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2009 19th International Conference Radioelektronika最新文献

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Microwave diode detector for the sixport vector analyzer 用于六端口矢量分析仪的微波二极管检测器
2009 19th International Conference Radioelektronika Pub Date : 2009-04-22 DOI: 10.1109/RADIOELEK.2009.5158795
Radek Dvorak, T. Urbanec
{"title":"Microwave diode detector for the sixport vector analyzer","authors":"Radek Dvorak, T. Urbanec","doi":"10.1109/RADIOELEK.2009.5158795","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2009.5158795","url":null,"abstract":"The vector measurement using sixport is the simple way for obtaining the magnitude and phase of the return loss or SWR. The sixport analyzer needs some power detectors for measuring microwave power on ports. This paper is focused on diode detectors and its parasitics parameters and frequency response.","PeriodicalId":285174,"journal":{"name":"2009 19th International Conference Radioelektronika","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130716086","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
Software for automatic head position monitoring 自动头部位置监控软件
2009 19th International Conference Radioelektronika Pub Date : 2009-04-22 DOI: 10.1109/RADIOELEK.2009.5158718
P. Čech, J. Dlouhý, M. Čížek, I. Vícha, J. Rozman
{"title":"Software for automatic head position monitoring","authors":"P. Čech, J. Dlouhý, M. Čížek, I. Vícha, J. Rozman","doi":"10.1109/RADIOELEK.2009.5158718","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2009.5158718","url":null,"abstract":"The automatic head position monitoring system is designed for monitoring patient head after special ophthalmological operation called Vitrectomy. In the final phase of this operation a small amount of vitreous is replaced with a bubble of expansive gas or oil to push on recovering parts of the retina. Correct position of the head during recovery time is therefore important.","PeriodicalId":285174,"journal":{"name":"2009 19th International Conference Radioelektronika","volume":"111 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116577017","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
Optimization PLL synthesizer with active RC notch filters 带有源RC陷波滤波器的锁相环合成器优化
2009 19th International Conference Radioelektronika Pub Date : 2009-04-22 DOI: 10.1109/RADIOELEK.2009.5158735
Z. Brezović, V. Kudják
{"title":"Optimization PLL synthesizer with active RC notch filters","authors":"Z. Brezović, V. Kudják","doi":"10.1109/RADIOELEK.2009.5158735","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2009.5158735","url":null,"abstract":"The linear model of Phase-locked loop with triple active RC notch filters (ARCN) which is proper for investigating of dynamic properties in the time domain and frequency domain are presented in this contribution. Also the noise analysis and noise optimization of such filters were carried out. Spectral properties and phase noise measurement on experimentally evaluated frequency synthesizer were carried out. Based on numerical simulations results has been possible to design good ARCN filters.","PeriodicalId":285174,"journal":{"name":"2009 19th International Conference Radioelektronika","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123057282","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
Discrete-time chaotic system used for secure communications 用于保密通信的离散时间混沌系统
2009 19th International Conference Radioelektronika Pub Date : 2009-04-22 DOI: 10.1109/RADIOELEK.2009.5158730
M. Stork
{"title":"Discrete-time chaotic system used for secure communications","authors":"M. Stork","doi":"10.1109/RADIOELEK.2009.5158730","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2009.5158730","url":null,"abstract":"A number of methods have been proposed for synchronizing chaotic systems. In this paper, chaos synchronization in coupled discrete-time dynamical systems is studied an used for data transmission. Especially, practical impulsive synchronization scheme for discrete time chaotic system is proposed. Simulation results finally demonstrate the effectiveness of the method. Experimental results show that chaotic system can be synchronized by impulses sampled from state variables. The impulsive synchronization can be applied to almost all chaotic and hyperchaotic systems even in the case when continuous synchronization schemes fail to work.","PeriodicalId":285174,"journal":{"name":"2009 19th International Conference Radioelektronika","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131258931","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
Binary division algorithm and implementation in VHDL 二进制除法算法及VHDL实现
2009 19th International Conference Radioelektronika Pub Date : 2009-04-22 DOI: 10.1109/RADIOELEK.2009.5158757
F. Adamec, T. Fryza
{"title":"Binary division algorithm and implementation in VHDL","authors":"F. Adamec, T. Fryza","doi":"10.1109/RADIOELEK.2009.5158757","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2009.5158757","url":null,"abstract":"This article describes a basic algorithm for a division operation. Its performance and consideration of the implementation in VHDL are discussed. There are described three possible implementations, the maximum performance in FPGAs, e.g. propagation delays and number of necessary steps to enumerate the correct result. In the conclusion the performance and necessary number of steps are compared.","PeriodicalId":285174,"journal":{"name":"2009 19th International Conference Radioelektronika","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131508412","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
Steganography systems by using CDMA techniques 采用CDMA技术的隐写系统
2009 19th International Conference Radioelektronika Pub Date : 2009-04-22 DOI: 10.1109/RADIOELEK.2009.5158731
V. Bánoci, G. Bugár, D. Levický
