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All Journal ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Proceeding of the Electrical Engineering Computer Science and Informatics TELKA - Telekomunikasi, Elektronika, Komputasi dan Kontrol TEKTRIKA - Jurnal Penelitian dan Pengembangan Telekomunikasi, Kendali, Komputer, Elektrik, dan Elektronika JMECS (Journal of Measurements, Electronics, Communications, and Systems) eProceedings of Engineering
Ali, Erfansyah
Telkom University
Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology

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Deteksi Radar Pasif menggunakan GNU Radio dan SDR pada Frekuensi Televisi MARPAUNG, YONATAN EDWIN; PRAMUDITA, ALOYSIUS ADYA; ALI, ERFANSYAH
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 8, No 3: Published September 2020
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v8i3.505

Abstract

ABSTRAKRadar pasif adalah salah satu jenis sistem radar bistatic dimana transmitter dan receiver berada di tempat berbeda. Sistem radar pasif dapat memaanfaatkan frekuensi siaran televisi yang tersedia sebagai sumber transmitter. Pada penelitian ini, radar pasif dibuat dengan Sofware Defined Radio (SDR) sebagai sistem komunikasi yang dapat mengkofigurasi penerima televisi digital sdr-dongle RTL2832U yang dimodifikasi dan perangkat lunak GNU Radio. Hasil pengujian delay pada gelombang 1,2,3 untuk objek manusia adalah 0,192, 0,36 dan 0,53 detik, untuk objek sepeda adalah 0,332, 0,5 dan 0,67, untuk objek motor adalah 0,422, 0,69 dan 0,86 detik, untuk objek mobil adalah 0,538, 0,7 dan 0,87 detik sehingga dapat disimpulkan bahwa sistem radar pasif yang dirancang dapat mendeteksi benda bergerak dimana pegerakan target menyebabkan pergeseran puncak Cross-Correlation.Kata kunci: Radar Pasif, Cross-Correlation, SDR, Frekuensi Televisi, RTL2832U ABSTRACTPassive radar is a type of bistatic radar system where the transmitter and receiver are in different places. Passive radar systems can utilize the available television broadcast frequencies as transmitter sources. In this study, passive radar is made with Software Defined Radio (SDR) as a communication system that can configure a modified RTL2832U sdr-dongle digital television receiver and GNU Radio software. The delay test results on waves 1,2,3 for human objects are 0.192, 0.36 and 0.53 seconds, for bicycle objects are 0.332, 0.5 and 0.67, for motor objects are 0.422, 0.69 and 0.86 seconds, for car objects are 0.538, 0.7 and 0.87 seconds so it can be concluded that the passive radar system is designed to detect moving objects where moving targets causes a shift in the peak of Cross-Correlation.Keywords: Passive Radar, Cross-Correlation, SDR, Television Frequency, RTL2832U
Single-Tone Doppler Radar System for Human Respiratory Monitoring Rizky Ambarini; Aloysius Adya Pramudita; Erfansyah Ali; Antonius Setiawan
Proceeding of the Electrical Engineering Computer Science and Informatics Vol 5: EECSI 2018
Publisher : IAES Indonesia Section

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (571.582 KB) | DOI: 10.11591/eecsi.v5.1607

Abstract

Human respiration activities can be identified from the chest wall movement. In developing a non-contacting sensor for human respiration, the chest wall movement can be detected as a Doppler shift. Therefore, the Doppler radar is potential to be implemented for the non-contacting sensor previously mention. In this paper, the Single-Tone Doppler radar which operates at 10 GHz has been studied and proposed for detecting human respiration. The simulation experimental is performed for investigating the capability of the proposed method in detecting the human respiration parameter such as respiration rate and respiration amplitude. The results show that the proposed method is capable to extract the human respiration parameter.
3D SAR (SYNTHETIC APERTURE RADAR) IMAGING SIMULATION USING JAVA Erfansyah Ali; Andriyan B Suksmono
TEKTRIKA Vol 1 No 2 (2016): TEKTRIKA Vol.1 No.2 2016
Publisher : Telkom University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25124/tektrika.v1i2.1742

Abstract

One of methods in remote sensing is Synthetic Aperture Radar (SAR). When combined with Range DopplerAlgorithm (RDA) can produce smaller radar resolution only by using normal sized antenna placed atplatform. RDA is able to generate much wider aperture “synthetic” antenna, resulting very narrow beamwidthwhen reach earth's ground. By using already established 2D SAR methods in accuracy andprocessing speed this 3D SAR simulation was developed. Simulated on 15 x 15 pixels grayscale targets atdifferent heights, 3D SAR developed on this research can detect object's height accurately. Thissimulation was developed using JAVA as steppingstone in implementing SAR image processing in smallsystem like embedded system or micro computing which normally using C programming language.
Design and Realization of Memory-Based Chirp Generator on Synthetic Aperture Radar (SAR) Bagas Dwi Putera; Erfansyah Ali; Heroe Wijanto; M. Ramdhani
JMECS (Journal of Measurements, Electronics, Communications, and Systems) Vol 4 No 1 (2018): JMECS
Publisher : Universitas Telkom

