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All Journal International Journal of Electrical and Computer Engineering IAES International Journal of Artificial Intelligence (IJ-AI) JURNAL ITENAS REKAYASA REKA ELKOMIKA TELKOMNIKA (Telecommunication Computing Electronics and Control) Bulletin of Electrical Engineering and Informatics Sinergi ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika PROtek : Jurnal Ilmiah Teknik Elektro JETT (Jurnal Elektro dan Telekomunikasi Terapan) ComTech: Computer, Mathematics and Engineering Applications Indonesian Journal of Electrical Engineering and Computer Science REKA ELKOMIKA: Jurnal Pengabdian kepada Masyarakat
ARSYAD RAMADHAN DARLIS
Institut Teknologi Nasional Bandung
Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Mathematics

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Implementasi Sistem Komunikasi Video menggunakan Visible Light Communication (VLC) DARLIS, ARSYAD RAMADHAN; LIDYAWATI, LITA; JAMBOLA, LUCIA; WULANDARI, NURUL
REKA ELKOMIKA Vol 2, No 3 (2014)
Publisher : REKA ELKOMIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (484.09 KB)

Abstract

ABSTRAK Visible Light Communication (VLC) adalah sebuah sistem komunikasi yang memanfaatkan cahaya tampak sebagai media dalam komunikasi antar perangkat. Pada penelitian ini,  teknologi Visible Light Communication (VLC) dalam sistem komunikasi yang akan diimplementasikan ini informasi yang akan dikirim  berupa video. Metodologi penelitian yang digunakan dengan cara mentransformasikan Informasi digital  menjadi sinyal analog oleh modulator, kemudian diubah menjadi cahaya oleh lampu sehingga cahaya lampu mengandung informasi. Selanjutnya cahaya tersebut diterima oleh photodiode yang akan mengubah menjadi sinyal listrik. Sinyal listrik yang berupa sinyal analog tersebut diubah kembali menjadi informasi digital kembali oleh demodulator setelah sebelumnya dikuatkan terlebih dahulu. Dengan adanya penelitian ini, manusia dapat berkomunikasi atau bertukar informasi hanya dengan cahaya lampu. LED dapat mengirimkan sebuah informasi berupa video (gambar bergerak) yang akan diterjemahkan kembali oleh photodiode. Pada penelitian ini hasil gambar video yang tampak pada monitor yang dikirim melalui transmitter dengan menggunakan LED belum sempurna, hal ini disebabkan oleh faktor pemilihan LED dan photodiode yang belum sesuai untuk mengirimkan data sepenuhnya. Gain pada sistem transceiver memiliki rata-rata sebesar 7,78 dB. Dengan rata-rata faktor delay pembacaan frekuensi sebesar 17,49 µs. Kata Kunci : LED, Transceiver, Video, Cahaya Tampak ABSTRACT Visible Light Communication (VLC) is a communication system that utilizes visible light as a medium of communication between devices. In this study, technological Visible Light Communication (VLC) in a communication system that will be implemented this information to be sent in the form of video. The research methodology used to transforming the way digital information into an analog signal by the modulator, then converted into light by the light bulbs so that the information it contains. Furthermore, the light received by the photodiode which will convert it into electrical signals. Electrical signal in the form of analog signals are converted back into digital information returned by the demodulator after previously strengthened first. Given this research, humans can communicate or exchange information only with light. LEDs can transmit information in the form of a video (moving pictures) that will be translated back by a photodiode. In this study the results of video images that appear on the monitor that is sent through the transmitter by using LED is not perfect, this is caused by a factor in choosing the LED and photodiode are not suitable to transmit the data completely. Gain on transceiver system has an average of 7.78 dB. With an average delay factor frequency of 17.49 µs. Keywords: LED, Transceiver, Video, Visible Light
Perancangan dan Implementasi Sistem Komunikasi Laser Berdaya 1 mW BANGUN, JAPE ATHAN; LIDYAWATI, LITA; DARLIS, ARSYAD RAMADHAN
REKA ELKOMIKA Vol 1, No 3 (2013)
Publisher : REKA ELKOMIKA

