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Application of Adaptive QAM Modulation and Diversity Scheme for 30 GHz Cellular Communications under the Impact of Rain Attention in Indonesia Gamantyo Hendrantoro; Achmad Mauludiyanto; Ninik D. Yundariani
IPTEK The Journal for Technology and Science Vol 18, No 3 (2007)
Publisher : IPTEK, LPPM, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20882033.v18i3.167

In millimeter-wave wireless cellular systems like Local Multipoint Distribution Services (LMDS) rain attenuation is an essential factor of performance degradation. It can cause signal outages and poor quality of signal reception. To mitigate the problem, a combination of diversity and adaptive modulation is proposed. To investigate the impact of the use of these techniques, a simulation is performed for a 30 GHz cellular system to obtain SNR (signalto- noise ratio), diversity gain, modulation level and BER (bit error rate). Analysis of the implementation of the combined techniques is accomplished by taking into account such factors as length of links and the combining method Simulation results show that diversity can improve the overall system SNR. Diversity gain of up to 15 dB can be achieved on two 4-km converging links at 0.01% outage probability when maximal-ratio combining (MRC) is used. For systems with luxurious link design for which the clearsky SNR is more than 30 dB, as considered in this paper, diversity and adaptive modulation do not significantly contribute to improvement of achievable transmission rate and BER performance. However, for systems with lower values of clear-sky SNR, use of both techniques will be more worthwhil.

2x2 Array Circular Microstrip Antenna Design for Altimeter Radar Antenna Applications bambang Bagus Harianto; Muhammad Rifa'i; Yuyun Suprapto; Totok Warsito; Achmad Mauludiyanto
INTEGER: Journal of Information Technology Vol 7, No 1: Maret 2022
Publisher : Fakultas Teknologi Informasi Institut Teknologi Adhi Tama Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.integer.2022.v7i1.2894

Radar Altimeter digunakan untuk mengukur jarak dari pesawat ke permukaan tanah atau permukaan laut yang bekerja pada frekuensi 4,2-4,3 GHz. Antena microstrip sebagai antena alternatif terdiri dari tambalan dan pesawat darat dengan Tembaga dan substrat menggunakan FR-4. Antena microstrip melingkar array 2x2 terdiri dari empat elemen antena melingkar tunggal yang dikombinasikan dengan teknik Wilkinson Power Divider. Optimalisasi array antena melingkar microstrip 2x2 pada 4,3 GHz sesuai dengan frekuensi operasi radar altimeter dengan kehilangan kembali -12,41 dB dalam rentang frekuensi 4,22 GHz hingga 4,36 GHz, bandwidth 144,1 MHz, VSWR 1,6, menghasilkan keuntungan 6.9 dB, serta menghasilkan pola radiasi lobus utama 7,34 dBi ke arah 20,0 deg dan beamwidth 26,3 deg. Hasil optimasi dibandingkan dengan antena microstrip melingkar tunggal, yang memiliki kehilangan pengembalian -16,19 dB dalam rentang frekuensi 4,27 GHz - 4,31 GHz, bandwidth antena ini adalah 48,4 MHz, VSWR 1,3, menciptakan keuntungan 4,3 dB, serta menghasilkan pola radiasi lobus utama 2,76 dBi ke arah 47,0 deg dan beamwidth 49,1 deg

Planning of Number and Location of New Base Transceiver Station (BTS) Tower in Mobile Telecommunication System in Jombang Using Analytical Hierarchy Process Method and Geographic Information System Approach Achmad Mauludiyanto; Yoga Dwi Pranata
JAREE (Journal on Advanced Research in Electrical Engineering) Vol 3, No 2 (2019): October
Publisher : Department of Electrical Engineering ITS and FORTEI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25796216.v3.i2.87

Technology and telecommunication industry has been growing rapidly. Operators continue to race to be able to improve its services. One of them is the development of BTS to be able to serve mobile users in the area to be reached. But development without proper planning can have a bad impact in the future. This research discussed about the location arrangement and number of BTS in Jombang regency up to 5 years according to Analytical Hierarchy Process method with population density criteria, RTRW and distance and will be displayed in digital map based on geographic information system. For 2014 there are 204 towers in Jombang while for 2019 it takes 231 towers to cover the needs of the people of Jombang Regency.Keywords: analytical hierarchy process, BTS, coverage, geographic information system, traffic capacity.

