Journal of Measurements, Electronics, Communications, and Systems最新文献_第2页

Greedy Based Radio Resource Allocation Algorithm with Sectoring Scheme in D2D Underlaying Communication D2D底层通信中基于贪心分块的无线资源分配算法

Journal of Measurements, Electronics, Communications, and Systems Pub Date : 2020-12-30 DOI: 10.25124/JMECS.V7I1.3473

Putu Riyana Paramita, N. Adriansyah, V. Prabowo

引用次数: 0

COMMUNICATION SYSTEMS FOR HIGH SPEED FLYING DEVICES WITH REPETITION CODES 高速飞行装置用重复编码通信系统

Journal of Measurements, Electronics, Communications, and Systems Pub Date : 2020-04-02 DOI: 10.25124/JMECS.V0I0.2459

Dwi Juniarto, K. Anwar, D. Arseno

{"title":"COMMUNICATION SYSTEMS FOR HIGH SPEED FLYING DEVICES WITH REPETITION CODES","authors":"Dwi Juniarto, K. Anwar, D. Arseno","doi":"10.25124/JMECS.V0I0.2459","DOIUrl":"https://doi.org/10.25124/JMECS.V0I0.2459","url":null,"abstract":"Communication systems for devices moving at high speed are suffering from error-floor due to the Doppler effect. This paper proposes a simple narrowband communication systems for high speed flying devices for critical applications such as missile and drone. To make the system simple, we consider Repetition codes and slight increase of the number of pilot symbols such that the system can predict accurately the fast-changing channel due to time-selective fading. The equalizer in this paper is designed according to the addition of the pilot symbols so that the system works at a maximum speed of 450 km/h to make successful operation for missile and drone before they are taken down by the enemy. Computer simulations are used to evaluate the performance of the proposed communication systems. The operating frequency is industrial, scientific, and medical (ISM) band, where binary phase shift keying (BPSK) modulations are used with Repetition codes being the channel coding. The bit error rate (BER) performance is evaluated under additive white Gaussian noise (AWGN) and Rayleigh fading channels. The results confirm that excellent BER performances are obtained having error-floor less than 10????4 making many applications, including image transmission, are possible, which are great for high speed flying devices even with Repetition codes and simple zero forcing (ZF) equalizer. The results of this study are expected to help the development of future communication systems for missile, drone, and airplane applications.","PeriodicalId":246051,"journal":{"name":"Journal of Measurements, Electronics, Communications, and Systems","volume":"183 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124632266","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Prototype of Dual DDS FMCW Transmitter for L-Band Synthetic Aperture Radar l波段合成孔径雷达双DDS FMCW发射机样机

Journal of Measurements, Electronics, Communications, and Systems Pub Date : 2018-06-30 DOI: 10.25124/jmecs.v4i1.1694

E. Edwar, A. Munir

引用次数: 1

Design and Realization of Automatic Packet Reporting System (APRS) for Sending Telemetry Data in Nano Satellite Communication System 纳米卫星通信系统中遥测数据发送自动分组上报系统的设计与实现

Journal of Measurements, Electronics, Communications, and Systems Pub Date : 2018-06-30 DOI: 10.25124/JMECS.V4I1.1692

R. Patmasari, I. Wijayanto, R. S. Deanto, Y. Gautama, H. Vidyaningtyas

{"title":"Design and Realization of Automatic Packet Reporting System (APRS) for Sending Telemetry Data in Nano Satellite Communication System","authors":"R. Patmasari, I. Wijayanto, R. S. Deanto, Y. Gautama, H. Vidyaningtyas","doi":"10.25124/JMECS.V4I1.1692","DOIUrl":"https://doi.org/10.25124/JMECS.V4I1.1692","url":null,"abstract":"To communicate with the ground station, nano satellite requires a communication system that serves in real time to regulate the procedure with ground station. One of the missions of nano satellites is the retrieval of telemetry data from sensors that transmitted using APRS technology (Automatic Packet Reporting System). We designed a prototype to monitor sensor by utilizing the APRS. Real-time sensor data was transmitted to monitor through radio using AX.25 protocol. On the transmitter side, an APRS Tracker integrated with a microprocessor ATMEGA 1284P to modulate the AFSK signal. The existence of this AFSK signal is used to transmit and receive telemetry data using handy talky. We use a computer with AGWPE software to demodulate the AFSK signal and UI-View32 to show the telemetry data. The results showed that the telemetry data can be displayed on the receiver side and acquired in real time. The accuracy of temperature sensor received by the receiver is 92.97%, and humidity sensor is 90.57%. There was a delay of 1 second for the reception of telemetry data directly.","PeriodicalId":246051,"journal":{"name":"Journal of Measurements, Electronics, Communications, and Systems","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127156275","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Design and Realization of Memory-Based Chirp Generator on Synthetic Aperture Radar (SAR) 基于记忆的合成孔径雷达(SAR)啁啾发生器的设计与实现

Journal of Measurements, Electronics, Communications, and Systems Pub Date : 2018-06-30 DOI: 10.25124/JMECS.V4I1.1695

Bagas Dwi Putera, Erfansyah Ali, H. Wijanto, M. Ramdhani

{"title":"Design and Realization of Memory-Based Chirp Generator on Synthetic Aperture Radar (SAR)","authors":"Bagas Dwi Putera, Erfansyah Ali, H. Wijanto, M. Ramdhani","doi":"10.25124/JMECS.V4I1.1695","DOIUrl":"https://doi.org/10.25124/JMECS.V4I1.1695","url":null,"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.","PeriodicalId":246051,"journal":{"name":"Journal of Measurements, Electronics, Communications, and Systems","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130349867","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Lidar Application for Mapping and Robot Navigation on Closed Environment 激光雷达在封闭环境下测绘和机器人导航中的应用

Journal of Measurements, Electronics, Communications, and Systems Pub Date : 2018-06-30 DOI: 10.25124/JMECS.V4I1.1696

I. Maulana, A. Rusdinar, R. A. Priramadhi

引用次数: 6

Effect Of HHO On Emissions And Efficiency In Two Stroke Engine 150cc HHO对150cc二冲程发动机排放和效率的影响

Journal of Measurements, Electronics, Communications, and Systems Pub Date : 2018-06-30 DOI: 10.25124/jmecs.v4i1.1698

J. W. Paletekan, S. Suwandi, T. A. Ajiwiguna, E. Ariffin

{"title":"Effect Of HHO On Emissions And Efficiency In Two Stroke Engine 150cc","authors":"J. W. Paletekan, S. Suwandi, T. A. Ajiwiguna, E. Ariffin","doi":"10.25124/jmecs.v4i1.1698","DOIUrl":"https://doi.org/10.25124/jmecs.v4i1.1698","url":null,"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.","PeriodicalId":246051,"journal":{"name":"Journal of Measurements, Electronics, Communications, and Systems","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123475398","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0