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Abstract

Abstrak Perkembangan teknologi telah menunjukkan peningkatan yang cukup signifikan, terutama untuk bidang komunikasi. Ini terbukti dengan banyaknya media komunikasi baik itu nirkabel maupun kabel. Pada penelitian ini digunakan cahaya sebagai media sistem komunikasi, selain fungsi cahaya sebagai penerangan. Pada penelitian ini direalisasikan prototype sistem komunikasi Laser yang memanfaatkan fungsi cahaya dari Laser untuk menjadi sistem komunikasi. Prototype sistem komunikasi laser ini terdiri dari pemancar dan penerima. Pemancar terdiri dari Laser, transformator audio dan batere. Sedangkan penerima terdiri dari photodioda, amplifier dan catu daya. Metode yang digunakan dalam pengukuran adalah metode Line of Sight (LOS) pada saluran terbuka dan saluran tertutup. Parameter yang dapat mempengaruhi hasil output sistem komunikasi adalah jarak dan cahaya luar, karena semakin jauh jarak tempuh Laser maka semakin kecil intensitas cahaya yang diterima receiver. Hasil yang diperoleh dari pengukuran transmisi bahwa pada kondisi siang hari sistem komunikasi laser yang dirancang dapat bekerja pada jarak 5 meter sedangkan pada malam hari bekerja pada jarak 10,5 meter. Kata kunci: laser, Sistem komunikasi, Line of Sight, prototype. Abstract The development of technology  was have shown a significant increase, especially for the communication field. This evidenced by the number of communication media both wireless and wired. Thus in this research, the utilized light as a medium of communication systems was applied to the light as illumination. This research will be realized the prototype of laser communication system. Prototype of laser communication system consisted of a transmitter and a receiver. The transmitter consisted of a laser, audio transformer and batere. While the receiver consisted of photodioda, amplifier and power supply. The used method in this measurement was Line of Sight (LOS) in the open channel and the closed channel. The parameters those could affect the output of the communication system were distance and outside light, because the farther the distance, the smaller the laser light intensity that received by the receiver. The result obtained from transmission measurements in a day condition,was the laser communication system that could work in 5 meters while in the night work was in 10,5 meters. Keywords: laser, Communication systems, Line of Sight, prototype.
Analisis Kinerja Modulasi M-PSK Menggunakan Least Means Square (LMS) Adaptive Equalizer pada Kanal Flat Fading DARLIS, ARSYAD RAMADHAN; PUTRI, FADDIA NURA; ARYANTA, DWI
REKA ELKOMIKA Vol 2, No 3 (2014)
Publisher : REKA ELKOMIKA

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Abstract

Abstrak Dalam proses sistem pentransmisian, sinyal dilewatkan pada sebuah media atau kanal untuk mengirim suatu informasi dari transmitter menuju receiver. Pada sistem komunikasi dengan menggunakan kanal, sinyal informasi yang dikirimkan pasti mengalami gangguan (noise) yang mengakibatkan terjadinya kesalahan pada sisi penerima. Untuk menekan pengaruh noise, dapat digunakan equalizer pada sisi penerima. Equalizer yang digunakan dalam perancangan ini adalah equalizer adaptif. Equalizer adaptif adalah equalizer  yang secara otomatis menyesuaikan dengan karakteristik dari kanal yang selalu berubah-ubah sepanjang waktu. Pada penelitian ini akan dirancang sebuah simulasi sistem transmisi menggunakan kanal Flat Fading dengan modulasi Phase Shift Keying M-array (M-PSK), dimana di penerima digunakan equalizer linier adaptif menggunakan Algoritma Least Mean Square (LMS). Hasil pengujian terhadap kinerja BER pada sistem transmisi M-PSK sebelum dan sesudah menggunakan equalizer pada rentang Eb/No 0 hingga 40 dB menunjukkan perbaikan kinerja sistem sebesar 0,5838 sampai dengan 0,0841. Kata Kunci : kanal flat fading, equalizer adaptif, LMS, BER dan M-PSK Abstract In the process of the transmission system, the signal is passed to a medium or channel to send the information from the transmitter to the receiver. In the communication system by using the channel, the information transmitted signal may experience interference (noise) which resulted an errors at the receiver side. To suppress the influence of noise, it can be used equalizer at the receiver side. Equalizer used in this design was the adaptive equalizer. The adaptive equalizer was the equalizer that automatically adjusted to the characteristics of the channel that always changing over time. This research designed a transmission system using Flat Fading channel with Phase Shift Keying modulation M-array (M-PSK), which was used in the receiver adaptive equalizer linier using Least Mean Square Algorithm (LMS). The test results of the BER performance of M-PSK transmission systems before and after using the equalizer in the range of Eb/No 0 of Up 40 dB showed improved system performance by 0,5838 to  0,0841. Keywords : flat fading channel, adaptive equalizer, LMS, BER and M-PSK.
Perancangan dan Implementasi Reflector Antena Wifi dengan Frekuensi 2,4 GHz YURANDI, NUGRAHA; JAMBOLA, LUCIA; DARLIS, ARSYAD RAMADHAN
REKA ELKOMIKA Vol 1, No 3 (2013)
Publisher : REKA ELKOMIKA

