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.2019.8768825
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.2019.8768872
Furkan Durukan, Birhan Mert Güney, A. Özen
In this paper, color shift keying (CSK) modulation, which is selected as one of the modulation methods in visible light communication systems, is integrated with orthogonal frequency division multiplexing (OFDM) to increase the spectrum yield. However, the conventional fast Fourier transform (FFT) based OFDM needs that the CSK symbols be Hermitian symmetric, resulting in wasted bandwidth. In this study, it is proposed a real Fourier field based CSK OFDM technique using discrete Cosine transform (DCT), which can transform the real-value signal into a real-value signal and eliminate the need for Hermitian symmetry. Thus, the use of spectra has been doubled due to the removal of Hermitian symmetry in classical FFT-based OFDM systems. In order to test the achievement of the recommended CSK-modulated DCT-based OFDM (DCT-OFDM) and compare with the classical FFT-based OFDM and discrete sine transform (DST) based OFDM systems computer simulation studies are carried out in additive white Gaussian noise (AWGN) channel environment and a single path channel in indoor environment, where the transmitter and the receiver see each other (Line of sight, LOS). From the computer simulation outcomes, it is observed that approximately 17 dB of SNR gain is obtained with the proposed method for the 1E–3 BER value.
{"title":"A Novel CSK Modulated OFDM System for Visible Light Communication","authors":"Furkan Durukan, Birhan Mert Güney, A. Özen","doi":"10.1109/TSP.2019.8768872","DOIUrl":"https://doi.org/10.1109/TSP.2019.8768872","url":null,"abstract":"In this paper, color shift keying (CSK) modulation, which is selected as one of the modulation methods in visible light communication systems, is integrated with orthogonal frequency division multiplexing (OFDM) to increase the spectrum yield. However, the conventional fast Fourier transform (FFT) based OFDM needs that the CSK symbols be Hermitian symmetric, resulting in wasted bandwidth. In this study, it is proposed a real Fourier field based CSK OFDM technique using discrete Cosine transform (DCT), which can transform the real-value signal into a real-value signal and eliminate the need for Hermitian symmetry. Thus, the use of spectra has been doubled due to the removal of Hermitian symmetry in classical FFT-based OFDM systems. In order to test the achievement of the recommended CSK-modulated DCT-based OFDM (DCT-OFDM) and compare with the classical FFT-based OFDM and discrete sine transform (DST) based OFDM systems computer simulation studies are carried out in additive white Gaussian noise (AWGN) channel environment and a single path channel in indoor environment, where the transmitter and the receiver see each other (Line of sight, LOS). From the computer simulation outcomes, it is observed that approximately 17 dB of SNR gain is obtained with the proposed method for the 1E–3 BER value.","PeriodicalId":399087,"journal":{"name":"2019 42nd International Conference on Telecommunications and Signal Processing (TSP)","volume":"83 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":"121479053","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.2019.8768892
Alina Elena Marcu, R. Dobre, O. Datcu, G. Suciu, Je-Hui Oh
In the recent years, the conventional lighting systems are beginning to be replaced by LED lighting systems. In a Visible Light Communication (VLC) system, the visible light is used to provide a link between a transmitter, who is typically a LED, and a receiver, which is either a photodetector or an image sensor. The VLC can be used, besides illumination, for transferring data by changing very fast the light intensity of the LED and not to be perceived by the human eye as flicker. In recent applications, high frame rate cameras have begun to be used, but their disadvantage is the high cost. This paper proposes and experimentally validates a VLC solution that uses low frame rate camera and does not require a transmitter-receiver synchronization.
{"title":"Flicker Free VLC System with Automatic Code Resynchronization using Low Frame Rate Camera","authors":"Alina Elena Marcu, R. Dobre, O. Datcu, G. Suciu, Je-Hui Oh","doi":"10.1109/TSP.2019.8768892","DOIUrl":"https://doi.org/10.1109/TSP.2019.8768892","url":null,"abstract":"In the recent years, the conventional lighting systems are beginning to be replaced by LED lighting systems. In a Visible Light Communication (VLC) system, the visible light is used to provide a link between a transmitter, who is typically a LED, and a receiver, which is either a photodetector or an image sensor. The VLC can be used, besides illumination, for transferring data by changing very fast the light intensity of the LED and not to be perceived by the human eye as flicker. In recent applications, high frame rate cameras have begun to be used, but their disadvantage is the high cost. This paper proposes and experimentally validates a VLC solution that uses low frame rate camera and does not require a transmitter-receiver synchronization.","PeriodicalId":399087,"journal":{"name":"2019 42nd International Conference on Telecommunications and Signal Processing (TSP)","volume":"45 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":"128178115","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.2019.8769062
Dumisani Ngwenya, B. T. Maharaj, A. Alfa
Analytic modelling of TCP congestion control has been a subject of intense research in the past two decades for both wireline and wireless high-speed Broadband networks. There has not been a single simple analytical approach that covers a wide range of TCP congestion control variants, making it hard to compare them against each other.. The contribution of this paper is generalization of a Markov model, previously used for TCP Cubic, so that it can also be used for TCP NewReno and a wide range of random loss rates. We also argue that the model can be easily extended to other mechanisms, even model-based mechanisms and those that are hard to define mathematically. We show that the results of the model tally with literature results. The model captures correctly the behaviour of TCP NewReno and TCP Cubic in environments with high random loss rates. We further confirm the results with NS3 simulation.
