Pub Date : 2017-10-01DOI: 10.1109/TELSKS.2017.8246267
F. Á. Franco, Joaquín Esteban, J. M. Villadangos
This work proposes the use of an indoor acoustic positioning system for the accurate positioning of unmanned aerial vehicles. This system is based on a Time-Code Division Multiple Access scheme, where the sequential emission of five BPSK modulated Kasami codes is performed to estimate the vehicle position through a multilateration procedure. The effect of the vehicle rotors on the detection of these broadband signals is experimentally analyzed for different relative powers. Preliminary results confirm the feasibility of the proposed system to provide accurate position estimates even under very low signal-to-noise ratios.
{"title":"High accuracy APS for unmanned aerial vehicles","authors":"F. Á. Franco, Joaquín Esteban, J. M. Villadangos","doi":"10.1109/TELSKS.2017.8246267","DOIUrl":"https://doi.org/10.1109/TELSKS.2017.8246267","url":null,"abstract":"This work proposes the use of an indoor acoustic positioning system for the accurate positioning of unmanned aerial vehicles. This system is based on a Time-Code Division Multiple Access scheme, where the sequential emission of five BPSK modulated Kasami codes is performed to estimate the vehicle position through a multilateration procedure. The effect of the vehicle rotors on the detection of these broadband signals is experimentally analyzed for different relative powers. Preliminary results confirm the feasibility of the proposed system to provide accurate position estimates even under very low signal-to-noise ratios.","PeriodicalId":206778,"journal":{"name":"2017 13th International Conference on Advanced Technologies, Systems and Services in Telecommunications (TELSIKS)","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115966949","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 : 2017-10-01DOI: 10.1109/TELSKS.2017.8246260
B. Stošić, V. Pavlovic
The objective of this paper is to generate new low-pass FIR filters with linear phase response. The Chebyshev orthogonal polynomials of the second kind are used to generate the design forms of the new non-recursive filters. Comparative analyses of frequency response characteristics of these filters with filters suggested earlier in the literature are given for the same design parameters in a few examples.
{"title":"Chebyshev polynomials of the second kind in filter design","authors":"B. Stošić, V. Pavlovic","doi":"10.1109/TELSKS.2017.8246260","DOIUrl":"https://doi.org/10.1109/TELSKS.2017.8246260","url":null,"abstract":"The objective of this paper is to generate new low-pass FIR filters with linear phase response. The Chebyshev orthogonal polynomials of the second kind are used to generate the design forms of the new non-recursive filters. Comparative analyses of frequency response characteristics of these filters with filters suggested earlier in the literature are given for the same design parameters in a few examples.","PeriodicalId":206778,"journal":{"name":"2017 13th International Conference on Advanced Technologies, Systems and Services in Telecommunications (TELSIKS)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133406753","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 : 2017-10-01DOI: 10.1109/TELSKS.2017.8246269
S. Bandopadhaya, S. Samal, Saroj Kumar Dora, V. Poulkov
This paper proposes a novel solution to maximize energy efficiency (EE) in interference-limited (IL) cellular networks encountered in Long-Term Evolution (LTE) and LTE-Advanced systems. The high-data rate applications running through mobile devices together with the radio access devices at the base stations (BS) cause a significant growth in energy consumption in the network accounting a large share of network operation expenditure (OpEx), as well as increased carbon emissions. Unlike an interference-free network, in the IL cellular network, a monotonically increase of the transmission power does not necessarily improve the spectral efficiency (SE) of the network. For the analysis of the EE an information theoretic approach is applied and represented as a function of the BS transmission power considering the interference signals. A gradient based optimal level solution for the BS transmission power is derived to maximize EE. A network operator can significantly reduce the energy cost by setting the transmission power of the BS at the optimum level.
{"title":"Base station transmission power optimization in interference-limited cellular networks for maximum energy efficiency","authors":"S. Bandopadhaya, S. Samal, Saroj Kumar Dora, V. Poulkov","doi":"10.1109/TELSKS.2017.8246269","DOIUrl":"https://doi.org/10.1109/TELSKS.2017.8246269","url":null,"abstract":"This paper proposes a novel solution to maximize energy efficiency (EE) in interference-limited (IL) cellular networks encountered in Long-Term Evolution (LTE) and LTE-Advanced systems. The high-data rate applications running through mobile devices together with the radio access devices at the base stations (BS) cause a significant growth in energy consumption in the network accounting a large share of network operation expenditure (OpEx), as well as increased carbon emissions. Unlike an interference-free network, in the IL cellular network, a monotonically increase of the transmission power does not necessarily improve the spectral efficiency (SE) of the network. For the analysis of the EE an information theoretic approach is applied and represented as a function of the BS transmission power considering the interference signals. A gradient based optimal level solution for the BS transmission power is derived to maximize EE. A network operator can significantly reduce the energy cost by setting the transmission power of the BS at the optimum level.","PeriodicalId":206778,"journal":{"name":"2017 13th International Conference on Advanced Technologies, Systems and Services in Telecommunications (TELSIKS)","volume":"111 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124108620","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 : 2017-10-01DOI: 10.1109/TELSKS.2017.8246251
K. Hamze, D. Pasquet, P. Descamps, E. De Ledinghen
The purpose of this article is to describe the effect of the parasitic even mode on the propagation of a signal along a bended coplanar waveguide and to evaluate the errors when bended standards are used in a TRL calibration instead of straight ones.