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Abstract

ABSTRAK Saat ini wifi sudah banyak diaplikasikan di berbagai lokasi strategis. Di tempat - tempat tersebut biasanya para pengguna bebas menggunakan akses internet. Bagi yang tempat tinggalnya dekat dengan access point merupakan suatu keuntungan, bagi yang tempat tinggalnya jauh bisa mengakses access point tersebut dengan membangun antena dengan gain yang tinggi sebagai penerima, karena dengan gain yang tinggi maka jangkauan meningkat, salah satu contohnya ada antena directional dengan reflector parabola. Pada penelitian ini dirancang dan diimplementasi antena menggunakan reflector dengan bahan wajan dan kawat. Perancangan dibuat berdasarkan perhitungan rumus secara teoritis terhadap titik fokus reflector dan waveguide, dan diuji dengan kondisi di dalam ruangan dan di luar ruangan. Dari hasil pengukuran dan analisis, diperoleh gain wajanbolic dan gridbolic sama sebesar 17,065 dBi, sedangkan gain berdasarkan teori sebesar 17,18 dBi. Level sinyal wajanbolic sebesar -40,94 dBm ( indoor ) dan -75,38 dBm ( outdoor ) lebih besar dibandingkan level sinyal gridbolic sebesar -47,02 dBm ( indoor ) dan -83 dBm ( outdoor ). Wajanbolic menangkap 16 access point sedangkan gridbolic 14 access point. Dengan demikian wajanbolic lebih unggul dibandingkan gridbolic. Kata kunci : Reflector, Wajanbolic, Gridbolic, Access Point ABSTRACT   Currently wifi is widely applied in various strategic locations. In that place, usually the user is free to use internet access. Those who lived close to the access point is an advantage, for those who have access to their homes far away access point is to build a high gain antenna as a receiver, because when the gain is high then the range increases, there is one example of a directional antenna with a parabolic reflector . In this research, it was designed and implemented the antenna  using a reflector with frying pan and wire materials. The design was based on the calculation of the theory formula for the focal point reflector and waveguide, and tested in the indoor and outdoor conditions. From the measurement and analysis, it has obtained where the wajanbolic and gridbolic had the same gain of 17.065 dBi, while based on the theory the gain was 17.18 dBi. The wajanbolic signal levels were -40.94 dBm wajanbolic (indoor) and -75.38 dBm (outdoor), where it was greater than the gridbolic signal levels as -47.02 dBm (indoor) and -83 dBm (outdoor). The wajanbolic capture was 16 access points while that the gridbolic was 14 access point. Thus the wajanbolic better than the gridbolic.   Keywords : Reflector, Wajanbolic, Gridbolic, Access point
Actuators, IoT and IP Address as Training in Actuators, IoT and IP Address for Senior High School Teachers and StudentsBasic Industrial Instrumentation Waluyo, Waluyo; Widura, Andre; Aryanta, Dwi; Darlis, Arsyad Ramadhan; Subarna, Nana; Rustamaji, Rustamaji; Sawitri, Kania; Fauziah, Dini; Syahrial, Syahrial; Syafitri, Niken; Hadiatna, Febrian
REKA ELKOMIKA: Jurnal Pengabdian kepada Masyarakat Vol 1, No 1 (2020): REKA ELKOMIKA
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/rekaelkomika.v1i1.10-24