{"title":"Markov Based Computational Model for Performance Evaluation of Congestion Control Variants","authors":"Dumisani Ngwenya, B. T. Maharaj, A. Alfa","doi":"10.1109/TSP.2019.8769062","DOIUrl":"https://doi.org/10.1109/TSP.2019.8769062","url":null,"abstract":"Analytic modelling of TCP congestion control has been a subject of intense research in the past two decades for both wireline and wireless high-speed Broadband networks. There has not been a single simple analytical approach that covers a wide range of TCP congestion control variants, making it hard to compare them against each other.. The contribution of this paper is generalization of a Markov model, previously used for TCP Cubic, so that it can also be used for TCP NewReno and a wide range of random loss rates. We also argue that the model can be easily extended to other mechanisms, even model-based mechanisms and those that are hard to define mathematically. We show that the results of the model tally with literature results. The model captures correctly the behaviour of TCP NewReno and TCP Cubic in environments with high random loss rates. We further confirm the results with NS3 simulation.","PeriodicalId":399087,"journal":{"name":"2019 42nd International Conference on Telecommunications and Signal Processing (TSP)","volume":"1 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":"131046977","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.2019.8768812
R. Mîrsu, G. Simion, C. Căleanu, Oana Ursulescu, Ioana-Monica Pop-Calimanu
Deep Neural Networks and their associated learning paradigm, Deep Learning, represent one of the hottest approaches used in image understanding and recognition. As their performances depends quasi-linearly on the amount of available data, the typical case studies in the literature assume the availability of huge datasets. This paper proposes to analyze several deep neural networks (trained from the scratch or pre-trained), test their efficiency in the problem of hand gesture recognition, and compare the results to a state-of-the-art classical method, the bag of features, for the case of small databases.
{"title":"Deep Neural Networks vs Bag of Features for Hand Gesture Recognition","authors":"R. Mîrsu, G. Simion, C. Căleanu, Oana Ursulescu, Ioana-Monica Pop-Calimanu","doi":"10.1109/TSP.2019.8768812","DOIUrl":"https://doi.org/10.1109/TSP.2019.8768812","url":null,"abstract":"Deep Neural Networks and their associated learning paradigm, Deep Learning, represent one of the hottest approaches used in image understanding and recognition. As their performances depends quasi-linearly on the amount of available data, the typical case studies in the literature assume the availability of huge datasets. This paper proposes to analyze several deep neural networks (trained from the scratch or pre-trained), test their efficiency in the problem of hand gesture recognition, and compare the results to a state-of-the-art classical method, the bag of features, for the case of small databases.","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":"128110704","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.2019.8768855
{"title":"TSP 2019 Reviewers","authors":"","doi":"10.1109/tsp.2019.8768855","DOIUrl":"https://doi.org/10.1109/tsp.2019.8768855","url":null,"abstract":"","PeriodicalId":399087,"journal":{"name":"2019 42nd International Conference on Telecommunications and Signal Processing (TSP)","volume":"75 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":"128305340","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.2019.8769055
Petr Dejdar, P. Munster, T. Horváth
The paper describes the possibilities of data acquisition and data processing from optical sensing systems. There are some data acquisition cards and their disadvantages when used for more complex single fiber sensor systems in the paper. It is suitable to use some open source hardware because commercially available data acquisition cards are more complex and universal which means they have several different inputs/outputs and large dimensions. STEMLab 125-14 (Red Pitaya) appears to be the most suitable solution because offers 2 analog inputs and 2 analog outputs. Compare to standard data processing systems, this is supposed to be an advantage in preprocessing data using programmable logic. This can reduce the volume of transmitted data and can also speed up processing. Thus, the measurement system will be smaller and cheaper. The device contains DA converters, therefore pulses might be generated using the same clock which enables synchronization of backscatter signal.
{"title":"High-speed Data Acquisition and Signal Processing Using Cost Effective ARM + FPGA Processors","authors":"Petr Dejdar, P. Munster, T. Horváth","doi":"10.1109/TSP.2019.8769055","DOIUrl":"https://doi.org/10.1109/TSP.2019.8769055","url":null,"abstract":"The paper describes the possibilities of data acquisition and data processing from optical sensing systems. There are some data acquisition cards and their disadvantages when used for more complex single fiber sensor systems in the paper. It is suitable to use some open source hardware because commercially available data acquisition cards are more complex and universal which means they have several different inputs/outputs and large dimensions. STEMLab 125-14 (Red Pitaya) appears to be the most suitable solution because offers 2 analog inputs and 2 analog outputs. Compare to standard data processing systems, this is supposed to be an advantage in preprocessing data using programmable logic. This can reduce the volume of transmitted data and can also speed up processing. Thus, the measurement system will be smaller and cheaper. The device contains DA converters, therefore pulses might be generated using the same clock which enables synchronization of backscatter signal.","PeriodicalId":399087,"journal":{"name":"2019 42nd International Conference on Telecommunications and Signal Processing (TSP)","volume":"34 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":"127095951","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.2019.8768846
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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