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2017 27th International Conference Radioelektronika (RADIOELEKTRONIKA)最新文献

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Fully-differential tunable fractional-order filter with current followers and current amplifiers 带电流跟随器和电流放大器的全差分可调谐分数阶滤波器
2017 27th International Conference Radioelektronika (RADIOELEKTRONIKA) Pub Date : 2017-04-19 DOI: 10.1109/RADIOELEK.2017.7937576
L. Langhammer, R. Sotner, Jan Dvorak, J. Jerabek, J. Polak
{"title":"Fully-differential tunable fractional-order filter with current followers and current amplifiers","authors":"L. Langhammer, R. Sotner, Jan Dvorak, J. Jerabek, J. Polak","doi":"10.1109/RADIOELEK.2017.7937576","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2017.7937576","url":null,"abstract":"The paper presents proposal of a fully-differential fractional (1+α)-order low-pass filter. The filter operates in the current mode. It is based on the well-known follow-the-leader feedback (FLF) topology of the the 3rd-order filtering structure utilizing fully-differential current followers (FD-CFs) and adjustable current amplifiers (ACAs), in our case, in order to approximate fractional-order low-pass filter response in particular frequency band of interest. The design correctness and proper function of the proposed filter are supported by PSpice simulations. The filter provides ability to electronically control its order in range from 1 to 2 and also offers the electronic control of the cut-off frequency. These features were tested for three different values in case of the control of the order and three different values in case of the control of the cut-off frequency.","PeriodicalId":160577,"journal":{"name":"2017 27th International Conference Radioelektronika (RADIOELEKTRONIKA)","volume":"461 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125807553","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: 7
Performance analysis of IEEE 802.11ac/ax WLAN technologies under the presence of CFO CFO存在下IEEE 802.11ac/ax无线局域网技术性能分析
2017 27th International Conference Radioelektronika (RADIOELEKTRONIKA) Pub Date : 2017-04-19 DOI: 10.1109/RADIOELEK.2017.7937579
Jiří Miloš, L. Polak, M. Slanina
{"title":"Performance analysis of IEEE 802.11ac/ax WLAN technologies under the presence of CFO","authors":"Jiří Miloš, L. Polak, M. Slanina","doi":"10.1109/RADIOELEK.2017.7937579","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2017.7937579","url":null,"abstract":"In the recent twenty years, numerous IEEE 802.11 technologies have been developed for Wireless Local Area Network (WLAN) connectivity. The common point of these technologies is that the latest IEEE 802.11 version has always several advanced features compared to its predecessor. IEEE 802.11ax is one of the upcoming technologies, primarily developed for the Industrial, Security and Medical (ISM) band. IEEE 802.11ax is planned to be released in 2019 and extend the features of IEEE 802.11ac. This paper presents a simulation-based performance analysis of the IEEE 802.11ac/ax technologies on the physical layer (PHY) level. The transmitter and receiver models of both technologies have been implemented and tested in MATLAB. Furthermore, this work explores IEEE 802.11ac/ax performance degradation that may be caused by carrier frequency offset (CFO). Results show lower resistance of IEEE 802.11ax against CFO.","PeriodicalId":160577,"journal":{"name":"2017 27th International Conference Radioelektronika (RADIOELEKTRONIKA)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122306490","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: 12
Retinal blood vessel segmentation by support vector machine classification 支持向量机分类视网膜血管分割
2017 27th International Conference Radioelektronika (RADIOELEKTRONIKA) Pub Date : 2017-04-19 DOI: 10.1109/RADIOELEK.2017.7936649
Eva Tuba, Lazar Mrkela, M. Tuba
{"title":"Retinal blood vessel segmentation by support vector machine classification","authors":"Eva Tuba, Lazar Mrkela, M. Tuba","doi":"10.1109/RADIOELEK.2017.7936649","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2017.7936649","url":null,"abstract":"Medical diagnostics has been significantly improved by introduction of digital imagery, primarily because of the powerful digital image processing tools. Digital retinal images are used for diagnostics of various diseases including diabetes, hypertension, stroke, etc. Retinal blood vessels are crucial for such diagnostics so segmentation of retinal blood vessels is an important and active research area. In this paper we propose an overlapping-block-based algorithm for retinal blood vessels segmentation based on classification by support vector machine using chromaticity and DCT coefficients as features. The proposed algorithm was tested on standard benchmark retinal images from the DRIVE data set. Results were compared with available ground truth images and other approaches from literature and vessel segmentation was excellent in all cases.","PeriodicalId":160577,"journal":{"name":"2017 27th International Conference Radioelektronika (RADIOELEKTRONIKA)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133348655","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: 32