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25124/jmecs.v4i1.1695

Abstract

Synthetic Aperture Radar (SAR) is a radar system that uses platform movement combined with signal processing. Eventhough it use a small antenna, SAR produce high resolution as good as a large antenna. In SAR imaging, radar is mounted on a moving platform. It transmits electromagnetic pulses and receives backscattered echo signals. Transmitted pulses are subsequently scattered by earth surface and only small portion of them are received by antenna. SAR transmitted signals normally is a chirp or linear frequency modulation (LFM) signal. Chirp signal can be generated by using the analog and digital generator. Digital chirp generator is divided into two methods which are the memory-based and direct digital synthesizer (DDS). The difference of these two methods is located in the memory ROM. In this study, we designed and realized digital chirp generator by using Field Programmable Gate Array (FPGA) DE-1 development board for SAR implementation. It operates in 1.27 GHz (L Band) frequency and had a bandwith of 10 MHz with 24 MHz sampling rate. We found that the output of FPGA is well performed for chirp signal in digital domain.
Design and Realization of LNA Prototype Frequency 1090 Mhz for ADS-B on Nano Satellite Desio Hasbin Dafiq; Erfansyah Ali; E Edwar; Shindy Atila Putri
JMECS (Journal of Measurements, Electronics, Communications, and Systems) Vol 8 No 2 (2021): JMECS
Publisher : Universitas Telkom

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25124/jmecs.v8i2.3895

Abstract

The nanosatellite is a satellite with a weight of less than 10kg and an orbital height of 500km. Telkom University through Nano Satellite Laboratory is researching for many payloads on a nanosatellite. One of the nanosatellite payloads is Automatic Dependence Surveillance-Broadcast (ADS-B), an aircraft data transmission broadcast. The long-distance deliveries and space environmental disturbances can cause weak received signals. Therefore a Low Noise Amplifier (LNA) is needed to enhance the signal-to-noise ratio (SNR) of a received signal. This paper has successfully designed and prototyped a single-stage LNA with a gain of 12.7dB and it enhances coverage of ADS-B from 180 to 358km
The Effect Ricker Wavelet of Duty Cycle Adjustment on GPR Detection Result Aditya Rifky Ramadhan; Erfansyah Ali; A.A. Pramudita
JMECS (Journal of Measurements, Electronics, Communications, and Systems) Vol 8 No 1 (2021): JMECS
Publisher : Universitas Telkom

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25124/jmecs.v8i1.2872

Abstract

Ground Penetrating Radar (GPR) employs an ultra-wideband (UWB) signal for detecting objects under the ground surface. In a certain GPR application, a proper UWB signal is needed to obtain a good detection result. Ricker wavelet is one type of UWB signal that can be used in GPR operation. The effect of adjusting the Ricker wavelet duty cycle on the B-scan result was investigated and the result is discussed in this paper. Laboratory experiments were performed by modelling the GPR system using Vector Network Analyzer (VNA). The result shows that selecting a Ricker wavelet’s duty cycle is successful to show the target clearly.
Surface Clutter Reduction for Ground Penetrating Radar Queen Hesti Ramadhamy; Erfansyah Ali; Aloysius Adya Pramudita
JMECS (Journal of Measurements, Electronics, Communications, and Systems) Vol 8 No 2 (2021): JMECS
Publisher : Universitas Telkom

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25124/jmecs.v8i2.2869

Abstract

Surface clutter is one of the problem in GPR survey that may caused the difficulty in detecting object. The rough of the ground surface caused the surface clutter is a method for reducing the clutter is need to improved the detection result. One of method is used to achieve that objective is averaging method. In this experiment, GPR system is modelled using VNA and the averaging method is resulting on target object detection which is recognized more clearly.
Ultra Wideband Radar for Respiratory Monitoring on Sleep Position Nurul Qashri Mahardika T; Erfansyah Ali; Fiky Yosef Suratman
JMECS (Journal of Measurements, Electronics, Communications, and Systems) Vol 8 No 1 (2021): JMECS
Publisher : Universitas Telkom

