Pub Date : 2017-07-06DOI: 10.1109/EUROCON.2017.8011128
D. Pavković, Mihael Cipek, M. Hrgetic, Marko Mance
A DC bus control strategy of an actively-controlled battery/ultracapacitor hybrid energy storage system for a full EV is presented in this paper. The control strategy is based on the PI DC bus voltage controller, wherein the DC bus voltage target is determined based on motor voltage demand. A feed-forward load compensator is also included in order to suppress DC bus voltage excursions under highly-variable driveline torque conditions. The superimposed controller commands the current references to the inner current control loops, so that ultracapacitor takes on the highly-dynamic (transient) current demands, while the battery covers for steady-state loads. The proposed control strategy has been verified by means of simulations for the case of electric vehicle being subject to NEDC driving cycle and constant acceleration/deceleration modes in order to reflect realistic EV power-train operating regimes.
{"title":"DC bus feed-forward/feedback control for EVs with battery/ultracapacitor energy storage system","authors":"D. Pavković, Mihael Cipek, M. Hrgetic, Marko Mance","doi":"10.1109/EUROCON.2017.8011128","DOIUrl":"https://doi.org/10.1109/EUROCON.2017.8011128","url":null,"abstract":"A DC bus control strategy of an actively-controlled battery/ultracapacitor hybrid energy storage system for a full EV is presented in this paper. The control strategy is based on the PI DC bus voltage controller, wherein the DC bus voltage target is determined based on motor voltage demand. A feed-forward load compensator is also included in order to suppress DC bus voltage excursions under highly-variable driveline torque conditions. The superimposed controller commands the current references to the inner current control loops, so that ultracapacitor takes on the highly-dynamic (transient) current demands, while the battery covers for steady-state loads. The proposed control strategy has been verified by means of simulations for the case of electric vehicle being subject to NEDC driving cycle and constant acceleration/deceleration modes in order to reflect realistic EV power-train operating regimes.","PeriodicalId":114100,"journal":{"name":"IEEE EUROCON 2017 -17th International Conference on Smart Technologies","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125082917","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 : 2017-07-06DOI: 10.1109/EUROCON.2017.8011131
Beyhan Kilic, Erkan Dursun
Urban metro system consumes huge amount of electrical energy. Therefore, energy consumption, operating costs, and environmental impact of metropolitan transportation should be kept under the control. Capacity expansion and operation costs of urban rail systems are brought forward energy efficiency improvements in the urban rail transportation. Accordingly, there is urgent need to use renewable energy sources and energy efficiency measures for railway systems. Photovoltaic (PV) technology has not been widely applied to railway vehicles. It can lead to considerable reductions in greenhouse gas emissions. In this paper, a feasibility study on the use of PV panels for the interior lighting of the urban rail vehicles was performed. The feasibility study was carried out with HOMER software, which is version 3.1.4. After performing a literature review about integrating renewable energy sources to railway systems, a case study is developed to explore the application of solar energy systems for internal lighting of vehicles having got mathematical models of the solar system. Different scenarios can be calculated with this simulation tool, helping the decision makers when selecting innovative solutions.
{"title":"Integration of innovative photovoltaic technology to the railway trains: A case study for Istanbul airport-M1 light metro line","authors":"Beyhan Kilic, Erkan Dursun","doi":"10.1109/EUROCON.2017.8011131","DOIUrl":"https://doi.org/10.1109/EUROCON.2017.8011131","url":null,"abstract":"Urban metro system consumes huge amount of electrical energy. Therefore, energy consumption, operating costs, and environmental impact of metropolitan transportation should be kept under the control. Capacity expansion and operation costs of urban rail systems are brought forward energy efficiency improvements in the urban rail transportation. Accordingly, there is urgent need to use renewable energy sources and energy efficiency measures for railway systems. Photovoltaic (PV) technology has not been widely applied to railway vehicles. It can lead to considerable reductions in greenhouse gas emissions. In this paper, a feasibility study on the use of PV panels for the interior lighting of the urban rail vehicles was performed. The feasibility study was carried out with HOMER software, which is version 3.1.4. After performing a literature review about integrating renewable energy sources to railway systems, a case study is developed to explore the application of solar energy systems for internal lighting of vehicles having got mathematical models of the solar system. Different scenarios can be calculated with this simulation tool, helping the decision makers when selecting innovative solutions.","PeriodicalId":114100,"journal":{"name":"IEEE EUROCON 2017 -17th International Conference on Smart Technologies","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134530808","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 : 2017-07-06DOI: 10.1109/EUROCON.2017.8011075
Ismail Hburi, H. Al-Raweshidy
This paper addresses the spatial-average analysis of uplink signal to interference ratio (SIR) and throughput in massive MIMO networks with maximum ratio combining (MRC). The analysis incorporates the effects of fractional power control (FPC) and other cells interference (ICI) due to estimation error in channel state information (CSI). Based on an asymptotic approach, tractable expressions are presented for SIR-distributions and specific performance metrics (coverage probability and average rate) in poisson topology model. Moreover, the considered approach is applicable both to random and deterministic network topologies. The impacts of key network-features such as FPC, path-loss exponent and base station (BS) density are characterized. Numerical results validate the model and show that the coverage probability in lower 50th percentile can be maximized by adjusting FPC compensation-fraction between 0.2 and 0.5 depending on the system parameters. Also, for SIR threshold of 0 dB, allocating FPC of 0.25 for uplink transmit power can achieve approximately 6% improvement in coverage probability in cell edge area compared to constant-power policy and about 14% improvement compared to full channel-inversion policy. The provided approximation results can replace the need for lengthy-Monte-Carlo simulations in designing of large scale MIMO systems and quantify the trade-off between improved cell-edge SIR for low and moderate values of FPC.