Commercial CW Doppler radar design and application 商用连续波多普勒雷达的设计与应用
2017 27th International Conference Radioelektronika (RADIOELEKTRONIKA) Pub Date : 2017-04-19 DOI: 10.1109/RADIOELEK.2017.7937577
M. Reznicek, P. Bezousek
{"title":"Commercial CW Doppler radar design and application","authors":"M. Reznicek, P. Bezousek","doi":"10.1109/RADIOELEK.2017.7937577","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2017.7937577","url":null,"abstract":"In this paper CW Doppler radar design and application are presented. The impact of a wide antenna main lobe on the received signal is demonstrated, based on the developed received signal model. Then a design of an active antialiasing filter and a signal processing technique using an OS-CFAR algorithm are describe. Also a simple algorithm for target resolution and its speed estimation is introduced. Experimental results comparing two radar sensors, supplemented with our own signal processing hardware, are shown in the last paragraph. This confirm the antenna effect on the radar signal behavior.","PeriodicalId":160577,"journal":{"name":"2017 27th International Conference Radioelektronika (RADIOELEKTRONIKA)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131838088","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
Close vehicle warning for bicyclists based on FMCW radar 基于FMCW雷达的近距离车辆警告
2017 27th International Conference Radioelektronika (RADIOELEKTRONIKA) Pub Date : 2017-04-19 DOI: 10.1109/RADIOELEK.2017.7937597
Tomáš Krejčí, M. Mandlik
{"title":"Close vehicle warning for bicyclists based on FMCW radar","authors":"Tomáš Krejčí, M. Mandlik","doi":"10.1109/RADIOELEK.2017.7937597","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2017.7937597","url":null,"abstract":"The aim of this article is to show the concept of the close vehicle warning based on Frequency Modulated Continuous Wave (FMCW) radar. The radar works at frequency 24.1 GHz with 180 MHz bandwidth and it is intended to detect cars behind a bicyclist. The implementation of the signal processing is tested in the simulation and it is realized in Field Programmable Gate Array System On Chip and with low-cost FMCW radar. The system is installed on the bicycle.","PeriodicalId":160577,"journal":{"name":"2017 27th International Conference Radioelektronika (RADIOELEKTRONIKA)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125394084","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: 6
Coexistence between DVB-S/S2 and DAB systems - a special coexistence scenario DVB-S/S2和DAB系统共存——一种特殊共存场景
2017 27th International Conference Radioelektronika (RADIOELEKTRONIKA) Pub Date : 2017-04-19 DOI: 10.1109/RADIOELEK.2017.7937596
D. Kresta, L. Polak, T. Kratochvil
{"title":"Coexistence between DVB-S/S2 and DAB systems - a special coexistence scenario","authors":"D. Kresta, L. Polak, T. Kratochvil","doi":"10.1109/RADIOELEK.2017.7937596","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2017.7937596","url":null,"abstract":"This paper deals with a study of a special coexistence scenario that can occur between Digital Audio Broadcasting (DAB) and Digital Video Broadcasting-Satellite (DVB-S/S2) systems in a common radio frequency (RF) band. In this situation, the DAB is an interferer system, whereas the DVB-S/S2 is a victim system. An experimental workspace was realized to emulate and explore such a scenario. To evaluate a performance of the affected DVB-S/S2 signal, a bit and modulation error ratios (BER and MER) are used, respectively. Results of measurements, dependencies of these error values on a frequency shift between central carriers of both systems, and on a signal level difference of both RF signals are presented. Finally, results are analyzed and discussed in details.","PeriodicalId":160577,"journal":{"name":"2017 27th International Conference Radioelektronika (RADIOELEKTRONIKA)","volume":"134 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128546496","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
Phase estimation of illumination pattern in structured illumination microscopy 结构照明显微镜中照明模式的相位估计
2017 27th International Conference Radioelektronika (RADIOELEKTRONIKA) Pub Date : 2017-04-19 DOI: 10.1109/RADIOELEK.2017.7937590
J. Pospíšil, K. Fliegel, M. Klima
