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20th International Conference Radioelektronika 2010最新文献

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Real time processing in educational practice with help of TMS320C6713 DSP starter kit TMS320C6713 DSP入门工具包在实时处理教学实践中的应用
20th International Conference Radioelektronika 2010 Pub Date : 2010-04-19 DOI: 10.1109/RADIOELEK.2010.5478581
T. Fryza
{"title":"Real time processing in educational practice with help of TMS320C6713 DSP starter kit","authors":"T. Fryza","doi":"10.1109/RADIOELEK.2010.5478581","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2010.5478581","url":null,"abstract":"In this paper the application of fundamental algorithms for signal processing in educational domain are presented. The original motivation of the contribution is to show the possibilities of digital signal processors programming in education practice. The aim is approximate the author's experience with university students teaching. Mainly the using of floating-point digital signal processors to implement the C and assembly source code is outlined. The practical experiments bring students the deeper understanding of the microprocessor technique principles as well as the signal processing algorithms. In the text the short presentation of students' experiments with DSPs is outlined. Moreover the impact of programming in high-level and low-level languages, followed by the optimizing is proved as well.","PeriodicalId":398720,"journal":{"name":"20th International Conference Radioelektronika 2010","volume":"16 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":"123105732","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
Influence of mirroring of current output responses through grounded passive elements 通过接地无源元件镜像电流输出响应的影响
20th International Conference Radioelektronika 2010 Pub Date : 2010-04-19 DOI: 10.1109/RADIOELEK.2010.5478562
R. Sotner, J. Slezák, T. Dostál
{"title":"Influence of mirroring of current output responses through grounded passive elements","authors":"R. Sotner, J. Slezák, T. Dostál","doi":"10.1109/RADIOELEK.2010.5478562","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2010.5478562","url":null,"abstract":"The paper deals with a necessity of copping the current output responses flowing trough grounded passive elements in the modern active biquad working in the current mode. It is important to use another active block with low input resistance (current follower, current conveyor, etc.) for the impedance matching. This problem is demonstrated in the simple biquadratic structure using two modern functional blocks and two capacitors. Theoretical analysis of the transfer function (Matlab) is compared with the resulting simulations, where macro models of commercially available devices are used.","PeriodicalId":398720,"journal":{"name":"20th International Conference Radioelektronika 2010","volume":"25 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":"122372576","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
The 2D spreading based communication systems implementation using USRP 采用USRP实现基于二维传播的通信系统
20th International Conference Radioelektronika 2010 Pub Date : 2010-04-19 DOI: 10.1109/RADIOELEK.2010.5478572
J. Blumenstein, Z. Fedra
{"title":"The 2D spreading based communication systems implementation using USRP","authors":"J. Blumenstein, Z. Fedra","doi":"10.1109/RADIOELEK.2010.5478572","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2010.5478572","url":null,"abstract":"This paper deals with issues related with implementation of Variable Spreading Factor Orthogonal Frequency and Code Division Multiplexing (VSF-OFCDM) systems using Universal Software Radio Peripheral (USRP). Comparison of simulated and with USRP hardware achieved results of VSF-OFCDM systems with various 2D spreading factors (SF) are being done. Simulation of complete communication chain is being done but only the transmitter part was implemented and investigated using USRP.","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":"129744500","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
Towards reliable speech recognition in operating room noise environment 迈向手术室噪声环境下可靠的语音识别
20th International Conference Radioelektronika 2010 Pub Date : 2010-04-19 DOI: 10.1109/RADIOELEK.2010.5478597
P. Zelinka, M. Sigmund
{"title":"Towards reliable speech recognition in operating room noise environment","authors":"P. Zelinka, M. Sigmund","doi":"10.1109/RADIOELEK.2010.5478597","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2010.5478597","url":null,"abstract":"This paper describes several practical steps for accurate statistical modeling of a known acoustical noise environment to attain good performance of a small vocabulary speech recognizer for isolated words based on whole-word hidden Markov models. Hierarchical segmentation based on Bayes information criterion and k-means clustering followed by split-merge Gaussian mixture model training were utilized for noise model estimation. Parallel model combination technique produces final noise-corrupted speech models for a small group of speakers. Experiments were carried out on a real operating room ambient noise recorded during a neurosurgery at the University Hospital in Marburg.","PeriodicalId":398720,"journal":{"name":"20th International Conference Radioelektronika 2010","volume":"65 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":"131073748","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
Test frequency selection for band-pass filters 测试频率选择带通滤波器
20th International Conference Radioelektronika 2010 Pub Date : 2010-04-19 DOI: 10.1109/RADIOELEK.2010.5478565
Z. Kincl, Z. Kolka
{"title":"Test frequency selection for band-pass filters","authors":"Z. Kincl, Z. Kolka","doi":"10.1109/RADIOELEK.2010.5478565","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2010.5478565","url":null,"abstract":"The paper discusses the selection of an appropriate set of test frequencies in the multifrequency parametric fault diagnosis of band-pass filters. Selected frequencies depend on the filter quality factor Q and they are the same for all groups of testable components. The selection of single frequency and double frequencies is shown for the second-order band-pass filter in the current-mode. The method can be used either to locate faulty components or to estimate a priori unknown parasitic parameters of active circuit elements.","PeriodicalId":398720,"journal":{"name":"20th International Conference Radioelektronika 2010","volume":"45 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":"132647248","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
