发布求助
文献互助 智能选刊 最新文献

2009 19th International Conference Radioelektronika最新文献

筛选
英文 中文
Free space optical link range determination on the basis of meteorological visibility 基于气象能见度的自由空间光链路距离确定
2009 19th International Conference Radioelektronika Pub Date : 2009-04-22 DOI: 10.1109/RADIOELEK.2009.5158794
L. Dordová, O. Wilfert
{"title":"Free space optical link range determination on the basis of meteorological visibility","authors":"L. Dordová, O. Wilfert","doi":"10.1109/RADIOELEK.2009.5158794","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2009.5158794","url":null,"abstract":"This work is focused on the free space optical links and the laser beam transmission via atmospheric transmission media. Meteorological visibility is presented in the work as well as Kim and Kruse models for determination of atmospheric attenuation. Model of the free space optical link is briefly described in the paper and typical parameters of the optical wireless link are mentioned. Conception of communication margin is introduced in relation to maximal range of optical wireless link. Communication wavelengths 850 nm and 1550 nm are taken into account in attenuation characteristics calculation.","PeriodicalId":285174,"journal":{"name":"2009 19th International Conference Radioelektronika","volume":"108 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":"123119653","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
Matlab simulation of the DVB-T transmission DVB-T传输的Matlab仿真
2009 19th International Conference Radioelektronika Pub Date : 2009-04-22 DOI: 10.1109/RADIOELEK.2009.5158779
R. Stukavec, T. Kratochvil
{"title":"Matlab simulation of the DVB-T transmission","authors":"R. Stukavec, T. Kratochvil","doi":"10.1109/RADIOELEK.2009.5158779","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2009.5158779","url":null,"abstract":"This paper deals with a Matlab application currently being developed to simulate DVB-T transmission in various transmission channels. The application structure and its functions are described. The aim was to implement all the functional blocks as specified in the DVB-T specification. Dependence of BER on C/N ratio as a result of the simulation in the Gaussian channel is graphically expressed and compared to the results of the laboratory measurement. The reference measurement was performed using Rohde & Schwarz SFU (broadcast test system) unit as the transmitter and Kathrein MSK-33 DVB-T test receiver. Finally, obtained results are discussed.","PeriodicalId":285174,"journal":{"name":"2009 19th International Conference Radioelektronika","volume":"21 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":"127362656","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
The characteristics of the 2D spreading based communication systems 二维扩频通信系统的特点
2009 19th International Conference Radioelektronika Pub Date : 2009-04-22 DOI: 10.1109/RADIOELEK.2009.5158770
J. Blumenstein, Z. Fedra
{"title":"The characteristics of the 2D spreading based communication systems","authors":"J. Blumenstein, Z. Fedra","doi":"10.1109/RADIOELEK.2009.5158770","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2009.5158770","url":null,"abstract":"This paper deals with characteristics and theory of code division multiple access (CDMA), orthogonal frequency division multiplexing (OFDM) and variable spreading factor orthogonal ferquency and code division multiplexing (VSF-OFCDM) systems. As comparison and evaluation of VSF-OFCDM with various 2D spreading factor (SF) as frequency and time dispersive transmission channel according to ETSI standard (typical rural area and warehouse enviroment) is being done.","PeriodicalId":285174,"journal":{"name":"2009 19th International Conference Radioelektronika","volume":"28 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":"125364669","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
The comparision of some properties for various digital CNN 对各种数字CNN的一些特性进行比较
2009 19th International Conference Radioelektronika Pub Date : 2009-04-22 DOI: 10.1109/RADIOELEK.2009.5158766
E. Raschman, D. Durackova
{"title":"The comparision of some properties for various digital CNN","authors":"E. Raschman, D. Durackova","doi":"10.1109/RADIOELEK.2009.5158766","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2009.5158766","url":null,"abstract":"Our contribution paper deals with comparison of the new architecture of CNN with another two digital networks. The most area on a chip occupy multipliers, therefore we proposed CNN network, where multiplication in the input with weight is realized by AND block , while multiplied signal is special distributed in the time. All the designed networks are digital and we compare the parameters as the speed and chip area consumption. From the comparison we can recognize that our proposed digital CNN network is the best from the other ones.","PeriodicalId":285174,"journal":{"name":"2009 19th International Conference Radioelektronika","volume":"100 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":"115547113","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
The SMS satellite system design 卫星短信系统的设计
2009 19th International Conference Radioelektronika Pub Date : 2009-04-22 DOI: 10.1109/RADIOELEK.2009.5158750
J. Rumanek, J. Sebesta
{"title":"The SMS satellite system design","authors":"J. Rumanek, J. Sebesta","doi":"10.1109/RADIOELEK.2009.5158750","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2009.5158750","url":null,"abstract":"The paper deals about short message system design. The main parts of design are energy balance and the suitable coding implementing. This system will be developed for radio amateurs' community.","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":"121581088","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
Classifiability analysis of indications by eddy-current testing of nuclear power plant heat-exchanger tube 核电站热交换器管涡流试验指标的分类分析
2009 19th International Conference Radioelektronika Pub Date : 2009-04-22 DOI: 10.1109/RADIOELEK.2009.5158772
J. Grman, Ĺ. Syrová