{"title":"Uplink performance of cellular massive MIMO with fractional power control: Asymptotic analysis","authors":"Ismail Hburi, H. Al-Raweshidy","doi":"10.1109/EUROCON.2017.8011075","DOIUrl":"https://doi.org/10.1109/EUROCON.2017.8011075","url":null,"abstract":"This paper addresses the spatial-average analysis of uplink signal to interference ratio (SIR) and throughput in massive MIMO networks with maximum ratio combining (MRC). The analysis incorporates the effects of fractional power control (FPC) and other cells interference (ICI) due to estimation error in channel state information (CSI). Based on an asymptotic approach, tractable expressions are presented for SIR-distributions and specific performance metrics (coverage probability and average rate) in poisson topology model. Moreover, the considered approach is applicable both to random and deterministic network topologies. The impacts of key network-features such as FPC, path-loss exponent and base station (BS) density are characterized. Numerical results validate the model and show that the coverage probability in lower 50th percentile can be maximized by adjusting FPC compensation-fraction between 0.2 and 0.5 depending on the system parameters. Also, for SIR threshold of 0 dB, allocating FPC of 0.25 for uplink transmit power can achieve approximately 6% improvement in coverage probability in cell edge area compared to constant-power policy and about 14% improvement compared to full channel-inversion policy. The provided approximation results can replace the need for lengthy-Monte-Carlo simulations in designing of large scale MIMO systems and quantify the trade-off between improved cell-edge SIR for low and moderate values of FPC.","PeriodicalId":114100,"journal":{"name":"IEEE EUROCON 2017 -17th International Conference on Smart Technologies","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129111039","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 : 2017-07-06DOI: 10.1109/EUROCON.2017.8011154
Federica Lacirignola, C. Sansoè
Nowadays, the number of divers who want to practice the activity at technical level grows more and more. The Rebreather apparatus can be used to carry out such an experience. This underwater breathing equipment seems to be a complex system, but it is based on a very simple concept: the reuse of the exhaled gas. This apparatus is controlled by an electronic system, a specialized dive computer, that monitors all vital parameters and makes life easier for the diver. This paper presents the control techniques used to manage the oxygen level into the breathing loop, studying all the factors that contribute to its changes during the dive.
{"title":"Oxygen partial pressure management and control loop design of a closed circuit rebreather","authors":"Federica Lacirignola, C. Sansoè","doi":"10.1109/EUROCON.2017.8011154","DOIUrl":"https://doi.org/10.1109/EUROCON.2017.8011154","url":null,"abstract":"Nowadays, the number of divers who want to practice the activity at technical level grows more and more. The Rebreather apparatus can be used to carry out such an experience. This underwater breathing equipment seems to be a complex system, but it is based on a very simple concept: the reuse of the exhaled gas. This apparatus is controlled by an electronic system, a specialized dive computer, that monitors all vital parameters and makes life easier for the diver. This paper presents the control techniques used to manage the oxygen level into the breathing loop, studying all the factors that contribute to its changes during the dive.","PeriodicalId":114100,"journal":{"name":"IEEE EUROCON 2017 -17th International Conference on Smart Technologies","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132168198","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 : 2017-07-06DOI: 10.1109/EUROCON.2017.8011082
A. Uka, Albana Roci, Oktay Koç
Iris recognition is a biometric authentication system proving vital for ensuring security and has been employed as an important case to test the algorithms developed in pattern recognition. The unique circular shape of the iris and its time invariance makes it a versatile technique that has an accuracy that can be mathematically proven. Here in this work we propose a new segmentation technique and two new encoding schemes. The newly proposed techniques are tested on the best, the worst and on all the irises of two widely known databases (CASIA and IIT Delhi database) and the results are compared with the classical segmentation and classical encoding schemes. The segmentation is improved and as a result the accuracy and equal error rate also. In CASIA database the use of the new segmentation improves the EER from 3.14% to 0.82% (on all 756 images of the dataset). When tested on the whole IIT iris database, the EER is improved from 3.88% to 0.34%; and on the worst images of IIT EER is improved from 13.30% to 1.00%.
