Pub Date : 2019-07-01DOI: 10.1109/TSP.2019.8769106
J. Petrzela, Ondrej Domansky
This paper demonstrates through computer-aided simulations that simple loop composed of single nonlinear active two-port and a fractional-order filter can generate robust chaotic attractor. Involved passive ladder trans-impedance mode filter contains two-terminal constant phase element that is accurately approximated in the frequency domain in wide frequency range; beginning at 10 Hz and ending with 1 MHz. It is shown that the mathematical order of a designed lumped chaotic system can be decreased significantly below 3 without qualitative changes in the global dynamics. Fundamental properties of the filtering network responsible for chaos evolution are specified and discussed.
{"title":"Simple Chaotic Oscillator with Wideband Passive Fractional-Order Inductor","authors":"J. Petrzela, Ondrej Domansky","doi":"10.1109/TSP.2019.8769106","DOIUrl":"https://doi.org/10.1109/TSP.2019.8769106","url":null,"abstract":"This paper demonstrates through computer-aided simulations that simple loop composed of single nonlinear active two-port and a fractional-order filter can generate robust chaotic attractor. Involved passive ladder trans-impedance mode filter contains two-terminal constant phase element that is accurately approximated in the frequency domain in wide frequency range; beginning at 10 Hz and ending with 1 MHz. It is shown that the mathematical order of a designed lumped chaotic system can be decreased significantly below 3 without qualitative changes in the global dynamics. Fundamental properties of the filtering network responsible for chaos evolution are specified and discussed.","PeriodicalId":399087,"journal":{"name":"2019 42nd International Conference on Telecommunications and Signal Processing (TSP)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115095030","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 : 2019-07-01DOI: 10.1109/TSP.2019.8768811
V. Oujezský, David Chapcak, T. Horváth, P. Munster
This article presents results and overview of conducted testing of active optical network devices. The base for the testing is originating in Kali Linux and penetration testing generally. The goal of tests is to either confirm or disprove a vulnerability of devices used in the tested polygon. The first part deals with general overview and topology of testing devices, the next part is dedicated to active and passive exploration and exploits. The last part provides a summary of the results.
{"title":"Security Testing Of Active Optical Network Devices","authors":"V. Oujezský, David Chapcak, T. Horváth, P. Munster","doi":"10.1109/TSP.2019.8768811","DOIUrl":"https://doi.org/10.1109/TSP.2019.8768811","url":null,"abstract":"This article presents results and overview of conducted testing of active optical network devices. The base for the testing is originating in Kali Linux and penetration testing generally. The goal of tests is to either confirm or disprove a vulnerability of devices used in the tested polygon. The first part deals with general overview and topology of testing devices, the next part is dedicated to active and passive exploration and exploits. The last part provides a summary of the results.","PeriodicalId":399087,"journal":{"name":"2019 42nd International Conference on Telecommunications and Signal Processing (TSP)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114822035","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 : 2019-07-01DOI: 10.1109/TSP.2019.8769112
Y. Nechaev, I. Peshkov
In this paper an approach of obtaining optimal planar antenna arrays consisting of omnidirectional sensors is proposed. The novelty of the proposed approach is to apply an exact expression of the Cramer-Rao lower bound for an arbitrary planar antenna array consisting of a number of omnidirectional elements which has been presented in the further chapters of the paper. The obtained formula describes the influence of antenna elements locations on the direction-of-arrival estimation accuracy. It has been shown that the direction-of-arrival accuracy via planar antenna arrays is determined as the sum of squares of differences between all omnidirectional elements coordinates along x- and y-axis. Thus knowing an expected area or sector of signal source it is very easy to calculate optimal arrangement of antenna elements in order to reduce direction-finding errors, because obtained by that way positions gives the best match according to the maximum likelihood criterion. It is found out that the new shapes of antenna arrays based on the analytical expressions have better direction-of-arrival accuracy in comparison with the circular ones.