{"title":"Phase estimation of illumination pattern in structured illumination microscopy","authors":"J. Pospíšil, K. Fliegel, M. Klima","doi":"10.1109/RADIOELEK.2017.7937590","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2017.7937590","url":null,"abstract":"Conventional structured illumination microscopy (SIM) methods require precise knowledge of the illumination pattern and assume the sample to be stationary during the acquisition. Fulfilling these two conditions in practice is difficult. Therefore, the estimation of illumination pattern from acquired images is necessary. Inaccurate estimation of spatial frequency, angular orientation or phase shift of the illumination pattern leads to unwanted image reconstruction artifacts. In this paper, we analyze the performance of different phase estimation approaches using simulated SIM data from a synthetic sample.","PeriodicalId":160577,"journal":{"name":"2017 27th International Conference Radioelektronika (RADIOELEKTRONIKA)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130354891","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
Experimental study of the basic parameters and the field strength of a television transmitter in the single frequency network (SFN) 单频网络中电视发射机基本参数和场强的实验研究
2017 27th International Conference Radioelektronika (RADIOELEKTRONIKA) Pub Date : 2017-04-19 DOI: 10.1109/RADIOELEK.2017.7936640
T. Iliev, G. Mihaylov, E. Ivanova, I. Stoyanov, D. Radev
{"title":"Experimental study of the basic parameters and the field strength of a television transmitter in the single frequency network (SFN)","authors":"T. Iliev, G. Mihaylov, E. Ivanova, I. Stoyanov, D. Radev","doi":"10.1109/RADIOELEK.2017.7936640","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2017.7936640","url":null,"abstract":"Television broadcasting of information appears to be one of the most commonly used means of information services and is widely used in various spheres of society. Primary method of reaching these objectives is the transition from analog to digital methods of formation and transmission of the signals. In this paper are examined the structure and the specific parameters of the DVB-T network in Bulgaria. We have carried out measurements of key parameters of the TV transmitter NEC DTU-52/2R7SQ, and conducted an experimental study of field strength in various geographic points.","PeriodicalId":160577,"journal":{"name":"2017 27th International Conference Radioelektronika (RADIOELEKTRONIKA)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123341790","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
Embedded video processing on Raspberry Pi 树莓派上的嵌入式视频处理
2017 27th International Conference Radioelektronika (RADIOELEKTRONIKA) Pub Date : 2017-04-19 DOI: 10.1109/RADIOELEK.2017.7937598
G. Árva, T. Fryza
{"title":"Embedded video processing on Raspberry Pi","authors":"G. Árva, T. Fryza","doi":"10.1109/RADIOELEK.2017.7937598","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2017.7937598","url":null,"abstract":"The paper presents a study of existing methods for motion and face detection algorithms and their application to the on-board miniature Raspberry Pi computer. The algorithms realized by OpenCV functions were modified to optimize their operation on the mentioned platform, which could be used as an embedded surveillance system. The paper also mentions the training of a custom classifier for hand detection, what could be further used as a basis for detecting hand gestures.","PeriodicalId":160577,"journal":{"name":"2017 27th International Conference Radioelektronika (RADIOELEKTRONIKA)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116941156","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
Electrically short active antennas for M-sequence UWB systems m序列超宽带系统的电短有源天线
2017 27th International Conference Radioelektronika (RADIOELEKTRONIKA) Pub Date : 2017-04-19 DOI: 10.1109/RADIOELEK.2017.7937588
M. Pecovský, P. Galajda, S. Slovák, J. Sachs
{"title":"Electrically short active antennas for M-sequence UWB systems","authors":"M. Pecovský, P. Galajda, S. Slovák, J. Sachs","doi":"10.1109/RADIOELEK.2017.7937588","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2017.7937588","url":null,"abstract":"Antennas are key elements of every radio device. As their dimensions are proportional to the operational wavelength, they are becoming the limiting element for handheld devices operating at lower frequencies. In this article, the novel concept of active receiving and transmitting antennas is proposed for an M-sequence UWB (ultra wide band) ground penetrating radar (GPR) to minimize dimensions, complexity and costs of the antennas. Radiation principles of selected electrically short antennas are described and appropriate active circuits are designed as well. Their performance is verified by measurements in the UWB system. Using the electrically short antennas with active circuits designed in this work, 8 dB higher received signal level has been achieved in lower part of the frequency band while reducing costs, dimensions and weight of the antennas approximately 10-fold.","PeriodicalId":160577,"journal":{"name":"2017 27th International Conference Radioelektronika (RADIOELEKTRONIKA)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129277883","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: 6
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