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Contact Name
Ismudiati Puri Handayani
Contact Email
iphandayani@telkomuniversity.ac.id
Phone
+6281285658967
Journal Mail Official
iphandayani@telkomuniversity.ac.id
Editorial Address
Jl Telekomunikas 1 Terusan Buah Batu
Location
Kota bandung,
Jawa barat
INDONESIA
JMECS (Journal of Measurements, Electronics, Communications, and Systems)
Published by Universitas Telkom
ISSN : 24777994     EISSN : 24777986     DOI : https://doi.org/10.25124/jmecs.v6i1
Journal of Measurements, Electronics, Communications, and Systems (JMECS) is a scientific open access journal featuring original works on communication, electronics, instrumentation, measurement, robotics, and security networking. The journal is managed by the School of Electrical Engineering and published by Telkom University. The target audience of JMECS are scientists and engineers engaged in research and development in the above-mentioned fields. JMECS publishes full papers and letters bi-annually in June and December with a high standard double blind review process. Review cycles are typically finished within twelve weeks by application of modern electronic communication facilities. All published articles are checked using ithenticate plagiarism checker software. The scopes include: ELECTRONICS (ELEC) Theory and Design of Circuits Biomedics COMMUNICATION SYSTEMS (COMS) Information Theory Source Coding Channel Coding Optical Communications Wireless Communications SIGNAL PROCESSING (SIGN) Signal and System Image Processing AUTOMATION AND ROBOTICS (AUTO) Industrial Automation Control Theory Control Systems INSTRUMENT AND MEASUREMENT (INST) Power systems Renewable energy Smart Building Sensors Acoustics MATERIAL AND DEVICES (MATE) Material for Electronics Nanomaterials Photonics NETWORKING AND SECURITY (NETW) Network Theory Communication Protocols Switching Internet of Things, ANTENNA AND MICROWAVE (ANTE) Antennas Propagations Nanosatellite Radar Remote Sensing Navigation ARTIFICIAL INTELLIGENCES (ARTI) Machine Learning Intelligent Transportation Systems
Articles 57 Documents
RFID Reader Microstrip 915 MHz Design For Ticketing Highway Toll Without Tapping Muhamad Abdul Rahman Suyudi; Bambang Setia Nugroho; Edwar Edwar
JMECS (Journal of Measurements, Electronics, Communications, and Systems) Vol 5 No 1 (2019): JMECS
Publisher : Universitas Telkom

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25124/jmecs.v5i1.1954

Abstract

The use of radio frequency identification (RFID) for gateless highway toll ticketing system is expected to have an excellent accuracy in detecting every passing car. Practically, a RFID reader should be able to precisely read tags installed in cars queuing in a certain lane, while avoiding any reading of car tags in other queuing lanes or outside the reader’s reading range. Therefore, a microstrip antenna for the reader is required to have a proper configuration. In this work, an RFID reader antenna microstrip, has been proposed, operating at 915 MHz and deployable at highway gates. The proposed beam width is intentionally configured to cover the width of one gate lanes, avoiding excessive coverages on other lanes. Besides, the antenna is intended to have a circular polarization, hence avoiding any reading problem despite potential tilting of RFID tag in a passing car. The resulting gain is 1.77 dB, which is expected to affect the amount of transmitting power required by an RFID transmitter. Looking at the result of this study, the proposed antenna is stated to be applicable for RFID readers at gateless highway system.
Determination of Operational Threshold for Coding and Modulation Combination to Improve The Quality of High Throughput Satellite in Ka-Band Frequency in Indonesia M. Pasaribu; Heroe Wijanto; Budi Prasetya
JMECS (Journal of Measurements, Electronics, Communications, and Systems) Vol 2 No 1 (2016): JMECS
Publisher : Universitas Telkom

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25124/jmecs.v2i1.1483

Abstract

The vast enhancement of telecommunication technology has encouraged the increase of demand for more satellite capacity. HTS in Ka-Band frequency, that can deliver more capacity up to 50 GHz, can be a solution. Unfortunately, Ka-Band is susceptible to rain attenuation which is potentially difficult to be implemented in Indonesia because of its high rain rate. But, According to the previous research by Suwadi, Marrudani, and Lye, the combination of coding and modulation technique can be used as a solution to improve the performance of service dealing with rain attenuation. In this research, the writer will try to improve whether the combination of coding and modulation is also able to improve HTS Ka-Band communication link here ini in Indonesia with the high rain rate per year and to determine threshold of which the combination of coding and modulation that is best suited to each weather condition, in order to get the minimum required performance with BER min = 10 − 8. The conclusion of this research shows that the quality of HTS in Ka-Band frequency in Indonesia with BER = 10 − 8 can be improved by using QPSK, 8-APSK, 16-APSK, and 9 types of FEC. Furthermore, the 17 pairs of ModCod can be categorized into 8 thresholds that will determine with that ModCod that should be used in order to get the link quality of BER = 10 − 8 for each certain rain condition.
Energy Efficient Device-to-Device Weighted Clustering Method in Public Safety Networks F Rachmawati; I Wahidah; A T Hanuranto; L V Yovita; B Narottama
JMECS (Journal of Measurements, Electronics, Communications, and Systems) Vol 5 No 1 (2019): JMECS
Publisher : Universitas Telkom

