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2016 26th International Conference Radioelektronika (RADIOELEKTRONIKA)最新文献

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Electromagnetic field in high frequency welder surroundings 高频焊机环境中的电磁场
2016 26th International Conference Radioelektronika (RADIOELEKTRONIKA) Pub Date : 2016-04-19 DOI: 10.1109/RADIOELEK.2016.7477418
P. Bieńkowski, B. Zubrzak
{"title":"Electromagnetic field in high frequency welder surroundings","authors":"P. Bieńkowski, B. Zubrzak","doi":"10.1109/RADIOELEK.2016.7477418","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2016.7477418","url":null,"abstract":"Paper describes the character of electromagnetic field (EMF) distribution in high frequency welder surrounding based on measurements performed for various welding scenarios, depending on material type, layer count and welding parameters. Measurement results were presented, visualized and discussed. Welding process and its parameters were described and also brief description of high frequency welder construction and operation principal was delivered.","PeriodicalId":159747,"journal":{"name":"2016 26th International Conference Radioelektronika (RADIOELEKTRONIKA)","volume":"73 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116250466","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
Description of Alphasat satellite space motion and its consequences for signal reception 相位卫星空间运动的描述及其对信号接收的影响
2016 26th International Conference Radioelektronika (RADIOELEKTRONIKA) Pub Date : 2016-04-19 DOI: 10.1109/RADIOELEK.2016.7477396
V. Pek, V. Brazda, O. Fiser
{"title":"Description of Alphasat satellite space motion and its consequences for signal reception","authors":"V. Pek, V. Brazda, O. Fiser","doi":"10.1109/RADIOELEK.2016.7477396","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2016.7477396","url":null,"abstract":"The article deals with description of spatial motion of the experimental radio-communications satellite Alphasat. The used Cartesian coordinates of the Alphasat satellite (given one week in advance in the OEM files of 5 minute resolution) are described. The coordinates conversion to the elevation and azimuth from the perspective of the receiver in Prague is added and described. This satellite motion causes some problems with signal reception - automatic antenna tracking is required or at least the antenna beam width extension. We found that the elevation of the Alphasat currently fluctuates up to 2,5°; in the case of azimuth it is up to 0.5° in Prague. The time period of these changes is 23 hours and 56 minutes. And more, also long-term trends of elevation/azimuth are described in this contribution.","PeriodicalId":159747,"journal":{"name":"2016 26th International Conference Radioelektronika (RADIOELEKTRONIKA)","volume":"125 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116265073","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: 9
Semantically similar document retrieval framework for language model speaker adaptation 语义相似的语言模型自适应文档检索框架
2016 26th International Conference Radioelektronika (RADIOELEKTRONIKA) Pub Date : 2016-04-19 DOI: 10.1109/RADIOELEK.2016.7477408
J. Staš, D. Zlacký, D. Hládek
{"title":"Semantically similar document retrieval framework for language model speaker adaptation","authors":"J. Staš, D. Zlacký, D. Hládek","doi":"10.1109/RADIOELEK.2016.7477408","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2016.7477408","url":null,"abstract":"The paper deals with semantically similar document retrieval framework for language model adaptation in Slovak to a specific speaker speaking style. This research extends our previous study oriented on language model speaker adaptation for transcription of Slovak parliament proceedings with available speaker-specific text data. We used a large corpora for retrieving semantically similar subset of text documents for each speaker to adjust parameters of an existing well-trained language model to a specific speaker speaking style. The same large corpora was used to build original topic-specific model of the Slovak language deployed in our automatic subtitling system. In the proposed framework, the latent semantic indexing was implemented to retrieve the subset of semantically similar documents. The output hypotheses from the first step of speech recognition were used to identify patterns between terms and concepts contained in an unstructured collection of text documents. Preliminary results show a slight improvement in speech recognition accuracy for individual speaker in fully automatic subtitling of parliament speech, broadcast news TV shows and TEDx talks.","PeriodicalId":159747,"journal":{"name":"2016 26th International Conference Radioelektronika (RADIOELEKTRONIKA)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128100854","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: 3
The critical radius of stimulation electrode related to heart activation 刺激电极的临界半径与心脏激活有关
2016 26th International Conference Radioelektronika (RADIOELEKTRONIKA) Pub Date : 2016-04-19 DOI: 10.1109/RADIOELEK.2016.7477422
E. Cocherová, J. Púc̆ik, P. Kubinec, P. Kupec, O. Ondrácek