{"title":"Steganography systems by using CDMA techniques","authors":"V. Bánoci, G. Bugár, D. Levický","doi":"10.1109/RADIOELEK.2009.5158731","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2009.5158731","url":null,"abstract":"In this paper, we present a novel method called Code Book in steganography system based on CDMA (Code Division Multiple Access) techniques having regard to perceptibility of stego-image. These techniques and their variations are widely used in radio telecommunication systems. As it will be shown later, aptly imposed features of CDMA techniques are in consonance with imperatives claimed upon steganography systems.","PeriodicalId":285174,"journal":{"name":"2009 19th International Conference Radioelektronika","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127695449","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: 15
Modeling of logic diagnostic system knowledge base evaluation 逻辑诊断系统知识库评价建模
2009 19th International Conference Radioelektronika Pub Date : 2009-04-22 DOI: 10.1109/RADIOELEK.2009.5158742
M. Kukucka
{"title":"Modeling of logic diagnostic system knowledge base evaluation","authors":"M. Kukucka","doi":"10.1109/RADIOELEK.2009.5158742","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2009.5158742","url":null,"abstract":"Information for system design and evaluation inputs was collected from the experienced expert of thyroid diagnostics. Standardized was number of inputs and verbal expression of output diagnostic decisions (diagnosis recommendation) which would be offered by the system. Then set of basic diagnostic decisions was established. One of them was in detail explained, modeled in rules and graphically described. When the measure of detachment of decision and the general limpidity of the whole system is increased using the expert system then the endeavour lead to experimental diagnostic system creation in graphical environment suitable for this work. Creation of a part of knowledge base represented by the rules was described and the knowledge base was presented in graphical representation form of Petri net and also its diagnostic evaluation.","PeriodicalId":285174,"journal":{"name":"2009 19th International Conference Radioelektronika","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130322417","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
Usage of different color models in robust digital watermarking 不同颜色模型在鲁棒数字水印中的应用
2009 19th International Conference Radioelektronika Pub Date : 2009-04-22 DOI: 10.1109/RADIOELEK.2009.5158767
R. Ridzon, D. Levický
{"title":"Usage of different color models in robust digital watermarking","authors":"R. Ridzon, D. Levický","doi":"10.1109/RADIOELEK.2009.5158767","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2009.5158767","url":null,"abstract":"Digital watermarking represents a potential effective method for authentication and ownership rights protection in all kind of multimedia. Digital watermark is hidden information added into the content of multimedia. This paper presents one watermarking method for the color images robust against geometrical attacks. The detailed description of this method is given and some experiments by using the set of different attacks are performed. In experiment different color models were used and in experiments advantages and drawbacks of these color models were tested.","PeriodicalId":285174,"journal":{"name":"2009 19th International Conference Radioelektronika","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121722530","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
Software defined transponder architecture 软件定义的应答器架构
2009 19th International Conference Radioelektronika Pub Date : 2009-04-22 DOI: 10.1109/RADIOELEK.2009.5158751
P. Tosovsky, P. Vyskočil
{"title":"Software defined transponder architecture","authors":"P. Tosovsky, P. Vyskočil","doi":"10.1109/RADIOELEK.2009.5158751","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2009.5158751","url":null,"abstract":"Software defined radio has powerful possibilities of communication. It enables modulation and frequency independent signal transfer with a same hardware. Software defined transponder extends standard transponders by this thought. Received signal from a user is brought to the baseband, or even decoded and subsequently retranslated with a new code and modulation to other users. This method has a positive influence on the power budget. We obtain full variability of routing capabilities between the different users inside the transponder what saves the channel capacity. The proposed architecture has an additional degree of freedom, by using cross antennas. Hence, we can realize a polarization independent transceiver. The transponder architecture has a modular structure. It allows simple adaptation of the transponder to individual system requirements.","PeriodicalId":285174,"journal":{"name":"2009 19th International Conference Radioelektronika","volume":"339 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122032574","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
Bit error resilience of MPEG-2 and H.264 video compression codecs MPEG-2和H.264视频压缩编解码器的误码弹性
2009 19th International Conference Radioelektronika Pub Date : 2009-04-22 DOI: 10.1109/RADIOELEK.2009.5158774
R. Podgorny, M. Klima
{"title":"Bit error resilience of MPEG-2 and H.264 video compression codecs","authors":"R. Podgorny, M. Klima","doi":"10.1109/RADIOELEK.2009.5158774","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2009.5158774","url":null,"abstract":"In this article we present the results of tests we did on MPEG-2 and H.264 codecs in order to measure their error resilience.The data flow is being tested in its raw unprotected form which simulates reception of DVB-T in very bad conditions or severly damaged media.","PeriodicalId":285174,"journal":{"name":"2009 19th International Conference Radioelektronika","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125440721","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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