{"title":"Theoretical comparison between calibration standards using straight and bended CPW's","authors":"K. Hamze, D. Pasquet, P. Descamps, E. De Ledinghen","doi":"10.1109/TELSKS.2017.8246251","DOIUrl":"https://doi.org/10.1109/TELSKS.2017.8246251","url":null,"abstract":"The purpose of this article is to describe the effect of the parasitic even mode on the propagation of a signal along a bended coplanar waveguide and to evaluate the errors when bended standards are used in a TRL calibration instead of straight ones.","PeriodicalId":206778,"journal":{"name":"2017 13th International Conference on Advanced Technologies, Systems and Services in Telecommunications (TELSIKS)","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114818493","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 : 2017-10-01DOI: 10.1109/TELSKS.2017.8246215
Z. Popovic
This paper presents and overview of near and far-field wireless power transfer at RF and microwave frequencies for a variety of applications, ranging from near-field capacitive kW-level powering for cars in motion at MHz frequencies, to harvesting very low statistically-varying power densities across the microwave range and a study of directive beaming for space applications. In all applications, the primary consideration is both transmit and receive power efficiency, but at higher power levels, other factors such as safety regulations, become relevant and require new approaches. Specific examples are given for a near-field phased array at 6.78 MHz for vehicle powering, an airborn 4.3GHz harvester and a study for a microwave large array lunar directive beaming scenario.
{"title":"Near- and far-field wireless power transfer","authors":"Z. Popovic","doi":"10.1109/TELSKS.2017.8246215","DOIUrl":"https://doi.org/10.1109/TELSKS.2017.8246215","url":null,"abstract":"This paper presents and overview of near and far-field wireless power transfer at RF and microwave frequencies for a variety of applications, ranging from near-field capacitive kW-level powering for cars in motion at MHz frequencies, to harvesting very low statistically-varying power densities across the microwave range and a study of directive beaming for space applications. In all applications, the primary consideration is both transmit and receive power efficiency, but at higher power levels, other factors such as safety regulations, become relevant and require new approaches. Specific examples are given for a near-field phased array at 6.78 MHz for vehicle powering, an airborn 4.3GHz harvester and a study for a microwave large array lunar directive beaming scenario.","PeriodicalId":206778,"journal":{"name":"2017 13th International Conference on Advanced Technologies, Systems and Services in Telecommunications (TELSIKS)","volume":"152 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127313353","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 : 2017-10-01DOI: 10.1109/TELSKS.2017.8246225
D. Drajic
During his long creative life, Tesla applied for and obtained several hundreds of patent rights in a number of countries. In the beginning, the notion “radio engineering” was not used and Tesla's patents were mainly connected to electrical energy generation, transmission and utilization. Their principles, however, were often applicable to radio transmission as well. This paper gives a short overview of the basic patents applicable to radio engineering. In addition, the paper provides a comment on the radio patent dispute with Marconi which was posthumously won by Tesla.
{"title":"Tesla's contribution to radio engineering","authors":"D. Drajic","doi":"10.1109/TELSKS.2017.8246225","DOIUrl":"https://doi.org/10.1109/TELSKS.2017.8246225","url":null,"abstract":"During his long creative life, Tesla applied for and obtained several hundreds of patent rights in a number of countries. In the beginning, the notion “radio engineering” was not used and Tesla's patents were mainly connected to electrical energy generation, transmission and utilization. Their principles, however, were often applicable to radio transmission as well. This paper gives a short overview of the basic patents applicable to radio engineering. In addition, the paper provides a comment on the radio patent dispute with Marconi which was posthumously won by Tesla.","PeriodicalId":206778,"journal":{"name":"2017 13th International Conference on Advanced Technologies, Systems and Services in Telecommunications (TELSIKS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129210750","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 : 2017-10-01DOI: 10.1109/TELSKS.2017.8246295
G. Crupi, Z. Marinković, D. Schreurs, V. Markovic, A. Caddemi
We report on the characterization and modelling of a microwave MOSFET. We have characterized the tested on-wafer transistor by measuring DC characteristics and multi-bias scattering parameters up to 40 GHz. Furthermore, we have analytically extracted a small-signal equivalent circuit model that has been extensively and successfully validated against experimental data.
