Pub Date : 2015-04-21DOI: 10.1109/RADIOELEK.2015.7129009
Pavel Kríz, Filip Malý
The Google Android platform supports provisioning of packaged applications to an Android device. However, an existing approach requires user's interaction during the installation of a new application or its modules. We present a new approach to dynamic modules loading which enables provisioning of new modules to Android device dynamically without the interaction with the user. It will allow complex applications to adapt to the surrounding conditions and requirements of the user by downloading additional code from a server or a neighboring peer device. In our solution we propose to replace the default application class-loader with a custom one while employing some existing mechanisms of class-loading from APK packages at the Android platform.
{"title":"Provisioning of application modules to Android devices","authors":"Pavel Kríz, Filip Malý","doi":"10.1109/RADIOELEK.2015.7129009","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2015.7129009","url":null,"abstract":"The Google Android platform supports provisioning of packaged applications to an Android device. However, an existing approach requires user's interaction during the installation of a new application or its modules. We present a new approach to dynamic modules loading which enables provisioning of new modules to Android device dynamically without the interaction with the user. It will allow complex applications to adapt to the surrounding conditions and requirements of the user by downloading additional code from a server or a neighboring peer device. In our solution we propose to replace the default application class-loader with a custom one while employing some existing mechanisms of class-loading from APK packages at the Android platform.","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":"130094546","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.2015.7129067
V. Tykhonov, N. Kudriavtseva, K. Netrebenko, P. Chmelar
The higher orders spectra analysis for non-Gaussian process spectrum estimation in the mix with Gaussian correlated interference are studied in the paper. The received expressions for parametric spectral estimation of higher orders are used for non-Gaussian processes spectra estimation that can be described by generic autoregressive models. The comparative analysis of the received parametric spectral third order estimations with similar estimations calculated using known methods based on Fourier transform was made.
{"title":"The non-Gaussian signals' spectra estimation against a background of Gaussian correlated interference","authors":"V. Tykhonov, N. Kudriavtseva, K. Netrebenko, P. Chmelar","doi":"10.1109/RADIOELEK.2015.7129067","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2015.7129067","url":null,"abstract":"The higher orders spectra analysis for non-Gaussian process spectrum estimation in the mix with Gaussian correlated interference are studied in the paper. The received expressions for parametric spectral estimation of higher orders are used for non-Gaussian processes spectra estimation that can be described by generic autoregressive models. The comparative analysis of the received parametric spectral third order estimations with similar estimations calculated using known methods based on Fourier transform was made.","PeriodicalId":193275,"journal":{"name":"2015 25th International Conference Radioelektronika (RADIOELEKTRONIKA)","volume":"79 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":"116014362","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.2015.7128993
M. Hrabina, M. Sigmund
This paper describes development of reliable gunshot detection system with emphasis on low power consumption for use in counter-poacher devices primarily protecting elephants in Africa. Intended system will work as a binary detector of gunfire without further classification of used fire-arm. Dominance of right gunshot detection over false alarms is crucial. Proposed recognition system is based on linear predictive coefficients, correlation against template and comparison of spectral energy in sub-bands.
{"title":"Acoustical detection of gunshots","authors":"M. Hrabina, M. Sigmund","doi":"10.1109/RADIOELEK.2015.7128993","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2015.7128993","url":null,"abstract":"This paper describes development of reliable gunshot detection system with emphasis on low power consumption for use in counter-poacher devices primarily protecting elephants in Africa. Intended system will work as a binary detector of gunfire without further classification of used fire-arm. Dominance of right gunshot detection over false alarms is crucial. Proposed recognition system is based on linear predictive coefficients, correlation against template and comparison of spectral energy in sub-bands.","PeriodicalId":193275,"journal":{"name":"2015 25th International Conference Radioelektronika (RADIOELEKTRONIKA)","volume":"68 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":"116198334","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.2015.7129019
M. Jonas
Recent progress in the field of satellite navigation systems (GNSS, SBAS) supports effort to use it for the determination of train position for the railway safety-related systems. Firstly, current state of art in this field is mentioned in this paper. The key feature of localization from the point of view of safety-related applications in transportation is integrity. Proposed method for increasing integrity is investigated in this paper. The method is based on relation between horizontal and vertical GNSS errors. This method has been investigated by simulations of errors in pseudoranges (multipath). Simulation was based on real pseudoranges measured by GNSS receiver. According to results of simulation error in horizontal plane can be detected by known error in vertical plane with assumption that we know position in vertical plane.
