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20th International Conference Radioelektronika 2010最新文献

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Using DCT coefficients flipping for information hiding in still images 利用DCT系数翻转来隐藏静态图像中的信息
20th International Conference Radioelektronika 2010 Pub Date : 2010-04-19 DOI: 10.1109/RADIOELEK.2010.5478578
R. Ridzon, Tomáš Kanócz, Peter Goč-matis, D. Levický
{"title":"Using DCT coefficients flipping for information hiding in still images","authors":"R. Ridzon, Tomáš Kanócz, Peter Goč-matis, D. Levický","doi":"10.1109/RADIOELEK.2010.5478578","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2010.5478578","url":null,"abstract":"The paper deals with information hiding in general and special focus is given to information content hiding in still images. A solution of information hiding of protected part of an image within the image itself is also presented. Three approaches are proposed - digital watermarking, DCT coefficients flipping and cryptography. The main focus of this paper is oriented to information hiding based on DCT coefficients flipping. In this case the information content protection is based on pixelisation and mosaic approach. Some experimental results are shown and advantages and drawbacks are also discussed.","PeriodicalId":398720,"journal":{"name":"20th International Conference Radioelektronika 2010","volume":"218 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114391360","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
CFAR detectors for through wall tracking of moving targets by M-sequence UWB radar 用于m序列超宽带雷达运动目标穿墙跟踪的CFAR探测器
20th International Conference Radioelektronika 2010 Pub Date : 2010-04-19 DOI: 10.1007/978-3-642-03737-5_25
D. Kocur, J. Rovnáková, M. Švecová
{"title":"CFAR detectors for through wall tracking of moving targets by M-sequence UWB radar","authors":"D. Kocur, J. Rovnáková, M. Švecová","doi":"10.1007/978-3-642-03737-5_25","DOIUrl":"https://doi.org/10.1007/978-3-642-03737-5_25","url":null,"abstract":"","PeriodicalId":398720,"journal":{"name":"20th International Conference Radioelektronika 2010","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131045092","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: 56
Target localization by a multistatic UWB radar 基于多站超宽带雷达的目标定位
20th International Conference Radioelektronika 2010 Pub Date : 2010-04-19 DOI: 10.1109/RADIOELEK.2010.5478568
M. Švecová, D. Kocur, R. Zetik, J. Rovnáková
{"title":"Target localization by a multistatic UWB radar","authors":"M. Švecová, D. Kocur, R. Zetik, J. Rovnáková","doi":"10.1109/RADIOELEK.2010.5478568","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2010.5478568","url":null,"abstract":"Moving target localization and tracking are of great interest for rescue, surveillance and security operations. The radar signal processing procedure providing the target position estimation consists of such phases of signal processing as raw radar data pre-processing, background subtraction, detection, time of arrival estimation, localization and tracking. In this paper, we will focus on the localization phase where we assume that for the target localization UWB radar equipped by one transmitting and N receiving antennas is used. Following this intention, the accuracy of the target localization provided by the least-squares method, the spherical-interpolation method and the Taylor series method applied within localization phase will be compared based on processing of radar signals obtained from real target tracking by UWB radar. The acquired results confirm that the Taylor series method can provide the best accuracy of the target positioning.","PeriodicalId":398720,"journal":{"name":"20th International Conference Radioelektronika 2010","volume":"1999 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128258578","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: 23
Fuzzy logic based call admission control with user movement prediction for UMTS system 基于模糊逻辑的UMTS系统用户移动预测呼叫接纳控制
20th International Conference Radioelektronika 2010 Pub Date : 2010-04-19 DOI: 10.1109/RADIOELEK.2010.5478589
P. Kejík, S. Hanus
{"title":"Fuzzy logic based call admission control with user movement prediction for UMTS system","authors":"P. Kejík, S. Hanus","doi":"10.1109/RADIOELEK.2010.5478589","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2010.5478589","url":null,"abstract":"Universal mobile telecommunications system (UMTS) is one of the 3rd generation (3G) cell phone technologies. The capacity of UMTS is interference limited. Radio resources management (RRM) functions are therefore used. They are responsible for supplying optimum coverage, ensuring efficient use of physical resources, and providing the maximum planned capacity. This paper deals with admission control techniques for UMTS system. A UMTS system model and several versions of admission control algorithms are presented in this paper. These algorithms are based on fuzzy logic and they use simple user movement prediction methods. The algorithms are mutually compared via simulations.","PeriodicalId":398720,"journal":{"name":"20th International Conference Radioelektronika 2010","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134493603","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: 4
Comparison of two watermarking methods based on DWT 基于小波变换的两种水印方法的比较
20th International Conference Radioelektronika 2010 Pub Date : 2010-04-19 DOI: 10.1109/RADIOELEK.2010.5478579
Peter Goč-matis, Tomáš Kanócz, R. Ridzon, D. Levický
{"title":"Comparison of two watermarking methods based on DWT","authors":"Peter Goč-matis, Tomáš Kanócz, R. Ridzon, D. Levický","doi":"10.1109/RADIOELEK.2010.5478579","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2010.5478579","url":null,"abstract":"This paper describes a new method for video watermark embedding, using the knowledges already available from watermark embedding into digital static pictures. The watermark is embedded in transformed domain using Discrete Wavelet Transform (DWT). This paper also describes experiments conducted on the proposed watermark embedding method. The goal of these experiments was the test the robustness of the method presented in the paper against several watermarking attacks.","PeriodicalId":398720,"journal":{"name":"20th International Conference Radioelektronika 2010","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116797826","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