{"title":"Novel Planar Antenna Arrays Geometries Improving DOA Estimation Accuracy of Narrowband Sources on the Azimuth","authors":"Y. Nechaev, I. Peshkov","doi":"10.1109/TSP.2019.8769112","DOIUrl":"https://doi.org/10.1109/TSP.2019.8769112","url":null,"abstract":"In this paper an approach of obtaining optimal planar antenna arrays consisting of omnidirectional sensors is proposed. The novelty of the proposed approach is to apply an exact expression of the Cramer-Rao lower bound for an arbitrary planar antenna array consisting of a number of omnidirectional elements which has been presented in the further chapters of the paper. The obtained formula describes the influence of antenna elements locations on the direction-of-arrival estimation accuracy. It has been shown that the direction-of-arrival accuracy via planar antenna arrays is determined as the sum of squares of differences between all omnidirectional elements coordinates along x- and y-axis. Thus knowing an expected area or sector of signal source it is very easy to calculate optimal arrangement of antenna elements in order to reduce direction-finding errors, because obtained by that way positions gives the best match according to the maximum likelihood criterion. It is found out that the new shapes of antenna arrays based on the analytical expressions have better direction-of-arrival accuracy in comparison with the circular ones.","PeriodicalId":399087,"journal":{"name":"2019 42nd International Conference on Telecommunications and Signal Processing (TSP)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125008197","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 : 2019-07-01DOI: 10.1109/TSP.2019.8768842
Alexandru-George Rusu, S. Ciochină, C. Paleologu
The least-mean-square (LMS) and the normalized least-mean-square (NLMS) algorithms require a trade-off between fast convergence and low misadjustment, obtained by choosing the control parameters. In general, time variable parameters are proposed according to different rules. Many studies on the optimization of the NLMS algorithm imply time variable control parameters according some specific criteria. In this paper, we develop an optimized LMS algorithm, in the context of a state variable model. The proposed algorithm follows an optimization problem and introduces a variable step-size in order to minimize the system misalignment. The simulations confirm the theoretical results and show the good features of the algorithm.
{"title":"On the Step-Size optimization of the LMS Algorithm","authors":"Alexandru-George Rusu, S. Ciochină, C. Paleologu","doi":"10.1109/TSP.2019.8768842","DOIUrl":"https://doi.org/10.1109/TSP.2019.8768842","url":null,"abstract":"The least-mean-square (LMS) and the normalized least-mean-square (NLMS) algorithms require a trade-off between fast convergence and low misadjustment, obtained by choosing the control parameters. In general, time variable parameters are proposed according to different rules. Many studies on the optimization of the NLMS algorithm imply time variable control parameters according some specific criteria. In this paper, we develop an optimized LMS algorithm, in the context of a state variable model. The proposed algorithm follows an optimization problem and introduces a variable step-size in order to minimize the system misalignment. The simulations confirm the theoretical results and show the good features of the algorithm.","PeriodicalId":399087,"journal":{"name":"2019 42nd International Conference on Telecommunications and Signal Processing (TSP)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121714685","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 : 2019-07-01DOI: 10.1109/TSP.2019.8768838
T. Bakhvalova, D. Fofanov, A. Alyoshin, M. Belkin
This We compare in detail the both available methods of intensity modulation in C-band: a direct one controlling injection current of distributed feedback laser or vertical cavity surface emitting laser, also an external one using electroabsorption modulator or lithium-niobate Mach-Zehnder modulator. In all cases, the same 64-position quadrature modulated signal at the radio-frequency carrier propagates over fiber fronthaul link of an analog Radio-over-Fiber system. Two limiting factors were taken into account: parasitic frequency chirp and fiber dispersion. In the result, the fiber distance of the link under study reaches within standard limit of 8% up to 33 km for a vertical cavity surface emitting laser, up to 55 km for a distributed feedback laser, up to 58 km for an electroabsorption modulator, and up to 62 km for a Mach-Zehnder modulator that are comparable with known data for individual devices under test. During the study of link at the carrier frequencies up to 10 GHz an intriguing effect was found for the case of a vertical cavity surface emitting laser, which consists in a drop in the slope of the error values with their increasing that is most likely explained by the presence of inverse frequency dependence of the adiabatic chirp factor’s magnitude and phase.