{"title":"Multi-bias equivalent circuit for MOSFET modelling","authors":"G. Crupi, Z. Marinković, D. Schreurs, V. Markovic, A. Caddemi","doi":"10.1109/TELSKS.2017.8246295","DOIUrl":"https://doi.org/10.1109/TELSKS.2017.8246295","url":null,"abstract":"We report on the characterization and modelling of a microwave MOSFET. We have characterized the tested on-wafer transistor by measuring DC characteristics and multi-bias scattering parameters up to 40 GHz. Furthermore, we have analytically extracted a small-signal equivalent circuit model that has been extensively and successfully validated against experimental data.","PeriodicalId":206778,"journal":{"name":"2017 13th International Conference on Advanced Technologies, Systems and Services in Telecommunications (TELSIKS)","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121222105","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 : 2017-10-01DOI: 10.1109/TELSKS.2017.8246264
T. Barbu
We consider a novel structure-based image inpainting technique in this paper. The proposed interpolation approach is based on a nonlinear parabolic partial differential equation (PDE) model based on anisotropic diffusion. A novel edge-stopping function is properly modeled for this diffusion-based reconstruction scheme that also uses an inpainting mask. The developed differential model is well-posed, admitting a unique and weak solution that is computed by using a robust finite difference-based numerical approximation scheme. Successful interpolation experiments and method comparison are also described.
{"title":"Nonlinear anisotropic diffusion-based structural inpainting framework","authors":"T. Barbu","doi":"10.1109/TELSKS.2017.8246264","DOIUrl":"https://doi.org/10.1109/TELSKS.2017.8246264","url":null,"abstract":"We consider a novel structure-based image inpainting technique in this paper. The proposed interpolation approach is based on a nonlinear parabolic partial differential equation (PDE) model based on anisotropic diffusion. A novel edge-stopping function is properly modeled for this diffusion-based reconstruction scheme that also uses an inpainting mask. The developed differential model is well-posed, admitting a unique and weak solution that is computed by using a robust finite difference-based numerical approximation scheme. Successful interpolation experiments and method comparison are also described.","PeriodicalId":206778,"journal":{"name":"2017 13th International Conference on Advanced Technologies, Systems and Services in Telecommunications (TELSIKS)","volume":"122 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121520679","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 : 2017-10-01DOI: 10.1109/TELSKS.2017.8246246
A. Lebl, M. Mileusnic, M. Stanić, D. Mitic, V. Matic, Z. Markov
In this paper the influence of packet interleaving on VoIP connection quality (transmission rating factor) is investigated. It is proved that contribution of interleaving in this case depends on a type of coder (compressor), on a percent of packet loss, on a packetization period and on a packet total transmission delay. Depending on a combination of these influencing factors, there are situations when VoIP connection quality is even decreased when interleaving is implemented.
{"title":"Packet interleaving and its influence on the VoIP connection quality","authors":"A. Lebl, M. Mileusnic, M. Stanić, D. Mitic, V. Matic, Z. Markov","doi":"10.1109/TELSKS.2017.8246246","DOIUrl":"https://doi.org/10.1109/TELSKS.2017.8246246","url":null,"abstract":"In this paper the influence of packet interleaving on VoIP connection quality (transmission rating factor) is investigated. It is proved that contribution of interleaving in this case depends on a type of coder (compressor), on a percent of packet loss, on a packetization period and on a packet total transmission delay. Depending on a combination of these influencing factors, there are situations when VoIP connection quality is even decreased when interleaving is implemented.","PeriodicalId":206778,"journal":{"name":"2017 13th International Conference on Advanced Technologies, Systems and Services in Telecommunications (TELSIKS)","volume":"33 1-2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116718990","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 : 2017-10-01DOI: 10.1109/TELSKS.2017.8246305
S. Milan, Masnikosa B. Ina, Zoran Čiča
Nowadays, high quality service is expected from internet providers. Performance monitoring is a key tool in network maintenance and in meeting customer expectations. Network operators are faced with many challenges when it comes to performance monitoring. This paper analyzes key challenges in HFC (Hybrid Fiber-Coax) networks performance monitoring. Special attention is given to HFC network and its components that are used for performance monitoring. We propose list of metrics that need to be monitored in order to extract the quality information about a HFC network condition. The goal of this paper is to give a survey of challenges during performance monitoring in HFC networks and to propose Big Data as a solution to these challenges.
{"title":"Performance monitoring challenges in HFC networks","authors":"S. Milan, Masnikosa B. Ina, Zoran Čiča","doi":"10.1109/TELSKS.2017.8246305","DOIUrl":"https://doi.org/10.1109/TELSKS.2017.8246305","url":null,"abstract":"Nowadays, high quality service is expected from internet providers. Performance monitoring is a key tool in network maintenance and in meeting customer expectations. Network operators are faced with many challenges when it comes to performance monitoring. This paper analyzes key challenges in HFC (Hybrid Fiber-Coax) networks performance monitoring. Special attention is given to HFC network and its components that are used for performance monitoring. We propose list of metrics that need to be monitored in order to extract the quality information about a HFC network condition. The goal of this paper is to give a survey of challenges during performance monitoring in HFC networks and to propose Big Data as a solution to these challenges.","PeriodicalId":206778,"journal":{"name":"2017 13th International Conference on Advanced Technologies, Systems and Services in Telecommunications (TELSIKS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131111065","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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