{"title":"The critical radius of stimulation electrode related to heart activation","authors":"E. Cocherová, J. Púc̆ik, P. Kubinec, P. Kupec, O. Ondrácek","doi":"10.1109/RADIOELEK.2016.7477422","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2016.7477422","url":null,"abstract":"This article examines the dependence of stimulation current threshold on stimulation electrode radius and other cardiac tissue parameters. The dependence was evaluated on a homogeneous slab model of the heart wall, with local membrane properties determined by modified FitzHugh-Nagumo model. Simulation results reveal that stimulation current density threshold depends proportionally on diffusivity related to tissue conductivity and on membrane excitation threshold. It is also inversely proportional to stimulation electrode radius. The critical radius of the stimulation electrode for the given model parameters estimated to be 0.8 mm was compared with simulation results. Stimulation electrodes with smaller radius are ineffective in eliciting excitation in the cardiac tissue.","PeriodicalId":159747,"journal":{"name":"2016 26th International Conference Radioelektronika (RADIOELEKTRONIKA)","volume":"284 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133078991","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
ODAC-based traffic lights for intelligent transport systems 基于odac的智能交通信号灯
2016 26th International Conference Radioelektronika (RADIOELEKTRONIKA) Pub Date : 2016-04-19 DOI: 10.1109/RADIOELEK.2016.7477401
Ales Dobesch, Luis Nero Alves, O. Wilfert, Carlos Ribeiro
{"title":"ODAC-based traffic lights for intelligent transport systems","authors":"Ales Dobesch, Luis Nero Alves, O. Wilfert, Carlos Ribeiro","doi":"10.1109/RADIOELEK.2016.7477401","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2016.7477401","url":null,"abstract":"The optical digital to analog converter (ODAC) concept is introduced to be used in an intelligent transportation system (ITS). The paper explores the performance of ODAC adapted into a traffic light head in order to enable transferring information from the infrastructure to the vehicle (I2V). The performance of such a scenario is shown by reconstructing error as a function of emitter placement, LED's half power angle (HPA) and receiver's field of view (FOV). The obtained results reveal that ODAC performance strictly depends on geometrical deployment. Moreover, increasing signal frequency additionally introduces noticeable signal distortion.","PeriodicalId":159747,"journal":{"name":"2016 26th International Conference Radioelektronika (RADIOELEKTRONIKA)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130394850","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
Evaluation of memristor models for large crossbar structures 大型横梁结构忆阻器模型的评价
2016 26th International Conference Radioelektronika (RADIOELEKTRONIKA) Pub Date : 2016-04-19 DOI: 10.1109/RADIOELEK.2016.7477423
Z. Kolka, D. Biolek, V. Biolková, Zdeněk Biolek
{"title":"Evaluation of memristor models for large crossbar structures","authors":"Z. Kolka, D. Biolek, V. Biolková, Zdeněk Biolek","doi":"10.1109/RADIOELEK.2016.7477423","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2016.7477423","url":null,"abstract":"This paper is focused on comparing selected SPICE models of TiO2 memristors with respect to time- and memory requirements in the simulation of very large artificial neural networks, which are most likely the first real-world applications of memristors as analog memories. All models were implemented as HSPICE macros and simulated in a Multilayer Perceptron artificial neural network with variable configuration. The results show that after applying modifications to the models in order to prevent numerical overflows it is possible to simulate networks with tens of thousands of memristors.","PeriodicalId":159747,"journal":{"name":"2016 26th International Conference Radioelektronika (RADIOELEKTRONIKA)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124443962","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: 8
Moving edge detection with sub pixel accuracy in 1-D images 基于亚像素精度的一维图像移动边缘检测
2016 26th International Conference Radioelektronika (RADIOELEKTRONIKA) Pub Date : 2016-04-19 DOI: 10.1109/RADIOELEK.2016.7477420
M. Hagara, O. Ondrácek
{"title":"Moving edge detection with sub pixel accuracy in 1-D images","authors":"M. Hagara, O. Ondrácek","doi":"10.1109/RADIOELEK.2016.7477420","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2016.7477420","url":null,"abstract":"Image processing includes many various procedures and one of the mostly used is edge detection. Sometimes is desirable to improve precision of edge detector to sub-pixel range. In our paper we deal with precise localization of edge which is moving during the exposure time. For such the edges we tested three edge detectors with sub-pixel precision in 1-D images: algorithm that uses function erf to approximate real image samples and two edge detectors based on gray level and spatial moments of the image function. This paper presents results of simulations with noisy images, we have chosen the standard deviation of error of edge position as the precision criterion.","PeriodicalId":159747,"journal":{"name":"2016 26th International Conference Radioelektronika (RADIOELEKTRONIKA)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129609381","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