{"title":"Detection of GNSS errors caused by local effects","authors":"M. Jonas","doi":"10.1109/RADIOELEK.2015.7129019","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2015.7129019","url":null,"abstract":"Recent progress in the field of satellite navigation systems (GNSS, SBAS) supports effort to use it for the determination of train position for the railway safety-related systems. Firstly, current state of art in this field is mentioned in this paper. The key feature of localization from the point of view of safety-related applications in transportation is integrity. Proposed method for increasing integrity is investigated in this paper. The method is based on relation between horizontal and vertical GNSS errors. This method has been investigated by simulations of errors in pseudoranges (multipath). Simulation was based on real pseudoranges measured by GNSS receiver. According to results of simulation error in horizontal plane can be detected by known error in vertical plane with assumption that we know position in vertical plane.","PeriodicalId":193275,"journal":{"name":"2015 25th International Conference Radioelektronika (RADIOELEKTRONIKA)","volume":"30 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":"122177033","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.2015.7129020
K. Ozols
This paper describes an implementation of reception and real-time decoding of Asynchronous Sigma-Delta modulator (ASDM) encoded and wirelessly (On-off keying) transmitted signals. By using Fast reconstruction algorithm it is possible to reconstruct the original signal ≈ 25 times faster than by Classical reconstruction algorithm, if the signal lenght is 1 second, and ≈ 61, ≈ 130 and ≈ 228 times faster, if the length of the signal is 2, 4 and 8 seconds, respectively. Developed overall system consists of 3 parts - superheterodyne receiver, digitizer, PC with adaptive data reconstruction algorithm. Real-time decoding algorithm, which consist of data acquistion, filtering, processing, reconstruction and vizualization is implemented in LabView as a virtual instrument with graphical user interface (GUI).
{"title":"Implementation of reception and real-time decoding of ASDM encoded and wirelessly transmitted signals","authors":"K. Ozols","doi":"10.1109/RADIOELEK.2015.7129020","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2015.7129020","url":null,"abstract":"This paper describes an implementation of reception and real-time decoding of Asynchronous Sigma-Delta modulator (ASDM) encoded and wirelessly (On-off keying) transmitted signals. By using Fast reconstruction algorithm it is possible to reconstruct the original signal ≈ 25 times faster than by Classical reconstruction algorithm, if the signal lenght is 1 second, and ≈ 61, ≈ 130 and ≈ 228 times faster, if the length of the signal is 2, 4 and 8 seconds, respectively. Developed overall system consists of 3 parts - superheterodyne receiver, digitizer, PC with adaptive data reconstruction algorithm. Real-time decoding algorithm, which consist of data acquistion, filtering, processing, reconstruction and vizualization is implemented in LabView as a virtual instrument with graphical user interface (GUI).","PeriodicalId":193275,"journal":{"name":"2015 25th International Conference Radioelektronika (RADIOELEKTRONIKA)","volume":"98 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":"117217642","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.2015.7129021
Vilmos Rosner, Tamás Pető, R. Seller
This paper addresses the design and evaluation of monopulse antenna array used in UAV on-board collision avoidance radar. The antenna array use the advantages of the fractal geometry. The inverted Koch square patch fractal antenna has been modified in order to gain more control over the efficiency degradation originating from production difficulties and to meet the requirements of a monopulse collision avoidance radar. Simulation and measurement results show the applicability of fractal geometry in antenna arrays.
{"title":"Koch fractal antenna application in monopulse antenna array","authors":"Vilmos Rosner, Tamás Pető, R. Seller","doi":"10.1109/RADIOELEK.2015.7129021","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2015.7129021","url":null,"abstract":"This paper addresses the design and evaluation of monopulse antenna array used in UAV on-board collision avoidance radar. The antenna array use the advantages of the fractal geometry. The inverted Koch square patch fractal antenna has been modified in order to gain more control over the efficiency degradation originating from production difficulties and to meet the requirements of a monopulse collision avoidance radar. Simulation and measurement results show the applicability of fractal geometry in antenna arrays.","PeriodicalId":193275,"journal":{"name":"2015 25th International Conference Radioelektronika (RADIOELEKTRONIKA)","volume":"110 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":"125849509","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.2015.7129005
T. Lelek, O. Sadílek, R. Dolecek, L. Mlynařík, P. Sýkora
The paper deals with research activities about technical aspects of dual source railway vehicles on the Czech railway traffic system. The thought vehicle uses for powered traction equipment the catenary and traction battery system. The battery system design is based on the traction and vehicular simulations.
{"title":"Dual source railway vehicles","authors":"T. Lelek, O. Sadílek, R. Dolecek, L. Mlynařík, P. Sýkora","doi":"10.1109/RADIOELEK.2015.7129005","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2015.7129005","url":null,"abstract":"The paper deals with research activities about technical aspects of dual source railway vehicles on the Czech railway traffic system. The thought vehicle uses for powered traction equipment the catenary and traction battery system. The battery system design is based on the traction and vehicular simulations.","PeriodicalId":193275,"journal":{"name":"2015 25th International Conference Radioelektronika (RADIOELEKTRONIKA)","volume":"105 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":"124704326","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.2015.7129037
Matus Pleva, S. Ondáš, J. Juhár
Dialogue acts classification plays an important role in advanced dialogue management systems. They represent intention of the dialogue participant in the particular part of the dialogue interaction. Dialogue act classification lies in the classification of the spoken utterances according to their discourse function. It relies mainly on the classical machine learning techniques similar as in case of natural language processing (NLP) tasks. The HMM-based approach was applied to perform DA classification of utterances in Slovak language. Episodes of the Slovak TV talk show were used for creating of dialogue corpus with DA labels. New simplified annotation schema was designed and used for labeling the corpus with 12 DA classes. Bigram models of DA classes and dialogue grammar were trained on training part of the corpus. Decoding of testing utterances was done by comparing probabilities of occurrence and perplexity over trained bigrams. Obtained results are comparable with similar techniques and data sets.
