Pub Date : 2015-04-21DOI: 10.1109/RADIOELEK.2015.7129016
Pavel Jetenský
This paper presents a Circular scan fingertip detection algorithm for accurate calculation of fingertip coordinates based on a hand image captured from a depth sensor. It properly analyzes both straight and bent fingers and is rotation invariant. The algorithm can be used for development of user interfaces based on human gesture analysis, such as a multi-modal user interface TouchTable. Advantages of the proposed algorithm over other methods of fingertip detection are described. The paper also introduces DepthTip, a public dataset that can be used to evaluate accuracy of fingertip detection algorithms.
{"title":"Human hand image analysis extracting finger coordinates using circular scanning","authors":"Pavel Jetenský","doi":"10.1109/RADIOELEK.2015.7129016","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2015.7129016","url":null,"abstract":"This paper presents a Circular scan fingertip detection algorithm for accurate calculation of fingertip coordinates based on a hand image captured from a depth sensor. It properly analyzes both straight and bent fingers and is rotation invariant. The algorithm can be used for development of user interfaces based on human gesture analysis, such as a multi-modal user interface TouchTable. Advantages of the proposed algorithm over other methods of fingertip detection are described. The paper also introduces DepthTip, a public dataset that can be used to evaluate accuracy of fingertip detection algorithms.","PeriodicalId":193275,"journal":{"name":"2015 25th International Conference Radioelektronika (RADIOELEKTRONIKA)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123391675","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}
Pub Date : 2015-04-21DOI: 10.1109/RADIOELEK.2015.7128970
J. Horalek, R. Cimler, V. Sobeslav
Utilization of virtualization and cloud computing technologies is very topical. A large number different of technologies, tools and software solutions exists. Successful adoption of this kind of solution may effectively support the education of specialized topics such as programming, operating system, computer networks, security and many others. This solutions offers remote access, automated deployment of infrastructure, API or virtualized study environment etc. The goal of this paper is to explore the broad number of virtualization technologies and proposed the solution which deals with the analysis, design and practical implementation of the virtual laboratory that can serve as an educational tool.
{"title":"Virtualization solutions for higher education purposes","authors":"J. Horalek, R. Cimler, V. Sobeslav","doi":"10.1109/RADIOELEK.2015.7128970","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2015.7128970","url":null,"abstract":"Utilization of virtualization and cloud computing technologies is very topical. A large number different of technologies, tools and software solutions exists. Successful adoption of this kind of solution may effectively support the education of specialized topics such as programming, operating system, computer networks, security and many others. This solutions offers remote access, automated deployment of infrastructure, API or virtualized study environment etc. The goal of this paper is to explore the broad number of virtualization technologies and proposed the solution which deals with the analysis, design and practical implementation of the virtual laboratory that can serve as an educational tool.","PeriodicalId":193275,"journal":{"name":"2015 25th International Conference Radioelektronika (RADIOELEKTRONIKA)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129597078","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}
Pub Date : 2015-04-21DOI: 10.1109/RADIOELEK.2015.7129035
R. Mego, T. Fryza
This paper is dealing with the implementation of the signal processing algorithms, specifically the Fast Fourier Transform and the matrix multiplication, using the new tool for mapping instructions on functional units of the processor. The tool is using the signal-flow based description of the algorithm instead of the sequential notation of the program execution. The selected target processor is a multi-core digital signal processor based on the very long instruction word architecture. The final assembly code is analyzed in terms of utilization of the functional units and general purpose registers.
{"title":"Efficiency of the signal processing algorithms using signal-flow based mapping tool","authors":"R. Mego, T. Fryza","doi":"10.1109/RADIOELEK.2015.7129035","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2015.7129035","url":null,"abstract":"This paper is dealing with the implementation of the signal processing algorithms, specifically the Fast Fourier Transform and the matrix multiplication, using the new tool for mapping instructions on functional units of the processor. The tool is using the signal-flow based description of the algorithm instead of the sequential notation of the program execution. The selected target processor is a multi-core digital signal processor based on the very long instruction word architecture. The final assembly code is analyzed in terms of utilization of the functional units and general purpose registers.","PeriodicalId":193275,"journal":{"name":"2015 25th International Conference Radioelektronika (RADIOELEKTRONIKA)","volume":"99 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117224060","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}
Pub Date : 2015-04-21DOI: 10.1109/RADIOELEK.2015.7129030
E. Klejmova
This paper deals with comparing methods for time-frequency analysis such as time-frequency Fourier transform representation, multiple window method using Slepian sequences, time-frequency varying autoregressive process estimation and continuous wavelet analysis. To test their performance we apply these methods first on a simulated signal then on real recorded data from a metal plate acceleration by detonation products. For the autoregressive process we perform optimization of the lag order. The results are presented in graphical form and briefly discussed. Taking these results into account, combining the autoregressive process and wavelet transform is suggested.
