare the performance of RTCP-SNR with conventional routing-TCP and routing-TCP that used CLS with routing aware (RTCP-RA) model. The analyses and the simulation results showed that RTCP-SNR in a multipath channel outperforms conventional routing-TCP and RTCP-RA.]]>