{"title":"Automatic dialogue acts classification in Slovak dialogues","authors":"Matus Pleva, S. Ondáš, J. Juhár","doi":"10.1109/RADIOELEK.2015.7129037","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2015.7129037","url":null,"abstract":"Dialogue acts classification plays an important role in advanced dialogue management systems. They represent intention of the dialogue participant in the particular part of the dialogue interaction. Dialogue act classification lies in the classification of the spoken utterances according to their discourse function. It relies mainly on the classical machine learning techniques similar as in case of natural language processing (NLP) tasks. The HMM-based approach was applied to perform DA classification of utterances in Slovak language. Episodes of the Slovak TV talk show were used for creating of dialogue corpus with DA labels. New simplified annotation schema was designed and used for labeling the corpus with 12 DA classes. Bigram models of DA classes and dialogue grammar were trained on training part of the corpus. Decoding of testing utterances was done by comparing probabilities of occurrence and perplexity over trained bigrams. Obtained results are comparable with similar techniques and data sets.","PeriodicalId":193275,"journal":{"name":"2015 25th International Conference Radioelektronika (RADIOELEKTRONIKA)","volume":"8 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":"128650250","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.2015.7128985
J. Petrzela, R. Sotner
This summary paper introduces several circuitry implementations of the super-immittances, i.e. super-inductors and super-capacitors. The proposed circuits are ready neither for immediate design nor practical applications; further analysis is required here to answer stability questions or quantify other limitations. These networks are derived by using systematic procedure based on the matrix method of the unknown nodal voltages with prescribed form of input immittance. Doing this the realizations can be without inductors, electronically tunable via trans-admittance of the operational trans-admittance amplifiers. Proper functions of derived individual two-terminal elements are preliminary verified by Orcad Pspice circuit simulator. The non-ideal and parasitic properties of the used active elements are studied only briefly leaving the place for future research.
{"title":"Matrix-pencil approach to design super-immittances","authors":"J. Petrzela, R. Sotner","doi":"10.1109/RADIOELEK.2015.7128985","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2015.7128985","url":null,"abstract":"This summary paper introduces several circuitry implementations of the super-immittances, i.e. super-inductors and super-capacitors. The proposed circuits are ready neither for immediate design nor practical applications; further analysis is required here to answer stability questions or quantify other limitations. These networks are derived by using systematic procedure based on the matrix method of the unknown nodal voltages with prescribed form of input immittance. Doing this the realizations can be without inductors, electronically tunable via trans-admittance of the operational trans-admittance amplifiers. Proper functions of derived individual two-terminal elements are preliminary verified by Orcad Pspice circuit simulator. The non-ideal and parasitic properties of the used active elements are studied only briefly leaving the place for future research.","PeriodicalId":193275,"journal":{"name":"2015 25th International Conference Radioelektronika (RADIOELEKTRONIKA)","volume":"15 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":"129129776","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.2015.7128980
D. Matousek, O. Subrt
Trend of maximum reduction of the power consumption of electronic devices is still at forefront of interest. For portable electronic appliances Charge Pumps are usually used. Indeed Charge Pumps have particularly small size, easy integrability and higher working frequency than conventional DC/DC converters. The integration of Charge Pumps directly into the system allows manufacturers to feed a complex system with many specific power requirements from a single source. But Charge Pump efficiency is reduced by many phenomena. Relatively strong effect has threshold voltage of used transistors or diodes. This paper is concentrated on optimizing of properties of proposed variant of Charge Pump. So output voltage, drawn current and resulted efficiency of proposed Charge Pump were optimized based on simulations executed by Mentor Graphics.
{"title":"An innovative Charge Pump design and its properties optimization","authors":"D. Matousek, O. Subrt","doi":"10.1109/RADIOELEK.2015.7128980","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2015.7128980","url":null,"abstract":"Trend of maximum reduction of the power consumption of electronic devices is still at forefront of interest. For portable electronic appliances Charge Pumps are usually used. Indeed Charge Pumps have particularly small size, easy integrability and higher working frequency than conventional DC/DC converters. The integration of Charge Pumps directly into the system allows manufacturers to feed a complex system with many specific power requirements from a single source. But Charge Pump efficiency is reduced by many phenomena. Relatively strong effect has threshold voltage of used transistors or diodes. This paper is concentrated on optimizing of properties of proposed variant of Charge Pump. So output voltage, drawn current and resulted efficiency of proposed Charge Pump were optimized based on simulations executed by Mentor Graphics.","PeriodicalId":193275,"journal":{"name":"2015 25th International Conference Radioelektronika (RADIOELEKTRONIKA)","volume":"5 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":"125494640","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：