{"title":"Improved segmentation algorithm and further optimization for iris recognition","authors":"A. Uka, Albana Roci, Oktay Koç","doi":"10.1109/EUROCON.2017.8011082","DOIUrl":"https://doi.org/10.1109/EUROCON.2017.8011082","url":null,"abstract":"Iris recognition is a biometric authentication system proving vital for ensuring security and has been employed as an important case to test the algorithms developed in pattern recognition. The unique circular shape of the iris and its time invariance makes it a versatile technique that has an accuracy that can be mathematically proven. Here in this work we propose a new segmentation technique and two new encoding schemes. The newly proposed techniques are tested on the best, the worst and on all the irises of two widely known databases (CASIA and IIT Delhi database) and the results are compared with the classical segmentation and classical encoding schemes. The segmentation is improved and as a result the accuracy and equal error rate also. In CASIA database the use of the new segmentation improves the EER from 3.14% to 0.82% (on all 756 images of the dataset). When tested on the whole IIT iris database, the EER is improved from 3.88% to 0.34%; and on the worst images of IIT EER is improved from 13.30% to 1.00%.","PeriodicalId":114100,"journal":{"name":"IEEE EUROCON 2017 -17th International Conference on Smart Technologies","volume":"99 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133809388","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 : 2017-07-06DOI: 10.1109/EUROCON.2017.8011169
A. Koziorowska, M. Romerowicz-Misielak, Natalia Gierczak, Sebastian Gniady, M. Koziorowski
The paper shows the results of experiments performed at cultures of the anterior pituitary gland cells of domestic pig (Sus scrofa domestica) in vitro. The cells were subjected to the influence of electromagnetic field of extremely low frequencies (60 and 120 Hz) by two hours. We analyzed the cell cycle progression and the metabolic activity. The analysis of the viability and the cell cycle was performed immediately and 24 hours after the end of the experiment. The presented studies indicate on the antiproliferative properties of an electromagnetic field in the tested range of frequencies (60 and 120Hz) by inhibition of cell cycle progression in G0/G1 phase.
{"title":"Electromagnetic field of extremely low frequency (60Hz and 120Hz) effects the cell cycle progression and the metabolic activity of the anterior pituitary gland cells in vitro","authors":"A. Koziorowska, M. Romerowicz-Misielak, Natalia Gierczak, Sebastian Gniady, M. Koziorowski","doi":"10.1109/EUROCON.2017.8011169","DOIUrl":"https://doi.org/10.1109/EUROCON.2017.8011169","url":null,"abstract":"The paper shows the results of experiments performed at cultures of the anterior pituitary gland cells of domestic pig (Sus scrofa domestica) in vitro. The cells were subjected to the influence of electromagnetic field of extremely low frequencies (60 and 120 Hz) by two hours. We analyzed the cell cycle progression and the metabolic activity. The analysis of the viability and the cell cycle was performed immediately and 24 hours after the end of the experiment. The presented studies indicate on the antiproliferative properties of an electromagnetic field in the tested range of frequencies (60 and 120Hz) by inhibition of cell cycle progression in G0/G1 phase.","PeriodicalId":114100,"journal":{"name":"IEEE EUROCON 2017 -17th International Conference on Smart Technologies","volume":"118 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128154724","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 : 2017-07-06DOI: 10.1109/EUROCON.2017.8011080
A. Uka, X. Polisi, A. Halili, C. Dollinger, N. Vrana
With the recent developments in medicine and biology experiments a large amount of data is gathered in the form of multimedia elements (images, videos). Many algorithms have been developed and adapted based on the system of interest, and often the most challenging feature of the images may be used to facilitate a better analysis of the image. Herein, we developed an image analysis algorithm for quantification of cellular shape and size on micropatterned surfaces (gelatin) as a means to predict their phenotypic behavior. We have two conditions: i) individual dispersal of the cells on the surfaces, and ii) the clustering of cells in small and large patches. The analysis of the former condition, that includes counting and determining of the cells' area, relies on successful segmentation. In the second setting where clustering of cells is favoured, individual cell segmentation and counting becomes more challenging and we determine the relative area that is covered by the cells. Direct image processing techniques can provide a reasonable qualitative picture of the behavior of the cells that sit on the regularly micropatterned surfaces that create a challenging background for the segmentation. Employing filters in both spatial and frequency (reciprocal) domain enabled a better quantitative analysis of the cell behavior. Our method uses the periodic repetition of the patterns to distinguish the cellular features from the topography of the substrate, which can be generalized for the analysis of cellular metrics on micropatterned surfaces.