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25124/jmecs.v5i1.2036

Abstract

In this work, device-to-device weighted clustering communication is observed in the system of public safety network. Previous algorithm is aimed to avoid unnecessary cluster head re-selection for a steady cluster in the mobile ad-hoc network with a weighted clustering method. Public Safety Network for disaster area, however, differs from the traditional network due to several restrictions, such as shorter end-to-end delay requirement and unavailability of backbone resources. We propose the Improved Weighted Application Clustering Algorithm (IWACA) with additional weight factor for selection of cluster heads in the public safety network. The cluster heads selection algorithm, which is based on the energy-aware of User Equipment (UE) and Quality of Services (QoS), is also taken into consideration and evaluated in the simulation. The results show that energy saving as much as 5.96% can be attained with our proposed algorithm (IWACA) compared to Brust’s. In addition, the delay is decreased 10.96% lower than previous method. With this improvement, the IWACA method becomes more feasible for public safety networks.
Lidar Application for Mapping and Robot Navigation on Closed Environment I. Maulana; Angga Rusdinar; R. A. Priramadhi
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.v4i1.1696

Abstract

Mapping and navigation on robots are now widely applied in areas such as industry, home appliances, military, exploration and automated vehicles. Mapping and navigation of robots are essential for use in closed environments that are hard to reach by humans. With the mapping and navigation on the robot can allow the robot to recognize the surrounding environment.Data from LIDAR sensors can be converted to maps of the surrounding environment and can be used as an estimate of the position of robots in a closed environment. The distance data from the LIDAR sensor and the LIDAR sensor position status data are converted into Cartesian axes and processed into local maps. Localization using LIDAR sensors are used as a reference to updating global maps.
Audio Steganography using Modified Enhanced Least Significant Bit in 802.11n Hartoko Carolus Ferdy Setiaji; Suhartono Tjondronegoro; Bambang Hidayat
JMECS (Journal of Measurements, Electronics, Communications, and Systems) Vol 1 No 1 (2015): JMECS
Publisher : Universitas Telkom

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25124/jmecs.v1i1.1479

Abstract

Steganography is a technique to improve the security of data, which is by inserting messages or confidential information using a medium called the host or carrier or cover. A wide variety of digital media can be used as a host, among others audio, image, video, text, header, IP datagram, and so forth. For audio steganography, the embedded audio is called stego-audio. Steganography can be cracked by using steganalysis. By exploiting the weaknesses of each steganography method. Many steganography method has been developed to increase its performance. This work proposed audio steganography scheme called Modified Enhanced Least Significant Bit (MELSB) which is modified version of Enhanced Least Significant Bit (ELSB). This method using Modified Bit Selection Rule to increase SNR and robustness of stego-audio. SNR result after applying MELSB scheme is increased. MELSB scheme also increase robustness of stego-audio. MELSB still work fine until amplification level 1.07. MELSB also work fine against noise addition better than ELSB and LSB. It give BER and CER with value 0 at SNR 33 dB. MELSB work fine in real-time condition on 802.11n WLAN if there is no transcoding and noise addition between sender’s and recipient’s computer.
X-Band Microstrip Bandpass Filter Design using Square Loop Resonator and Defected Ground Structure E. Edwar; M.R. Yusron; Dharu Arseno
JMECS (Journal of Measurements, Electronics, Communications, and Systems) Vol 7 No 1 (2020): JMECS
Publisher : Universitas Telkom

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25124/jmecs.v7i1.2037

Abstract

Filter is an important part in telecommunication system including in radar system. To get the better performance in selecting the signal, a ftlter must have a good Q-Factor. In this paper, an investigation of a ftlter design for synthetic radar has been successfully done. This ftlter has been designed to work at x-band using square loop resonator (SLR). A Defected Ground Structure (DGS) has been implemented to this work to increase the Q-factor of the ftlter. The result of measurement getting that the center frequency at 9.51 GHz with the bandwidth 610 MHz and PCB size of this ftlter is 22 mm x 16 mm.
Dual Steganography in Digital Images with Spread Spectrum Insertion Method Sofia Saidah
JMECS (Journal of Measurements, Electronics, Communications, and Systems) Vol 5 No 1 (2019): JMECS
Publisher : Universitas Telkom