DVB-S/S2 satellite television broadcasting measurement and comparison DVB-S/S2卫星电视广播测量与比较
20th International Conference Radioelektronika 2010 Pub Date : 2010-04-19 DOI: 10.1109/RADIOELEK.2010.5478588
Balázs Lábsky, T. Kratochvil
{"title":"DVB-S/S2 satellite television broadcasting measurement and comparison","authors":"Balázs Lábsky, T. Kratochvil","doi":"10.1109/RADIOELEK.2010.5478588","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2010.5478588","url":null,"abstract":"This paper deals with an experimental measurement of real DVB-S and DVB-S2 signal. As a digital satellite signal source were used a 90cm diametric parabolic antenna in top of DREL BUT destined to satellite ASTRA 3A 23,5° East longitude for DVB-S signal and to satellite ASTRA 1E 19,2° East longitude for DVB-S2 signal. Antenna measurement system Kathrein MSK 200 was used as a test receiver for the measurement with a set top box Humax HD 2000-CI. Finally, obtained results are evaluated, compared and commented.","PeriodicalId":398720,"journal":{"name":"20th International Conference Radioelektronika 2010","volume":"7 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":"126672253","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
Nonminimal-phase feedback circuits in oscillators 振荡器中的非最小相位反馈电路
20th International Conference Radioelektronika 2010 Pub Date : 2010-04-19 DOI: 10.1109/RADIOELEK.2010.5478557
I. Balaz, Marcel Pichna, V. Stofanik, M. Minárik, E. Cocherová
{"title":"Nonminimal-phase feedback circuits in oscillators","authors":"I. Balaz, Marcel Pichna, V. Stofanik, M. Minárik, E. Cocherová","doi":"10.1109/RADIOELEK.2010.5478557","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2010.5478557","url":null,"abstract":"This article is intended to compare some nonminimal and minimal-phase (MPS) RC feedback systems from their argument (phase vs. frequency) characteristics point of view. There will be shown the nonminimal-phase systems (NPS) as feedback circuits with active element (e. g. OPAMP), which are able to generate periodic (quasisinusoidal) signals when some differences of MPS have been concerned and fulfilled.","PeriodicalId":398720,"journal":{"name":"20th International Conference Radioelektronika 2010","volume":"11 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":"129714333","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
Simulation of packet losses in video transfers using real-time transport protocol 使用实时传输协议的视频传输中丢包的模拟
20th International Conference Radioelektronika 2010 Pub Date : 2010-04-19 DOI: 10.1109/RADIOELEK.2010.5478577
J. Mochnáč, S. Marchevsky, Pavol Kocan
{"title":"Simulation of packet losses in video transfers using real-time transport protocol","authors":"J. Mochnáč, S. Marchevsky, Pavol Kocan","doi":"10.1109/RADIOELEK.2010.5478577","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2010.5478577","url":null,"abstract":"Multimedia content transmitted over unreliable environment, like wireless channels or in generally any network with unreliable transport protocol, is always subject to packet loss due to network congestion and channel noise. By using compressed video, errors could propagate to the subsequent frames with resulting worse video quality. Therefore it is necessary to study impact of packet loss on overall video quality. First step in such study is creation of network models. The most popular approach is network modeling using Markov chains. In our paper we have analyzed in which way have occurred packet losses during transmission of video through wired and also wireless network.","PeriodicalId":398720,"journal":{"name":"20th International Conference Radioelektronika 2010","volume":"6 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":"128302949","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
Cognitive radio-based urban wireless broadband in unused TV bands 在未使用的电视频带中基于认知无线电的城市无线宽带
20th International Conference Radioelektronika 2010 Pub Date : 2010-04-19 DOI: 10.1109/RADIOELEK.2010.5478549
S. Kawade, M. Nekovee
{"title":"Cognitive radio-based urban wireless broadband in unused TV bands","authors":"S. Kawade, M. Nekovee","doi":"10.1109/RADIOELEK.2010.5478549","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2010.5478549","url":null,"abstract":"This paper describes an approach for providing wireless broadband access in urban areas by deploying the cognitive radio technology operating in geographically unused TV bands. It is shown, through system simulations performed for real-life urban settings, that a wireless network equivalent to that of cellular operators' next generation mobile broadband (based, e.g., on HSPA or LTE) can be rolled out without any investment in new spectrum and at significantly lower infrastructure costs.","PeriodicalId":398720,"journal":{"name":"20th International Conference Radioelektronika 2010","volume":"76 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":"122548447","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
Numerical inversion of 3D Laplace transforms for weakly nonlinear systems solution 弱非线性系统三维拉普拉斯变换的数值反演
20th International Conference Radioelektronika 2010 Pub Date : 2010-04-19 DOI: 10.1109/RADIOELEK.2010.5478552
L. Brancík
{"title":"Numerical inversion of 3D Laplace transforms for weakly nonlinear systems solution","authors":"L. Brancík","doi":"10.1109/RADIOELEK.2010.5478552","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2010.5478552","url":null,"abstract":"The paper deals with a technique for numerical inversion of three-dimensional Laplace transforms (3D NILT) being based on the FFT & IFFT in conjunction with the quotient-difference algorithm. This method generalizes 2D NILT technique developed formerly to three variables. Especially an error analysis has resulted in a new formula equating a relative error of the method to paths of the integration of triple Bromwich integral. To evaluate triple infinite sums obtained by numerical integration, the partial inversion technique is used. The method was algorithmized in Matlab language environment and applied for solving a response of a weakly nonlinear circuit via Volterra series expansion to demonstrate its practical usefulness.","PeriodicalId":398720,"journal":{"name":"20th International Conference Radioelektronika 2010","volume":"5 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":"115511653","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
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