{"title":"Analysis of cell behavior on micropatterned surfaces by image processing algorithms","authors":"A. Uka, X. Polisi, A. Halili, C. Dollinger, N. Vrana","doi":"10.1109/EUROCON.2017.8011080","DOIUrl":"https://doi.org/10.1109/EUROCON.2017.8011080","url":null,"abstract":"With the recent developments in medicine and biology experiments a large amount of data is gathered in the form of multimedia elements (images, videos). Many algorithms have been developed and adapted based on the system of interest, and often the most challenging feature of the images may be used to facilitate a better analysis of the image. Herein, we developed an image analysis algorithm for quantification of cellular shape and size on micropatterned surfaces (gelatin) as a means to predict their phenotypic behavior. We have two conditions: i) individual dispersal of the cells on the surfaces, and ii) the clustering of cells in small and large patches. The analysis of the former condition, that includes counting and determining of the cells' area, relies on successful segmentation. In the second setting where clustering of cells is favoured, individual cell segmentation and counting becomes more challenging and we determine the relative area that is covered by the cells. Direct image processing techniques can provide a reasonable qualitative picture of the behavior of the cells that sit on the regularly micropatterned surfaces that create a challenging background for the segmentation. Employing filters in both spatial and frequency (reciprocal) domain enabled a better quantitative analysis of the cell behavior. Our method uses the periodic repetition of the patterns to distinguish the cellular features from the topography of the substrate, which can be generalized for the analysis of cellular metrics on micropatterned surfaces.","PeriodicalId":114100,"journal":{"name":"IEEE EUROCON 2017 -17th International Conference on Smart Technologies","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115548854","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 : 2017-07-06DOI: 10.1109/EUROCON.2017.8011162
M. Gusev, A. Guseva
In this paper, we overview current products available on the market, patents, and state-of-the-art of research for cloud solutions based on wearable ECG biosensors. Building a medical cloud that uses such sensors motivates us for a 24h healthcare monitoring service. Furthermore, we identify several challenges, which have to be solved to enable a complete solution for a generic medical cloud capable of communication with medical institutions and caregivers. The analyzed ICT challenges include reception of streaming data from sensors, preprocessing of streams and their storage, automated analysis of received data, monitoring of specific ECG-related data, etc. The analyzed patents can be categorized as methods for 1) measuring ECG, 2) communicating with the main module, 3) managing heart condition and 4) for cardio-physiological mathematical modeling. Only methods for signal communication and management of heart condition based on wearable patched ECG sensors are analyzed in this paper for their application as a cloud-based heart monitoring system.