{"title":"Comparison of parametric and non parametric methods for signal time-frequency description","authors":"E. Klejmova","doi":"10.1109/RADIOELEK.2015.7129030","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2015.7129030","url":null,"abstract":"This paper deals with comparing methods for time-frequency analysis such as time-frequency Fourier transform representation, multiple window method using Slepian sequences, time-frequency varying autoregressive process estimation and continuous wavelet analysis. To test their performance we apply these methods first on a simulated signal then on real recorded data from a metal plate acceleration by detonation products. For the autoregressive process we perform optimization of the lag order. The results are presented in graphical form and briefly discussed. Taking these results into account, combining the autoregressive process and wavelet transform is suggested.","PeriodicalId":193275,"journal":{"name":"2015 25th International Conference Radioelektronika (RADIOELEKTRONIKA)","volume":"144 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133860702","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}
Pub Date : 2015-04-21DOI: 10.1109/RADIOELEK.2015.7129042
L. Kupka
In the paper the studies of the controller design of active driver's seat are presented. The driver seat with the air spring as the actuator is described as nonlinear lumped system with transportation delay. The linearization of this nonlinear dynamic system is used for discrete linear state space controller design. The behavior of this controller with linear continuous estimator of nonlinear system has been verified in the laboratory.
{"title":"Controller design of the active driver's seat","authors":"L. Kupka","doi":"10.1109/RADIOELEK.2015.7129042","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2015.7129042","url":null,"abstract":"In the paper the studies of the controller design of active driver's seat are presented. The driver seat with the air spring as the actuator is described as nonlinear lumped system with transportation delay. The linearization of this nonlinear dynamic system is used for discrete linear state space controller design. The behavior of this controller with linear continuous estimator of nonlinear system has been verified in the laboratory.","PeriodicalId":193275,"journal":{"name":"2015 25th International Conference Radioelektronika (RADIOELEKTRONIKA)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131605182","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}
Pub Date : 2015-04-21DOI: 10.1109/RADIOELEK.2015.7128994
J. Pančík, M. Pančík
This article is focused on the design of low cost electronics and software solution for the radar front-end electronics based on the Universal Software Radio Peripheral (USRP) for short range FMCW (Frequency Modulated - Continuous Wave) Synthetic Aperture Radar (SAR) system. We developed the radar front-end electronics with USRP type N210 from Ettus Research. As first, we describe requirements for SAR front-end, as second we in the detail describe the system process synchronization, the primary raw signal processing and necessary USRP FPGA program modification. Also we describe by us developed PC control program for system synchronization and raw data transfer control between SAR system high frequency part, USRP radar front-end and measurement PC. Finally, the measurement arrangement of the SAR system testing, real photo of all system and several results from the tests we show.
{"title":"Hardware and software front-end based on the USRP for experimental X-band Synthetic Aperture Radar","authors":"J. Pančík, M. Pančík","doi":"10.1109/RADIOELEK.2015.7128994","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2015.7128994","url":null,"abstract":"This article is focused on the design of low cost electronics and software solution for the radar front-end electronics based on the Universal Software Radio Peripheral (USRP) for short range FMCW (Frequency Modulated - Continuous Wave) Synthetic Aperture Radar (SAR) system. We developed the radar front-end electronics with USRP type N210 from Ettus Research. As first, we describe requirements for SAR front-end, as second we in the detail describe the system process synchronization, the primary raw signal processing and necessary USRP FPGA program modification. Also we describe by us developed PC control program for system synchronization and raw data transfer control between SAR system high frequency part, USRP radar front-end and measurement PC. Finally, the measurement arrangement of the SAR system testing, real photo of all system and several results from the tests we show.","PeriodicalId":193275,"journal":{"name":"2015 25th International Conference Radioelektronika (RADIOELEKTRONIKA)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115205324","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}
Pub Date : 2015-04-21DOI: 10.1109/RADIOELEK.2015.7129053
L. Brancík, E. Kolárová, Nawfal Al-Zubaidi R-Smith
This paper is focused on the development of a method to determine variances of the stochastic responses in transmission line models with random excitations. It is based on the theory of stochastic differential equations (SDE), namely a system of vector linear SDEs with additive noise is formulated to be prepared to simulate respective stochastic trajectories. One possibility to get the moments of the stochastic process is to determine sample statistics from a set of individual trajectories. This is, however, rather time consuming, and it's benefit when compared to common methods is not so obvious. In this paper differential equations for getting directly the first two stochastic response moments of transmission line models under randomly varying excitations are formulated and solved. A verification is performed via the above stated approach, while the Student's t-distribution can directly be used to determine respective confidence intervals in case of an additive noise. All simulations have been performed in a Matlab language environment.