{"title":"Classifiability analysis of indications by eddy-current testing of nuclear power plant heat-exchanger tube","authors":"J. Grman, Ĺ. Syrová","doi":"10.1109/RADIOELEK.2009.5158772","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2009.5158772","url":null,"abstract":"The contribution treats the topic of data transformation for classification of indications in the field of non-destructive defectoscopy by eddy-currents. Four algorithms for transformation of measured signal indications into suitable vectors of features will be presented. The contribution concentrates on the choice of coefficients from single or multiple vectors of features to define new data representation suitable for classification. Important is classification success and minimal dimension of result vector of features.","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":"125751742","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
Low-pass cascade filters with high attenuation rate in the stopband 阻带内具有高衰减率的低通级联滤波器
2009 19th International Conference Radioelektronika Pub Date : 2009-04-22 DOI: 10.1109/RADIOELEK.2009.5158764
V. Micha, J. Sedlácek, K. Hájek
{"title":"Low-pass cascade filters with high attenuation rate in the stopband","authors":"V. Micha, J. Sedlácek, K. Hájek","doi":"10.1109/RADIOELEK.2009.5158764","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2009.5158764","url":null,"abstract":"In this paper, we present two biquadratic structures for cascade filter design, which are intended to provide high attenuation rate in the stopband area of frequency transfer characteristic. The filters optimized in this way can reach better electrical performances, such as higher maximal cut-off frequency or dynamic range, even with conventional (low power consumption) active devices. We present a modification of the well-known Sallen-Key filter and a biquadratic filter based on the second generation current conveyor CCII-. Presented approach relies on the elimination of parasitic transfer zeros in the real transfer function, which are caused by the non-ideal parameters of real active elements. Their impact is eliminated by unconventional definition of the filter output.","PeriodicalId":285174,"journal":{"name":"2009 19th International Conference Radioelektronika","volume":"40 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":"116198838","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
New reliability growth model 新的可靠性增长模型
2009 19th International Conference Radioelektronika Pub Date : 2009-04-22 DOI: 10.1109/RADIOELEK.2009.5158740
Z. Krajcuskova
{"title":"New reliability growth model","authors":"Z. Krajcuskova","doi":"10.1109/RADIOELEK.2009.5158740","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2009.5158740","url":null,"abstract":"The reliability growth model (RGM) is a very specific tool used during the development phase of electronic devices and software products. The new unconventional reliability growth models are based on the homogenity testing of different Poisson process characteristics. This makes it possible to find the time frame for finishing the technological constructing operations for further reliability growth in the next design of an electronic object. In this paper we review one new unconventional reliability growth model of electronic devices.","PeriodicalId":285174,"journal":{"name":"2009 19th International Conference Radioelektronika","volume":"33 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":"123663816","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
On MC-CDMA transmission system performance at nonlinear high power amplifier of transmitter over frequency selective fading channel 频率选择性衰落信道下非线性高功率发射机放大器的MC-CDMA传输系统性能研究
2009 19th International Conference Radioelektronika Pub Date : 2009-04-22 DOI: 10.1109/RADIOELEK.2009.5158719
J. Gazda, P. Drotár, D. Kocur, P. Galajda
{"title":"On MC-CDMA transmission system performance at nonlinear high power amplifier of transmitter over frequency selective fading channel","authors":"J. Gazda, P. Drotár, D. Kocur, P. Galajda","doi":"10.1109/RADIOELEK.2009.5158719","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2009.5158719","url":null,"abstract":"The study in this paper underlines the importance of correct joint selection of the spreading codes at the transmitter side and detector at the receiver side in the uplink multi-carrier code division multiple access transmission system model (MC-CDMA) in the presence of frequency selective fading environment and nonlinear distortion due to high power amplifier (HPA). For the precise overall performance, different spreading sequences (Walsh code, Gold code, orthogonal Gold code, Golay code and Zadoff-Chu code) and different kinds of receivers (minimum mean-square error receiver (MMSE-MUD) and microstatistic multi-user receiver (MSF-MUD)) are considered in this paper. In order to show the benefits of applying MSF-MUD over MMSE-MUD in presented environment, different computer simulations have been arranged. The results of our analysis will show, that the application of MSF-MUD in combination with Golay codes can outperform significantly the other tested spreading codes and receivers in AWGN as well as in frequency selective fading environment.","PeriodicalId":285174,"journal":{"name":"2009 19th International Conference Radioelektronika","volume":"10 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":"128447651","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
Portable AC current source 便携式交流电流源
2009 19th International Conference Radioelektronika Pub Date : 2009-04-22 DOI: 10.1109/RADIOELEK.2009.5158721
J. Hribik, M. Hruškovic, P. Fuchs
{"title":"Portable AC current source","authors":"J. Hribik, M. Hruškovic, P. Fuchs","doi":"10.1109/RADIOELEK.2009.5158721","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2009.5158721","url":null,"abstract":"Two versions of a portable AC current source with the frequency of the power network are presented. The output current is adjustable in steps from hundreds of mA up to 60 A. Fine current adjustment inside every step is also possible. The phase shift of the output current −60°, 0° and +60° is selectable. Equations for the calculations of the necessary elements to set the desired phase shift have been derived. Some measured results of a constructed sample to be manufactured are also given. The current source is intended to be used for on-site electricity meters accuracy testing without the necessity to bring them into the test laboratory.","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":"130090445","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
下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：604180095
Book学术官方微信