Method of improving receiver sensitivity of RFID Reader HW platforms with limited resources 有限资源下提高RFID读写器硬件平台接收灵敏度的方法
2016 26th International Conference Radioelektronika (RADIOELEKTRONIKA) Pub Date : 2016-04-19 DOI: 10.1109/RADIOELEK.2016.7477389
Michal Harvanek, V. Derbek
{"title":"Method of improving receiver sensitivity of RFID Reader HW platforms with limited resources","authors":"Michal Harvanek, V. Derbek","doi":"10.1109/RADIOELEK.2016.7477389","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2016.7477389","url":null,"abstract":"We present a method and implementation to improve the receivers of radio-frequency identification (RFID) readers while focusing specifically on RFID measurement and test instruments targeting high sensitivity simultaneously reducing the required dynamic range of the real-time signal processing blocks. The article discusses the architecture of the software defined radio which allows tag answer analysis in real time by using a new approach. The main contributions are the implementation of the fast Fourier transform in fixed point arithmetic in an field programmable gate array to reduce hardware requirements and improvement of the dynamic range which allows use of commercially available IP cores. The proposed solution, its implementation on the universal software radio peripheral (USRP), and measurement in a real environment are also presented.","PeriodicalId":159747,"journal":{"name":"2016 26th International Conference Radioelektronika (RADIOELEKTRONIKA)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128527645","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
Design of microstrip bandpass filter with electronically tunable notch response 带电子可调陷波响应的微带带通滤波器设计
2016 26th International Conference Radioelektronika (RADIOELEKTRONIKA) Pub Date : 2016-04-19 DOI: 10.1109/RADIOELEK.2016.7477380
M. A. Mutalib, Z. Zakaria, N. Shairi, W. Y. Sam
{"title":"Design of microstrip bandpass filter with electronically tunable notch response","authors":"M. A. Mutalib, Z. Zakaria, N. Shairi, W. Y. Sam","doi":"10.1109/RADIOELEK.2016.7477380","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2016.7477380","url":null,"abstract":"An integrated high selectivity microstrip wideband bandpass filter with tunable notch response is presented in this paper. The bandpass filter is designed using 7th order short circuited stub filter. Then, the first short circuited stub is replaced with two sections of open circuited stub to exhibit the transmission zeros at lower/higher stopband. The integration with notch filter is realized using U-shape Defected Microstrip Structure (DMS) with varactor diode. By properly varying the DC bias voltages, the notch response can be tuned over a constant bandwidth of around 17%. The experimental result shows that the bandwidth of the wideband bandpass filter is between 2.9 GHz - 5.8 GHz. The notch's tuning range from 4 GHz to 5 GHz is achieved using varactor diode respectively. This type of filter is suitable for applications such as the multi-service and multiband communication system in order to discriminate the undesired signals.","PeriodicalId":159747,"journal":{"name":"2016 26th International Conference Radioelektronika (RADIOELEKTRONIKA)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131306219","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
Study of the performance of RSSI based Bluetooth Smart indoor positioning 基于RSSI的蓝牙智能室内定位性能研究
2016 26th International Conference Radioelektronika (RADIOELEKTRONIKA) Pub Date : 2016-04-19 DOI: 10.1109/RADIOELEK.2016.7477344
J. Neburka, Zdenek Tlamsa, Vlastimil Benes, L. Polak, O. Kaller, L. Bolecek, J. Sebesta, T. Kratochvil
{"title":"Study of the performance of RSSI based Bluetooth Smart indoor positioning","authors":"J. Neburka, Zdenek Tlamsa, Vlastimil Benes, L. Polak, O. Kaller, L. Bolecek, J. Sebesta, T. Kratochvil","doi":"10.1109/RADIOELEK.2016.7477344","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2016.7477344","url":null,"abstract":"Recently, there is a high interest for appropriate systems and methods to localize the position of people and their devices in indoor environments (e.g. home, office, hospital). From technical and economical points of view, Bluetooth Low Energy (BLE) is one of the promising technologies in this field. This paper deals with the study of performances of this technology for these purposes. For the indoor localization, a received signal strength indication (RSSI) method is used. It was tested in ideal (anechoic chamber) and real (in the office) environment conditions. For the measurement campaign and evaluation of the obtained results a generic framework is proposed. Experimental results (simulation vs. measurement) show similar behaviour of the BLE technology in ideal (no signal reflection) and real (multipath propagation) transmission environments.","PeriodicalId":159747,"journal":{"name":"2016 26th International Conference Radioelektronika (RADIOELEKTRONIKA)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122516320","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: 42
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