Abstract

The third mission of a university is a community service. Based on this mission, this paper presents the activity of community service. The activity was training for senior high school students and teachers. The subjects of the training are actuators, IoT, and IP address. These components or subsystems are very important basic industrial instrumentation for further automation. These subsystems are very correlated with each other. Some actuators are electric, hydraulic, and pneumatic types. There are many applications of IoT and IP addresses, such as smart grids and communications.
Remotely Garden Irrigation for Residential Area Based on Internet of Things (IoT) Lidyawati, Lita; Kristiana, Lisa; Darlis, Arsyad Ramadhan; Jambola, Lucia; Susana, Ratna
REKA ELKOMIKA: Jurnal Pengabdian kepada Masyarakat Vol 1, No 1 (2020): REKA ELKOMIKA
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/rekaelkomika.v1i1.35-44

Abstract

Activities such as planting and gardening become one of prominent hobbies. An issue of having such well grown plants is the impractical and unachieavable task to monitor 24 hours a day, thus we need a smart gardening system that can monitor the garden on demand. One of the problems in residential gardening systems is how to water the plants while the owner is not at home. Some of people have an adequate knowledge of using IoT to make their life easier. This paper proposes a simple automatic gardening system in watering several plants as programmed. In addition, this system allows human’s manual intervention either locally or remotely via Internet, to control a water pump. To build this smart gardening system, we use Xiaomi home application from Google Play. In this application, we can set the program to water the plants daily with definite time periodic independently.
Security and Watering System Counseling Based on Internet of Things (IoT) in Pondok Hijau Indah Residential Area Lidyawati, Lita; Jambola, Lucia; Darlis, Arsyad Ramadhan; Kristiana, Lisa; Susana, Ratna
REKA ELKOMIKA: Jurnal Pengabdian kepada Masyarakat Vol 1, No 2 (2020): REKA ELKOMIKA
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/rekaelkomika.v1i2.65-74

Abstract

Nowadays, security and gardening systems in densely populated residential areas are generally done manually. The security system in housing sometimes places security posts at street corners that are some distance from citizen’s homes thus they cannot be monitored at all times. Whereas other problem of watering system in citizen’s homes, someone has to water the plants one by one that it is not efficient in  energy, time and water availability thus that it can reduce the quality of the plants. Internet of Things (IoT) is a concept and method for remote control, monitoring, and various tasks. IoT is connected to a network that it can be accessed anywhere which can make things easier. IoT can be used to solve various problems. One of them is security issues and gardening activities. By using smart home technology, the security system is carried out by placing CCTV (Closed Circuit Television) which can be accessed by the home owner, anytime and anywhere the home owner is located. On the other hand, gardening is one of the most popular hobbies. In this field, IoT can be used to monitor and regulate various things to support gardening activities. In this community service activity, we are proposed a simple automatic gardening system for watering some plants programmatically in Pondok Hijau Indah residence. The system also allows manual human intervention either locally or remotely via the internet to control CCTV and water pumps. To build this smart Home system we will use the Xiaomi Home application from Google Play. In this application, we can set a program to control CCTV and water the plants every day at a certain time periodically, in this case, we set every 7 hours to watering the plants. 
Bidirectional Underwater Visible Light Communication Arsyad Ramadhan Darlis; Andre Widura; Muhamad Rifan Andrian
International Journal of Electrical and Computer Engineering (IJECE) Vol 8, No 6: December 2018
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (945.998 KB) | DOI: 10.11591/ijece.v8i6.pp5203-5214

Abstract

In this paper, a novel bidirectional underwater visible light communication (BiUVLC) is proposed. The VLC transmitter transmits an information signal using the one of RGB LED through the water tank that represents an underwater environment and then is received by VLC receiver via a color filter. The color LEDs and color filters are utilized in bidirectional systems. The single link is created by a LED on the transmitter and the color filter on the receiver with the same color which represents a single wavelength. The performance of the proposed BiUVLC system was evaluated via implementations. The experimental result shows that the transmitted signal undergoes attenuation over the underwater optical channel and the pair of the blue wavelength in link 1 and the green wavelength in link 2 have the best performance than the other wavelength pair. In the crosstalk measurement, the red wavelength color is the worst in the underwater environment.
Light follower systems for visually impaired using visible light communication Arsyad Ramadhan Darlis; Lucia Jambola; Tedi Hadyansyah
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 19, No 1: February 2021
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v19i1.16509