{"title":"Fiber Distribution Networks with Direct and External Modulation of Digital QAM-Signals","authors":"T. Bakhvalova, D. Fofanov, A. Alyoshin, M. Belkin","doi":"10.1109/TSP.2019.8768838","DOIUrl":"https://doi.org/10.1109/TSP.2019.8768838","url":null,"abstract":"This We compare in detail the both available methods of intensity modulation in C-band: a direct one controlling injection current of distributed feedback laser or vertical cavity surface emitting laser, also an external one using electroabsorption modulator or lithium-niobate Mach-Zehnder modulator. In all cases, the same 64-position quadrature modulated signal at the radio-frequency carrier propagates over fiber fronthaul link of an analog Radio-over-Fiber system. Two limiting factors were taken into account: parasitic frequency chirp and fiber dispersion. In the result, the fiber distance of the link under study reaches within standard limit of 8% up to 33 km for a vertical cavity surface emitting laser, up to 55 km for a distributed feedback laser, up to 58 km for an electroabsorption modulator, and up to 62 km for a Mach-Zehnder modulator that are comparable with known data for individual devices under test. During the study of link at the carrier frequencies up to 10 GHz an intriguing effect was found for the case of a vertical cavity surface emitting laser, which consists in a drop in the slope of the error values with their increasing that is most likely explained by the presence of inverse frequency dependence of the adiabatic chirp factor’s magnitude and phase.","PeriodicalId":399087,"journal":{"name":"2019 42nd International Conference on Telecommunications and Signal Processing (TSP)","volume":"417 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124182775","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 : 2019-07-01DOI: 10.1109/TSP.2019.8768898
Vassilis Alimisis, P. Bertsias, C. Psychalinos, A. Elwakil
A fractional-order implementation of the model of the arterial viscoelasticity is presented in this work. The main attractive offered benefit is that all the states of the arterial viscoelasticity are implemented by the same core, just by adjusting appropriate dc bias currents. This has been achieved through the proposal of an enhanced fractional-order inductor emulator, where the characteristics of the element can be independently adjusted. The behavior of the designed model has been evaluated through post-layout simulation results, using the Cadence IC design suite and the Design Kit provided by the Austria Mikro Systeme (AMS) 0.35μm CMOS process.
{"title":"Electronically Tunable Implementation of the Arterial Viscoelasticity Model","authors":"Vassilis Alimisis, P. Bertsias, C. Psychalinos, A. Elwakil","doi":"10.1109/TSP.2019.8768898","DOIUrl":"https://doi.org/10.1109/TSP.2019.8768898","url":null,"abstract":"A fractional-order implementation of the model of the arterial viscoelasticity is presented in this work. The main attractive offered benefit is that all the states of the arterial viscoelasticity are implemented by the same core, just by adjusting appropriate dc bias currents. This has been achieved through the proposal of an enhanced fractional-order inductor emulator, where the characteristics of the element can be independently adjusted. The behavior of the designed model has been evaluated through post-layout simulation results, using the Cadence IC design suite and the Design Kit provided by the Austria Mikro Systeme (AMS) 0.35μm CMOS process.","PeriodicalId":399087,"journal":{"name":"2019 42nd International Conference on Telecommunications and Signal Processing (TSP)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125727597","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 : 2019-07-01DOI: 10.1109/TSP.2019.8769081
K. Angkeaw, Witthawas Pongyart, P. Prommee
Analog circuits were once necessary in many fields of technology, including control systems. Analog circuits were used to build many types of controller, but in controller design, synthesis of analog circuits were difficult. Because of its difficulty, most analog controllers have been replaced by digital controllers. Currently, the field programmable analog arrays (FPAA) which is a high level analog circuit, switched capacitor are widely used. Effective controller design and synthesis of analog circuits can be achieved easily using the FPAA. Therefore, the FPAA is applied to this project to design and synthesize an enhanced controller. An optimal controller, LQR as an example requires precise controller gain to obtain the highest performance which cannot be obtained using normal analog circuits. Moreover, using the FPAA can overcome performance degradation due to discretization in the synthesis of digital controllers. The simulation results confirm the advantages of a FPAA controller.
{"title":"Design and Implementation of FPAA based LQR Controller for Magnetic Levitation Control System","authors":"K. Angkeaw, Witthawas Pongyart, P. Prommee","doi":"10.1109/TSP.2019.8769081","DOIUrl":"https://doi.org/10.1109/TSP.2019.8769081","url":null,"abstract":"Analog circuits were once necessary in many fields of technology, including control systems. Analog circuits were used to build many types of controller, but in controller design, synthesis of analog circuits were difficult. Because of its difficulty, most analog controllers have been replaced by digital controllers. Currently, the field programmable analog arrays (FPAA) which is a high level analog circuit, switched capacitor are widely used. Effective controller design and synthesis of analog circuits can be achieved easily using the FPAA. Therefore, the FPAA is applied to this project to design and synthesize an enhanced controller. An optimal controller, LQR as an example requires precise controller gain to obtain the highest performance which cannot be obtained using normal analog circuits. Moreover, using the FPAA can overcome performance degradation due to discretization in the synthesis of digital controllers. The simulation results confirm the advantages of a FPAA controller.","PeriodicalId":399087,"journal":{"name":"2019 42nd International Conference on Telecommunications and Signal Processing (TSP)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115919931","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 : 2019-07-01DOI: 10.1109/TSP.2019.8768875
P. Bertsias, C. Psychalinos, A. Elwakil, A. Radwan
Novel fractional-order capacitor and inductor em-ulators are presented in this work, which offer fully electronic tunability of their characteristics and, simultaneously, reduced circuit complexity compared to those already introduced in the literature. This has been achieved through the utilization of the log-domain filtering for implementing the approximation of the required fractional-order differentiation/integration stages. The behavior of the presented topology is evaluated using the Cadence software and MOS transistor models provided by the 0.35μm Austria Mikro Systeme CMOS process.