The Attenuation Characteristics of the Body Tissue on Frequency Function in WBAN Channel Achmad Mauludiyanto; Gamantyo Hendrantoro; Muhammad Fachry Nova
JAREE (Journal on Advanced Research in Electrical Engineering) Vol 5, No 2 (2021): October
Publisher : Department of Electrical Engineering ITS and FORTEI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/jaree.v5i2.185

The Wireless Body Area Network (WBAN) refers to a communication network between sensors placed on the inside, on the surface, or around the body wirelessly. WBAN system cannot be separated from body tissues. Body tissues also have electrical properties depending on frequency. Therefore, body tissue can affect the phenomena occurring in radio wave propagation in the WBAN channel. One of the phenomena is attenuation. This study investigates the impacts of body tissue on the WBAN channel and the effects of frequency on the attenuation of body tissue in the WBAN channel. The measurement of magnitude response was carried out with the human body as the measurement object by utilizing the S21 parameter measurement with a vector network analyzer. In NLOS conditions, a human body was located between two coplanar Vivaldi antenna. Measurements were conducted on the head, chest, and abdomen. The frequency used was in the range of 2 GHz to 6 GHz. The body tissue attenuation was obtained by finding the difference between the magnitude measurement response on the LOS and NLOS conditions. The attenuation data were analyzed using statistical and numerical analysis to determine the effect of frequency on the attenuation of the human body tissues. Based on the analysis results, it was identified that the frequency affected the human body tissue attenuation. The enhancement attenuation of the human body tissues occurred when the frequency was higher. Moreover, there was a significant difference in the body tissue attenuation in different parts of the body.Keywords: attenuation, body tissues, s-parameters, wireless body area network.

Implementasi Workshop Penyegaran Bagi Dosen dan Sarjana Bidang Telekomunikasi di Luar Jawa dan Indonesia Timur dengan Kombinasi Metode Daring Sinkron dan Asinkron Gamantyo Hendrantoro; Prasetiyono H Mukti; Devy Kuswidiastuti; Puji Handayani; Achmad Mauludiyanto; Sri Rahayu; Eko Setijadi
Sewagati Vol 4 No 3 (2020)
Publisher : Pusat Publikasi ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (421.864 KB)

Keterbatasan prasarana telekomunikasi dan informasi menyulitkan para dosen dan sarjana teknik yang berkarya di wilayah Indonesia timur dalam mengakses buku, jurnal, serta informasi ilmiah untuk menjaga penguasaan keilmuan dan mengikuti perkembangan teknologi di bidangnya, sesuai dengan hasil survey awal kami. Sebagai solusi, kami melaksanakan penyegaran dan peningkatan kapasitas sarjana secara daring dengan berfokus pada sarjana Teknik Elektro bidang Telekomunikasi. Pelaksanaan secara daring memungkinkan untuk menjangkau wilayah geografis yang luas di Indonesia timur. Materi yang disampaikan meliputi materi dasar, perkembangan teknologi terbaru, dan regulasi telekomunikasi, sesuai umpan balik para responden. Setiap minggu selama 13 minggu dilaksanakan workshop daring sinkron menggunakan Zoom dan Live Youtube dengan tes pasca-workshop berbasis Kahoot. Rekaman video workshop di Youtube dapat diputar oleh peserta yang tidak dapat hadir langsung, sedangkan diskusi dilanjutkan secara asinkron melalui grup Whatsapp. Survey akhir menunjukkan besarnya animo peserta, peningkatan pemahaman materi, dan apresiasi peserta terhadap inisiatif ini. Apresiasi khusus diberikan oleh peserta yang memiliki keterbatasan akses internet sehingga sulit mengikuti workshop secara sinkron, tetapi masih dapat mengikuti workshop dan diskusi secara asinkron. Tim pengabdi mengharapkan metode serupa dapat diterapkan dalam kegiatan penyegaran dan pelatihan di bidang yang lain bagi para dosen dan sarjana yang berkarya di luar Jawa dan khususnya Indonesia Timur.