Abstract

Visual impairment is the condition of someone who has a disorder or an obstacle in their vision. In this research, the implementation of light follower systems for visually impaired using visible light is proposed. This system can enable visually impaired people to determine orientation and support mobility, especially in an indoor situation, using visible light. The prototype of the visually impaired pathway was made as visible light communication (VLC) transmitter consisting of a 12 V power supply, light emitting diode (LED), MPEG-1 Layer-3 (MP3), and band pass filter (BPF) filter circuit. The VLC receiver is made a prototype of a blind stick consisting of a photodiode, amplifier, buzzer, timer, and 9 V battery. The measurement of this system uses acrylic and color filters with system accuracy taking into account the angle and conditions when the fluorescent lights are turned on and off. This result showed the system could transmit audio signals at a frequency of 3000 Hz. Furthermore, the comparison results showed that the quality of measurements without using a filter is better than using a filter. The output voltage value without using a filter with an angle of 700 degree is 7.19 Vp-p, meanwhile using a filter with an angle of 700 degree is 6.48 Vp-p.
Digital watermarking image using three-level discrete wavelet transform under attacking noise Lita Lidyawati; Arsyad Ramadhan Darlis; Lucia Jambola; Lisa Kristiana; Rea Ramada Jayandanu
Bulletin of Electrical Engineering and Informatics Vol 11, No 1: February 2022
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/eei.v11i1.3565

Abstract

The authentication, identification, and copyright protection can be obtained by constructing the digital image watermarking technique. Watermark robustness and imperceptibility account for the capability of the hidden watermark to survive the manipulation. The proposed paper is a robust algorithm for digital image watermarking with 3-level discrete wavelet transform (DWT) with some attacks method. The 3-level DWT method was used constants α=0.01 and 0.03 as a function of how depth the watermark inserts to the host image in the insertion and extraction process. The algorithm was evaluated using 8 bits per pixel (bpp) grayscale, 1024x1024 pixels for the host image, and 256x256 pixels for the watermark image. The method is also implemented some experimental with attacks such as gaussian, salt and pepper, blurring, and compression. The algorithm is relatively acceptable of good quality, achieves low-value mean squared error (MSE), high peak signals to noise ratio (PSNR), and structural similarity index metric (SSIM) value approach to 1. It is found that the highest image quality measurements by using α=0.03 with the attacking method of salt and pepper yield MSE=0.01, PSNR=45.6 dB and SSIM=0.95, respectively. 
Co-Authors ABIBI, MUHAMMAD HIDAYAT ABIMANYU, AHMAD Adisty Hanny Asri AHMAD ARSYAD Andre Widura ANITA PURNAMA SARI ARCHANDHIKA, HEGAR REFALDY ARDHIANSYAH PRATAMA, ARDHIANSYAH ASMARINA MUSHLIHA JAYA BIMA BIMA, BIMA BUDI PRATAMA, BUDI DECY NATALIANA Denny Darlis DEWI, IRMA AMELIA DIMAS PRIYAMBODHO, DIMAS DWI ARYANTA DWIPUTRA, REZA FADILAH Enceng Sulaeman FADDIA NURA PUTRI Fauziah, Dini FEBRIAN HADIATNA HARIANTI ASRI DEWI, HARIANTI ASRI Hartati, Etih HUSAENI, DZIKRI FACHRI JAPE ATHAN BANGUN Kania Sawitri KRISTIANA, LISA LEONARD TAMPUBOLON LITA LIDYAWATI LUCIA JAMBOLA Malaha, Windi Muhamad Rifan Andrian Munawaroh, Sofa Jauharotul Nana Subarna, Nana Niken Syafitri NUGRAHA YURANDI NURUL WULANDARI POERNOMO TRISAPTO pribadi, aditya arif RATNA SUSANA Rea Ramada Jayandanu RUSTAMAJI RUSTAMAJI Samudra, Muhammad Bagus SHOLIHAH, TRIANI RAKHMANIAH SOLIHIN SUPARMAN, SOLIHIN SYAHRIAL SYAHRIAL Tedi Hadyansyah Trisani, Faradilla Rizqi Waluyo Waluyo Widura, Andre WIRDA SRI FARHANI, WIRDA SRI YUNUS, EKA MUHAMMAD Zulqifli Maulana