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25124/jmecs.v8i1.2873

Abstract

Sleep apnea is a sleep disorder that has a relation with respiratory system during sleep.One of the sleep apnea characteristic is suddenly stop breathing during sleep. Peoplehave the dierent of respiratory rate (RR) which is affected by sleep positions andbody mass index (BMI).There are four sleep positions aecting the respiratory rate(RR). Polysomnography (PSG) is conventionally used to analysis the sleep apnea. Thistechnique requires body contact that might be uncomfortable for the patient. In thisstudy, the Xethru X4M200 radar sensor is proposed as non-contact tool to detect the RRby implementing the Doppler effect. Furthermore, the relation between RR with the sleepposition and the BMI are discused. For that purpose, 20 participants (10 males and 10females) with dierent BMIs and sleep positions are examined by monitoring their chestmovement. This method is able to detect the indication of bradypnoea or tachypnoea.Futher systematic study and more participants are required to confirm our results andprovide better non-contact technique for RR measurement.
Desain Dan Implementasi Radar Jarak Pendek Luthfi Aditama; Arfianto Fahmi; Erfansyah Ali
eProceedings of Engineering Vol 2, No 3 (2015): Desember, 2015
Publisher : eProceedings of Engineering

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Radar jarak pendek berbeda dengan Radar konvensional dalam teori dan teknik pengoperasiannya. Radar jarak pendek menggunakan sinyal transmisi kontinu dimana sistem Radar ini mentransmisi sinyal dan menerima sinyal secara simultan. Hal ini menyebabkan arsitektur radar yang tidak biasa. untuk mendapatkan data target yang akurat dan resolusi yang tinggi, Radar jarak pendek membutuhkan bandwidth yang lebar. Daerah target radar memiliki banyak sekali gangguan dari material yang tidak diinginkan atau clutter, Maka dari itu dibutuhkan pemrosesan data yang koheren dan algoritma deteksi yang tepat. Ada dua mode transmisi sinyal yang digunakan dalam RADAR jarak pendek ini. Countinuous wave dan frequency modulated continuous wave. Sinyal kontinu digunakan untuk mengobservasi efek dopler yang ditimbulkan dari target atau mengobservasi fenomena fisik secara umum. Sedangkan untuk mendapatkan jarak target digunakan sinyal FM. Dengan mengalikan sinyal transmisi FM dengan sinyal pantulnya maka jarak target dapat diketahui. Hasil akhir dari tugas akhir ini menghasilkan perangkat radar jarak pendek dengan kemampuan yang cukup baik dalam menunjukan kecepatan target dan jarak target relatif terhadap sistem radar. Dengan pemrosesan dan konversi sinyal radar menjadi data digital pada perangkat PC. Kata kunci: Radar Jarak pendek, Chirp Signal, Cluttetr Rejection
Pemrosesan Raw Data Sar (synthetic Aperture Radar) Menjadi Sar Image Space Syifa Haunan Nashuha; Erfansyah Yudhi Eka Ali; Heroe Wijanto
eProceedings of Engineering Vol 3, No 3 (2016): Desember, 2016
Publisher : eProceedings of Engineering

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Synthetic Aperture Radar (SAR) merupakan teknologi penginderaan jauh yang potensial untuk diterapkan di Indonesia. Dengan menggunakan gelombang radio sebagai ‘mata’-nya, penginderan jauh dengan SAR memungkinkan pengamatan dilakukan pada kondisi iluminasi rendah dan cuaca apapun. Hal ini jelas lebih baik dibandingkan menggunakan sensor optis. SAR memanfaatkan informasi yang dihasilkan dari kombinasi pantulan sinyal dan pergerakan plarform. Dengan informasi tersebut, platform seolah-oleh meiliki antena yang jauh lebih besar dari antena sesunguhnya dan dapat dihasilkan citra beresolusi tinggi. Penelitian ini membahas tentang bagaimana menerapkan proses pengolahan raw data SAR menjadi bentuk SAR image space. Adapun sinyal raw data SAR yang digunakan sebagai sumber dan data referensi dalam penelitian ini didapatkan dari file citra GIF berupa target titik tunggal dan jamak. Pemrosesan dilakukan dengan menggunakan perangkat lunak MATLAB dengan optimalisasi untuk menambah efisiensi dan mengurangi durasi proses. Didapatkan hasil pemrosesan pada single target dengan akurasi sebesar 98.22%. Kata kunci : SAR, Imaging, Spotlight SAR, MATLAB
Co-Authors A.A. Pramudita Aditya Rifky Ramadhan Aloysius Adya Pramudita Ambarini, Rizky Andriyan B Suksmono Antonius Setiawan Arfianto Fahmi Astenio Fahreza Dwiyuda Bagas Dwi Putera Desio Hasbin Dafiq E Edwar Edwar Edwar Edwar Fiky Y. Suratman Heroe Wijanto Ikhwan Muzzaki Luthfi Aditama M. Ramdhani MARPAUNG, YONATAN EDWIN Nurul Qashri Mahardika T Queen Hesti Ramadhamy Rizkia Feriska Rizky Ambarini Setiawan, Antonius Shabrina Zahira Shindy Atila Putri Syifa Haunan Nashuha