{"title":"SDE-based variance simulation in transmission line models with random excitations","authors":"L. Brancík, E. Kolárová, Nawfal Al-Zubaidi R-Smith","doi":"10.1109/RADIOELEK.2015.7129053","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2015.7129053","url":null,"abstract":"This paper is focused on the development of a method to determine variances of the stochastic responses in transmission line models with random excitations. It is based on the theory of stochastic differential equations (SDE), namely a system of vector linear SDEs with additive noise is formulated to be prepared to simulate respective stochastic trajectories. One possibility to get the moments of the stochastic process is to determine sample statistics from a set of individual trajectories. This is, however, rather time consuming, and it's benefit when compared to common methods is not so obvious. In this paper differential equations for getting directly the first two stochastic response moments of transmission line models under randomly varying excitations are formulated and solved. A verification is performed via the above stated approach, while the Student's t-distribution can directly be used to determine respective confidence intervals in case of an additive noise. All simulations have been performed in a Matlab language environment.","PeriodicalId":193275,"journal":{"name":"2015 25th International Conference Radioelektronika (RADIOELEKTRONIKA)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115776439","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}
Pub Date : 2015-04-21DOI: 10.1109/RADIOELEK.2015.7129045
Lettl Jiří, Karlovský Pavel
The paper deals with development of the induction motor drive direct torque control (DTC) based on the next step voltage vector prediction. The principle of the method is explained and the system mathematical description is provided. The derived control algorithm is implemented both in the simulation software MatLab/Simulink and on the real induction motor drive with dSPACE control system. Simulated and measured results in steady states and transients are presented.
{"title":"Induction motor drive predictive direct torque control method","authors":"Lettl Jiří, Karlovský Pavel","doi":"10.1109/RADIOELEK.2015.7129045","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2015.7129045","url":null,"abstract":"The paper deals with development of the induction motor drive direct torque control (DTC) based on the next step voltage vector prediction. The principle of the method is explained and the system mathematical description is provided. The derived control algorithm is implemented both in the simulation software MatLab/Simulink and on the real induction motor drive with dSPACE control system. Simulated and measured results in steady states and transients are presented.","PeriodicalId":193275,"journal":{"name":"2015 25th International Conference Radioelektronika (RADIOELEKTRONIKA)","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122898556","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}
Pub Date : 2015-04-21DOI: 10.1109/RADIOELEK.2015.7129038
J. Hallon, M. Bittera, K. Kovac
This paper deals with analysis of effect of a test site geometrical arrangement on the test validity when immunity test of large systems against radiated radiofrequency electromagnetic field is performed. Such a system often equipped with complex cabling cannot be arranged in accordance with normalized setup described by a standard. This leads to lower test validity. The analysis is focused on effect of cabling arrangement on induced current flowing through the cabling. Results obtained by numerical simulations are compared with measurements.
{"title":"Effect of test site arrangement for large systems on test validity according to EN 61000-4-3","authors":"J. Hallon, M. Bittera, K. Kovac","doi":"10.1109/RADIOELEK.2015.7129038","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2015.7129038","url":null,"abstract":"This paper deals with analysis of effect of a test site geometrical arrangement on the test validity when immunity test of large systems against radiated radiofrequency electromagnetic field is performed. Such a system often equipped with complex cabling cannot be arranged in accordance with normalized setup described by a standard. This leads to lower test validity. The analysis is focused on effect of cabling arrangement on induced current flowing through the cabling. Results obtained by numerical simulations are compared with measurements.","PeriodicalId":193275,"journal":{"name":"2015 25th International Conference Radioelektronika (RADIOELEKTRONIKA)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123316649","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}
Pub Date : 2015-04-21DOI: 10.1109/RADIOELEK.2015.7129040
D. Lekomtcev, Edward Kasem, R. Maršálek
This paper presents the developed MATLAB-based simulation environment used to evaluate the cooperative spectrum sensing in the simulated channel conditions. Four different channel models can be set up between the primary user and individual secondary users: PedA, PedB, VehA and VehB models. Two types of detectors - the energy detector and the Kolmogorov-Smirnov-based statistical detector have been implemented and then used for the evaluation on the two types of transmitted signals - the analogue FM signal and the digital 8PSK signal. The simulator has also been used in order to demonstrate the effectiveness of the cooperative approach over the spectrum sensing via the single devices.
{"title":"Matlab-based simulator of cooperative spectrum sensing in real channel conditions","authors":"D. Lekomtcev, Edward Kasem, R. Maršálek","doi":"10.1109/RADIOELEK.2015.7129040","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2015.7129040","url":null,"abstract":"This paper presents the developed MATLAB-based simulation environment used to evaluate the cooperative spectrum sensing in the simulated channel conditions. Four different channel models can be set up between the primary user and individual secondary users: PedA, PedB, VehA and VehB models. Two types of detectors - the energy detector and the Kolmogorov-Smirnov-based statistical detector have been implemented and then used for the evaluation on the two types of transmitted signals - the analogue FM signal and the digital 8PSK signal. The simulator has also been used in order to demonstrate the effectiveness of the cooperative approach over the spectrum sensing via the single devices.","PeriodicalId":193275,"journal":{"name":"2015 25th International Conference Radioelektronika (RADIOELEKTRONIKA)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123599341","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}
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