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25124/jmecs.v5i1.2073

Abstract

This study aims to prove whether embedding a stego-image within another cover can be performed to deceive hackers or unauthorized people. In steganography, both concealing the fact that secret message is sent and its content are concerned. Dual steganography means to make unauthorized people think that the first cover is the real message. The first step is to embed the secret text message into the first cover image using Spread Spectrum (SS) method. After that, the resulting stego-image was transformed using the Discrete Wavelet Transform (DWT) method followed by the insertion process using the Singular Value Decomposition (SVD) method. The result of this study shows that the system can perform dual steganography with good imperceptibility. Parameters measured in the average of 35 dB of PSNR and 30 dB of SNR in the first embedding process; meanwhile, for the second process the system performed in the average of 41 dB of PSNR and 38 dB of SNR. Also, in the extraction process, BER measured close to 0. Although some basic attack scenarios such as Gaussian noise, Salt and Pepper noise, Low Pass Filter (LPF) and High Pass Filter (HPF) were performed in this research, more advanced attack scenarios can be discussed in future research; for instance, compression and geometric transform.
Spectrum Sensing in Cognitive Radio Using Combined Sequential Energy Detector and Cyclostationary Feature Detector Santosh Poudel; Heroe Wijanto; Fiky Y. Suratman
JMECS (Journal of Measurements, Electronics, Communications, and Systems) Vol 2 No 1 (2016): JMECS
Publisher : Universitas Telkom

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25124/jmecs.v2i1.1487

Abstract

In the following research, we derive a detector which is based on sequential probability ratio test (SPRT) and it uses Energy Detector (ED) which is followed by Cyclostationary Feature Detector (CFD). ED is a blind sensing technique and it is easy to implement while conceptually simple. However, it is highly affected by interference and noise uncertainties. Therefore, CFD is applied for fine sensing as research has shown that Cyclostationary Feature Detector is more suitable than the energy detection when noise uncertainties are unknown. Our method is novel in trying to derive a sequential Energy Detector and combine it with Cyclostationary Feature Detector for low SNR region where average sample number (ASN) as a random variable may take very high value to achieve a desired performance level for sequential Energy Detector. For this sequential Energy Detector is terminated after it reaches certain cut-off sample number, making it truncated sequential Energy Detector.
ON THE DESIGN OF BCH CODES POLYNOMIALS FOR DIGITAL TELEVISION DVB-T2 BROADCASTING SYSTEMS Hilman Auzan Mulyono; Khoirul Anwar; Budi Prasetya
JMECS (Journal of Measurements, Electronics, Communications, and Systems) Vol 6 No 1 (2020): JMECS
Publisher : Universitas Telkom

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25124/jmecs.v6i1.2828

Abstract

Digital Video Broadcasting Terrestrial{Second Generation (DVB-T2) requires a high coding rate to transmit data of high-quality video. This paper evaluates Bose-Chaudhuri-Hocquenghem (BCH) codes for the DVB-T2 to measure the gain of BCH codes. This paper evaluates the BCH codes as outer coding to be combined with other different inner encoding schemes such as Low Density Parity Check (LDPC) codes and convolutional codes to measure the best suitable inner encoding scheme. This paper also studies the performances of BCH codes for DVB-T2 specified by two different standards, i.e., (a) The European Telecommunications Standards Institute (ETSI) Technical Specification (TS) 102 831 and (b) ETSI European Standard (EN) 302 755. To obtain better error correcting capability, we propose new BCH polynomials based on the general guideline from ETSI TS 102 831 for Galois Field GF(214). We perform computer simulations to evaluate bit-error-rate (BER) performances under additive white Gaussian noise (AWGN) channel and Indonesia DVB-T2 channel model. We revealed the superiority of BCH codes in high data rate transmission, which is required for DVB-T2, and found that BCH codes are better suited to the LDPC codes as inner encoding rather than to the convolutional codes. We also confirmed that BCH codes of DVB-T2 from ETSI TS 102 831 using the proposed BCH polynomials have better performances compared to the standard polynomial of ETSI EN 302 755. We are expecting that the obtained polynomials can be adopted by the BCH codes of Indonesia DVB-T2 system. These results are expected to support the Indonesian government in determining the parameters of the BCH codes of DVB-T2 for Indonesia.
Effect Of HHO On Emissions And Efficiency In Two Stroke Engine 150cc J. W. Paletekan; S. Suwandi; Tri Ayodha Ajiwiguna; Eddy Ariffin
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.v4i1.1698

Abstract

Emission generated by motor vehicles is one of the environmental pollution and it can interfere with the health, especially on the 2-stroke engine in which the emissions are greater than the 4-stroke engine. In this study, HHO, generated by electrolysis process in a reactor, was injected into 2-stroke engine. A test method called "idle" was performed using SNI 19-7118.3-2005 standard so that the emissions generated on the 2-stroke engine was reduced. HHO was added by forwarding the gas through the hose on bubbler and entering the air hose filter in the carburator. The reactors were conditioned to produce 400 ml electrolysis and a catalyst such as KOH with different concentrations. It affected the rate of HHO flow. Prior to the addition of HHO, levels of HC was 6453 ppm at 6000 rpm and it decreased by 31.66% when the HHO was added. This decrease also occurred in CO, where the levels of CO fell from 2. 56% to 1.75 %. On the other hand CO2 levels increased from 2.23 % to 4.22 % with the HHO addition. In this study, it was found that the best HHO rate was147 mLpm. Besides, at 6000 rpm, the engine efficiency increases 5.1 % when 147 mLpm HHO was added.