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Operator Seluler Model Franchise di Daerah Rural Parewe, Nurfadillah A.; Hasan, Taufik; Kurniawan, Adit
Jurnal Penelitian Komunikasi, Informatika dan Media Massa Vol 16, No 1 (2013): April 2013
Publisher : BBPPKI MAKASSAR

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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 pedesaanÂ (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.

Realization of a Second Harmonic Antenna for Rural Communications* Kurniawan, Adit; Hasyim, Ahmad; Wahyu, Yuyu
Journal of Engineering and Technological Sciences Vol 38, No 2 (2006)
Publisher : ITB Journal Publisher, LPPM ITB

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.

Studi Eksperimen Unjuk-Kerja Modulasi DBPSK pada Platform Software-Defined Radio (SDR) Marpanaji, Eko; Trilaksono, Bambang Riyanto; Langi, Armein ZR; Kurniawan, Adit
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscentia Vol 1 No 1 Agustus 2008
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

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.

Perancangan Dual-Band Antena Mimo 1x4 Untuk 5G Smartphone Fitria, Lisma; Rahayu, Yusnita; Kurniawan, Adit
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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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.

Studi Eksperimen Unjuk-Kerja Modulasi DBPSK pada Platform Software-Defined Radio (SDR) Marpanaji, Eko; Trilaksono, Bambang Riyanto; Langi, Armein ZR; Kurniawan, Adit
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscentia Vol 1 No 1 Agustus 2008
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v1i1.373

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.

Developing Visual Basic-Based Science Learning Media Technology at SDN I Telukjambe Karawang Jajuli, Mohammad; Hidayat, Rahmat; Kurniawan, Adit; Juanda, Enjang Ahmad
International Conference on Elementary Education Vol. 4 No. 1 (2022): Proceedings The 4th International Conference on Elementary Education
Publisher : Elementary Education Study Program School of Postgraduate Studies Universitas Pendidikan Indonesia in collaboration with UPI PRESS

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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 studentsâ€™ 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 â€œgoodâ€ criteria.

Effective Router Assisted Congestion Control for SDN Sofia Naning Hertiana; Adit Kurniawan; Hendrawan Hendrawan; Udjianna Sekteria Pasaribu
International Journal of Electrical and Computer Engineering (IJECE) Vol 8, No 6: December 2018
Publisher : Institute of Advanced Engineering and Science

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).

Joint Routing and Congestion Control in Multipath Channel based on Signal to Noise Ratio with Cross Layer Scheme Istikmal Istikmal; Adit Kurniawan; Hendrawan Hendrawan
International Journal of Electrical and Computer Engineering (IJECE) Vol 8, No 4: August 2018
Publisher : Institute of Advanced Engineering and Science

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.

Prediction Method for Rain Rate and Rain Propagation Attenuation for K-Band Satellite Communications Links in Tropical Areas Baso Maruddani; Adit Kurniawan; Sugihartono Sugihartono; Achmad Munir
Journal of ICT Research and Applications Vol. 8 No. 2 (2014)
Publisher : LPPM ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/itbj.ict.res.appl.2014.8.2.1

This paper deals with the prediction method using hidden Markov model (HMM) for rain rate and rain propagation attenuation for K-band satellite communication link at tropical area. As is well known, the K-band frequency is susceptible of being affected by atmospheric condition, especially in rainy condition. The wavelength of K-band frequency which approaches to the size of rain droplet causes the signal strength is easily attenuated and absorbed by the rain droplet. In order to keep the quality of system performance for K-band satellite communication link, therefore a special attention has to be paid for rain rate and rain propagation attenuation. Thus, a prediction method for rain rate and rain propagation attenuation based on HMM is developed to process the measurement data. The measured and predicted data are then compared with the ITU-R recommendation. From the result, it is shown that the measured and predicted data show similarity with the model of ITU-R P.837-5 recommendation for rain rate and the model of ITU-R P.618-10 recommendation for rain propagation attenuation. Meanwhile, statistical data for measured and predicted data such as fade duration and interfade duration have insignificant discrepancy with the model of ITU-R P.1623-1 recommendation.

PERFORMA WAVEFORM SISTEM ALE 2G PADA PROSES IDENTIFIKASI KETERSEDIAAN KANAL IONOSFER SIRKUIT BANDUNG-WATUKOSEK [PERFORMANCE OF THE 2G ALE WAVEFORMS FOR IDENTIFICATION PROCESS OF IONOSPHERIC CHANNEL AVAILABILITY ON BANDUNG-WATUKOSEK CIRCUITS] Varuliantor Dear; Adit Kurniawan
Jurnal Sains Dirgantara Vol 12, No 2 (2015)
Publisher : Lembaga Penerbangan dan Antariksa Nasional

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Penelitian ini menganalisis performa waveform sistem Automatic Link Establishment (ALE)generasi kedua (2G) pada proses identifikasi ketersediaan kanal yang dilakukan berdasarkan hasilpenerapan pada sebuah sirkuit komunikasi kanal ionosfer. Analisis dilakukan dari hasilperbandingan antara perhitungan ketersediaan kanal berdasarkan kemampuan pantul oleh lapisanionosfer dan hasil penerapan waveform sistem ALE pada sirkuit komunikasi Bandung(6,53ºLS;107,35ºBT) –Watukosek (7,15ºLS;112,45ºBT) yang menggunakan sebuah frekuensi tunggal,yakni 10,1455 MHz. Hasil analisis performa identifikasi ketersediaan kanal waveform ALE dilakukandengan menyajikan kurva Bit Error Rate (BER) rata-rata sebagai fungsi Signal+Noise+Distorsi/Noise+Distorsi (SINAD), dan distribusi SINAD dari data empiris yang diperoleh. Dari kurva BER rataJurnalrata sebagai fungsi SINAD dan distribusi SINAD untuk tiap periode satu hari pengamatan,perhitungan nilai outage probability (Pout) berdasarkan kriteria nilai SINAD minimum dari BERmaksimum yang diijinkan pada sistem ALE dilakukan untuk memperoleh persentase keberhasilanidentifikasi ketersediaan kanal. Hasil perhitungan Pout dengan kriteria BER maksimum 0,288menunjukkan bahwa waveform ALE 2G tidak dapat digunakan untuk proses identifikasi ketersediaankanal hingga mencapai lebih dari 50% dari nilai ketersediaan kanal maksimum yang telah dibatasioleh nilai Lowest Usable Frequency (LUF) dan Maximum Usable Frequency (MUF). Dari hasilperhitungan Pout tersebut, persentase keberhasilan identifikasi ketersediaan kanal dalam periode satuhari juga menunjukkan bahwa penggunaan waveform sistem ALE 2G hanya mampu mengidentifikasihingga 36% dari ketersediaan kanal yang tersedia dalam satu hari. Kegagalan identifikasiketersediaan kanal tersebut menunjukkan bahwa modulasi 8-Continuous Phase Frequency ShiftKeying (CPFSK) yang digunakan pada waveform ALE 2G belum optimal dalam proses identifikasiketersediaan kanal pada propagasi sistem komunikasi ionosfer.Kata Kunci:Waveform ALE, 8-CPFSK, Identifikasi Channel Availability

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