Measurement And Characterization of Radio Propagation Channels from The Patient Room Hub to The Nurse Station Server for WBAN Medical Applications Mauludiyanto, Achmad; Hendrantoro, Gamantyo; Krisdaniawan, Darien Raditya
JAREE (Journal on Advanced Research in Electrical Engineering) Vol 6, No 2 (2022): October
Publisher : Department of Electrical Engineering ITS and FORTEI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/jaree.v6i2.314

As time passes, technology is demanded to be more sophisticated, efficient, and fully automatic. Technology development also impacts the medical field since hospitals require a tool that can automatically, thoroughly, and accurately record the physical condition of patients in the inpatient room and forward the results to be checked by the nurses on duty at the nurse station. Automation of patient data recording needs to be performed flexibly and comfortably for patients; thus, a wireless device channelling sensors on the patient's body to the nurse station is required. On this account, it demands a measurement to characterise the radio propagation channels. Therefore, this paper highlights the radio channel between the inpatient room hubs and the nurse station server. The measurement was performed in two rooms separated by a wall in the Antenna and Propagation Laboratory, representing an inpatient room and the nurse station. Further, the channel frequency was set at 3 GHz with a bandwidth of 200 MHz. Through the Vector Network Analyzer (VNA), the result revealed the channel response characteristic that the denser the propagation channels, the lower the power received and vice versa.

2x2 Array Circular Microstrip Antenna Design for Altimeter Radar Antenna Applications Harianto, bambang Bagus; Rifa'i, Muhammad; Suprapto, Yuyun; Warsito, Totok; Mauludiyanto, Achmad
INTEGER: Journal of Information Technology Vol 7, No 1 (2022): Maret
Publisher : Fakultas Teknologi Informasi Institut Teknologi Adhi Tama Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.integer.2022.v7i1.2894

Radar Altimeter digunakan untuk mengukur jarak dari pesawat ke permukaan tanah atau permukaan laut yang bekerja pada frekuensi 4,2-4,3 GHz. Antena microstrip sebagai antena alternatif terdiri dari tambalan dan pesawat darat dengan Tembaga dan substrat menggunakan FR-4. Antena microstrip melingkar array 2x2 terdiri dari empat elemen antena melingkar tunggal yang dikombinasikan dengan teknik Wilkinson Power Divider. Optimalisasi array antena melingkar microstrip 2x2 pada 4,3 GHz sesuai dengan frekuensi operasi radar altimeter dengan kehilangan kembali -12,41 dB dalam rentang frekuensi 4,22 GHz hingga 4,36 GHz, bandwidth 144,1 MHz, VSWR 1,6, menghasilkan keuntungan 6.9 dB, serta menghasilkan pola radiasi lobus utama 7,34 dBi ke arah 20,0 deg dan beamwidth 26,3 deg. Hasil optimasi dibandingkan dengan antena microstrip melingkar tunggal, yang memiliki kehilangan pengembalian -16,19 dB dalam rentang frekuensi 4,27 GHz - 4,31 GHz, bandwidth antena ini adalah 48,4 MHz, VSWR 1,3, menciptakan keuntungan 4,3 dB, serta menghasilkan pola radiasi lobus utama 2,76 dBi ke arah 47,0 deg dan beamwidth 49,1 deg

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