{"title":"State-of-the-art of cloud solutions based on ECG sensors","authors":"M. Gusev, A. Guseva","doi":"10.1109/EUROCON.2017.8011162","DOIUrl":"https://doi.org/10.1109/EUROCON.2017.8011162","url":null,"abstract":"In this paper, we overview current products available on the market, patents, and state-of-the-art of research for cloud solutions based on wearable ECG biosensors. Building a medical cloud that uses such sensors motivates us for a 24h healthcare monitoring service. Furthermore, we identify several challenges, which have to be solved to enable a complete solution for a generic medical cloud capable of communication with medical institutions and caregivers. The analyzed ICT challenges include reception of streaming data from sensors, preprocessing of streams and their storage, automated analysis of received data, monitoring of specific ECG-related data, etc. The analyzed patents can be categorized as methods for 1) measuring ECG, 2) communicating with the main module, 3) managing heart condition and 4) for cardio-physiological mathematical modeling. Only methods for signal communication and management of heart condition based on wearable patched ECG sensors are analyzed in this paper for their application as a cloud-based heart monitoring system.","PeriodicalId":114100,"journal":{"name":"IEEE EUROCON 2017 -17th International Conference on Smart Technologies","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126261565","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 : 2017-07-06DOI: 10.1109/EUROCON.2017.8011077
N. Ackovska, Vesna Kirandziska
Hardware-based courses, like Robotics, require a lot of laboratory practice. Traditional laboratory exercises on a robotics course are held in a robotics laboratory equipped with proper hardware. Today, besides this kind of traditional laboratories, modern trends are virtual and remote laboratories where simulators are used. In this paper our experiences on the Robotics course, at the Faculty of Computer Science and Engineering in Skopje, with respect to using both traditional and modern laboratories, is presented. This Robotics course is introduced and in more detail the hands-on activities students have on the course are described. We have observed that students' hands-on experience in the laboratory improves their overall score on the course. The results of their performances that support this statement are given in this paper. Also their hands-on experience improves their ability and skills for their independent work on robotics projects. Some examples of the students' projects are presented here.
{"title":"The importance of hands-on experiences in robotics courses","authors":"N. Ackovska, Vesna Kirandziska","doi":"10.1109/EUROCON.2017.8011077","DOIUrl":"https://doi.org/10.1109/EUROCON.2017.8011077","url":null,"abstract":"Hardware-based courses, like Robotics, require a lot of laboratory practice. Traditional laboratory exercises on a robotics course are held in a robotics laboratory equipped with proper hardware. Today, besides this kind of traditional laboratories, modern trends are virtual and remote laboratories where simulators are used. In this paper our experiences on the Robotics course, at the Faculty of Computer Science and Engineering in Skopje, with respect to using both traditional and modern laboratories, is presented. This Robotics course is introduced and in more detail the hands-on activities students have on the course are described. We have observed that students' hands-on experience in the laboratory improves their overall score on the course. The results of their performances that support this statement are given in this paper. Also their hands-on experience improves their ability and skills for their independent work on robotics projects. Some examples of the students' projects are presented here.","PeriodicalId":114100,"journal":{"name":"IEEE EUROCON 2017 -17th International Conference on Smart Technologies","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130754099","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 : 2017-07-06DOI: 10.1109/EUROCON.2017.8011071
T. Manglayev, Refik Caglar Kizilirmak, Y. Kho, Nurzhan Bazhayev, I. Lebedev
In this paper, non-orthogonal multiple access (NOMA) with successive interference cancellation (SIC) technique for downlink channel of next generation wireless network and its security issues are discussed. In NOMA, signals for all user equipment (UEs) are superimposed before transmission and then decoded at each UE implementing SIC. SIC relies on decoding and subtracting the signals in sequence until it reaches its desired signal. The decoding order at each UE, however, must match with the user index in the cancellation sequence. In case of mismatch, UEs will not obtain their signals and re-request their messages from the BS which will further increase the processing time that is already high for a regular SIC receiver. Numerical results show the performance of SIC at the UE side. The time spent for decoding the received signal at the UE with and without user mismatch is discussed. The unusual longer decoding times are further discussed as potential external network threat.
{"title":"NOMA with imperfect SIC implementation","authors":"T. Manglayev, Refik Caglar Kizilirmak, Y. Kho, Nurzhan Bazhayev, I. Lebedev","doi":"10.1109/EUROCON.2017.8011071","DOIUrl":"https://doi.org/10.1109/EUROCON.2017.8011071","url":null,"abstract":"In this paper, non-orthogonal multiple access (NOMA) with successive interference cancellation (SIC) technique for downlink channel of next generation wireless network and its security issues are discussed. In NOMA, signals for all user equipment (UEs) are superimposed before transmission and then decoded at each UE implementing SIC. SIC relies on decoding and subtracting the signals in sequence until it reaches its desired signal. The decoding order at each UE, however, must match with the user index in the cancellation sequence. In case of mismatch, UEs will not obtain their signals and re-request their messages from the BS which will further increase the processing time that is already high for a regular SIC receiver. Numerical results show the performance of SIC at the UE side. The time spent for decoding the received signal at the UE with and without user mismatch is discussed. The unusual longer decoding times are further discussed as potential external network threat.","PeriodicalId":114100,"journal":{"name":"IEEE EUROCON 2017 -17th International Conference on Smart Technologies","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114086380","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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