Firmware design for a multi-protocol UHF RFID reader 多协议超高频RFID阅读器的固件设计
20th International Conference Radioelektronika 2010 Pub Date : 2010-04-19 DOI: 10.1109/RADIOELEK.2010.5478559
A. Povalac, M. Zamazal, J. Sebesta
{"title":"Firmware design for a multi-protocol UHF RFID reader","authors":"A. Povalac, M. Zamazal, J. Sebesta","doi":"10.1109/RADIOELEK.2010.5478559","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2010.5478559","url":null,"abstract":"The development of monostatic multi-protocol UHF RFID interrogator is presented. It utilizes highly integrated IDS-R902DRM reader IC, enabling cost-efficient solutions with minimum mechanical dimensions. This IC also includes dense reader mode function which prevents reading conflicts in a multi-reader environment. Emphasis is placed on the firmware design. Implementation of each supported RFID protocol is briefly described. Final part is devoted to the discussion of regulatory requirements in the European Union and in the USA.","PeriodicalId":398720,"journal":{"name":"20th International Conference Radioelektronika 2010","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127898812","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
High-speed serial differential signaling links with commercial equalizer 高速串行差分信号链路与商业均衡器
20th International Conference Radioelektronika 2010 Pub Date : 2010-04-19 DOI: 10.1109/RADIOELEK.2010.5478561
Bretislav Sevcik
{"title":"High-speed serial differential signaling links with commercial equalizer","authors":"Bretislav Sevcik","doi":"10.1109/RADIOELEK.2010.5478561","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2010.5478561","url":null,"abstract":"This paper describes an analysis of signal integrity problems in High-Speed serial links that achieves Gbps data rate and has the advantage of low cost. In this paper is implement the high-speed data serial link transceiver with pre-emphasis and commercial equalizer 6.25 Gbps into one complete model that demonstrate impact of pre-emphasis and differential equalization on the quality of received data.","PeriodicalId":398720,"journal":{"name":"20th International Conference Radioelektronika 2010","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124456868","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
On accuracy of averaged control-to-output frequency responses of switched DC-DC converters 开关DC-DC变换器控制输出平均频率响应精度的研究
20th International Conference Radioelektronika 2010 Pub Date : 2010-04-19 DOI: 10.1109/RADIOELEK.2010.5478554
Z. Kolka, D. Biolek, J. Kovar
{"title":"On accuracy of averaged control-to-output frequency responses of switched DC-DC converters","authors":"Z. Kolka, D. Biolek, J. Kovar","doi":"10.1109/RADIOELEK.2010.5478554","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2010.5478554","url":null,"abstract":"The control-to-output (CTO) frequency response of switched DC-DC converter describes how the small-signal harmonic perturbation of the converter switching duty ratio influences the converter output. In the paper, the CTO frequency response obtained by the method of harmonic balance is compared with the CTO response, obtained by applying the well-known State-Space-Averaging (SSA) technique to switched converters. These comparisons are made for the Buck-, Boost-, and Buck-Boost- type converters. Conclusions about the accuracy of the SSA method are drawn within the context of the character of the state matrices of the converter.","PeriodicalId":398720,"journal":{"name":"20th International Conference Radioelektronika 2010","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132571862","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: 4
SAR and Stolt Migration processing for plastic landmine detection 塑料地雷探测的SAR和Stolt迁移处理
20th International Conference Radioelektronika 2010 Pub Date : 2010-04-19 DOI: 10.1109/RADIOELEK.2010.5478567
V. Kabourek, P. Černý
{"title":"SAR and Stolt Migration processing for plastic landmine detection","authors":"V. Kabourek, P. Černý","doi":"10.1109/RADIOELEK.2010.5478567","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2010.5478567","url":null,"abstract":"The paper describes the plastic mine detection by Ground Penetrating Radar. The received data evaluation and imaging are based on two- and three-dimensional Synthetic Aperture Radar (SAR) and Stolt Migration methods. The results of the processing that are subject to discussion were presented using the examples of measurement of antitank mine situated on the sand surface and anti-personal mine located both on and under the sand surface.","PeriodicalId":398720,"journal":{"name":"20th International Conference Radioelektronika 2010","volume":"689 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124930577","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
Methods of spectrum sensing for cognitive radio systems using TV frequency bands 使用电视频带的认知无线电系统频谱感知方法
20th International Conference Radioelektronika 2010 Pub Date : 2010-04-19 DOI: 10.1109/RADIOELEK.2010.5478570
Petr Sramek, R. Maršálek, A. Prokeš
{"title":"Methods of spectrum sensing for cognitive radio systems using TV frequency bands","authors":"Petr Sramek, R. Maršálek, A. Prokeš","doi":"10.1109/RADIOELEK.2010.5478570","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2010.5478570","url":null,"abstract":"Cognitive radio systems are perspective solution for effective utilization of frequency spectrum. Essential feature of cognitive radio devices is scanning of certain frequency band and consequent decision making whether this band is used by primary user or not. In this paper several methods for detecting signals of analog and digital TV broadcasts are described and simulation results are presented with the use of real sampled signal from DVB receiver. Every method provides decisions with typical probabilities of false alarm or misdetection dependent on noise level. The possibility of results fusion along more than one type of detector application is discussed.","PeriodicalId":398720,"journal":{"name":"20th International Conference Radioelektronika 2010","volume":"220 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122685900","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
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