{"title":"Log-Domain Implementation of Fractional-Order Element Emulators","authors":"P. Bertsias, C. Psychalinos, A. Elwakil, A. Radwan","doi":"10.1109/TSP.2019.8768875","DOIUrl":"https://doi.org/10.1109/TSP.2019.8768875","url":null,"abstract":"Novel fractional-order capacitor and inductor em-ulators are presented in this work, which offer fully electronic tunability of their characteristics and, simultaneously, reduced circuit complexity compared to those already introduced in the literature. This has been achieved through the utilization of the log-domain filtering for implementing the approximation of the required fractional-order differentiation/integration stages. The behavior of the presented topology is evaluated using the Cadence software and MOS transistor models provided by the 0.35μm Austria Mikro Systeme CMOS process.","PeriodicalId":399087,"journal":{"name":"2019 42nd International Conference on Telecommunications and Signal Processing (TSP)","volume":"311 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122427628","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 : 2019-07-01DOI: 10.1109/TSP.2019.8768825
A. Parres-Peredo, I. Piza-Dávila, Francisco Cervantes
Serverless computing is a novel usage of cloud computing that offers programmers an environment to execute functions with no concerns on the infrastructure where the code runs. This work presents a serverless implementation of a technique used in cybersecurity, which focuses on the identification of unexpected behaviors from network users by means of TopK rankings. The implementation proposed leverages the potential of serverless computing by integrating the following services from Amazon Web Services: Lambda, DynamoDB, SQS and S3. The running time required to process user network traffic was dramatically reduced in comparison to other implementations of the same algorithm.
无服务器计算是云计算的一种新用法，它为程序员提供了一个执行函数的环境，而不需要考虑代码运行的基础设施。这项工作提出了一种用于网络安全的技术的无服务器实现，其重点是通过TopK排名来识别网络用户的意外行为。提议的实现通过集成Amazon Web services中的以下服务来利用无服务器计算的潜力:Lambda、DynamoDB、SQS和S3。与同一算法的其他实现相比，处理用户网络流量所需的运行时间大大减少。
{"title":"Building and Evaluating User Network Profiles for Cybersecurity Using Serverless Architecture","authors":"A. Parres-Peredo, I. Piza-Dávila, Francisco Cervantes","doi":"10.1109/TSP.2019.8768825","DOIUrl":"https://doi.org/10.1109/TSP.2019.8768825","url":null,"abstract":"Serverless computing is a novel usage of cloud computing that offers programmers an environment to execute functions with no concerns on the infrastructure where the code runs. This work presents a serverless implementation of a technique used in cybersecurity, which focuses on the identification of unexpected behaviors from network users by means of TopK rankings. The implementation proposed leverages the potential of serverless computing by integrating the following services from Amazon Web Services: Lambda, DynamoDB, SQS and S3. The running time required to process user network traffic was dramatically reduced in comparison to other implementations of the same algorithm.","PeriodicalId":399087,"journal":{"name":"2019 42nd International Conference on Telecommunications and Signal Processing (TSP)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121231723","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 : 2019-07-01DOI: 10.1109/TSP.2019.8768846
H. Filipescu, P. Papazian
Relying on the phenomena which occurs when electric current is passing through a human skin segment an equivalent electric circuit can be defined. The parameters of this circuit were studied and as a proof of concept of the proposed method and device the equivalent circuit was modeled in VHDLAMS. Furthermore, an FPGA implementation of an earlier device also conceived by the authors is hereby presented as a novel approach of the matter.
{"title":"VHDL-AMS Modelling And FPGA Implementation Of Electrodermal Centers Analyzer","authors":"H. Filipescu, P. Papazian","doi":"10.1109/TSP.2019.8768846","DOIUrl":"https://doi.org/10.1109/TSP.2019.8768846","url":null,"abstract":"Relying on the phenomena which occurs when electric current is passing through a human skin segment an equivalent electric circuit can be defined. The parameters of this circuit were studied and as a proof of concept of the proposed method and device the equivalent circuit was modeled in VHDLAMS. Furthermore, an FPGA implementation of an earlier device also conceived by the authors is hereby presented as a novel approach of the matter.","PeriodicalId":399087,"journal":{"name":"2019 42nd International Conference on Telecommunications and Signal Processing (TSP)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122240151","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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