Pub Date : 2017-10-01DOI: 10.1109/TELSKS.2017.8246229
P. Spalević, B. Jaksic, I. Milovanovic, M. Veinovic, M. Petrovic
In this paper, the influence of the basic parameters of the satellite transponder on its capacity is analyzed. Using DVB Calculator, the influence of modulation formats (QPSK, 8PSK, 16APSK and 32APSK), FEC parameters, Roll-Off factors and Frame Length on Bit Rate and Symbol Rate of satellite transponder are analyzed. The table shows the Bit Rate for various DVB-S and DVB-S2 standard combinations.
{"title":"Influence of the parameters of the DVB-S/S2 standards on the capacity of a satellite transponder","authors":"P. Spalević, B. Jaksic, I. Milovanovic, M. Veinovic, M. Petrovic","doi":"10.1109/TELSKS.2017.8246229","DOIUrl":"https://doi.org/10.1109/TELSKS.2017.8246229","url":null,"abstract":"In this paper, the influence of the basic parameters of the satellite transponder on its capacity is analyzed. Using DVB Calculator, the influence of modulation formats (QPSK, 8PSK, 16APSK and 32APSK), FEC parameters, Roll-Off factors and Frame Length on Bit Rate and Symbol Rate of satellite transponder are analyzed. The table shows the Bit Rate for various DVB-S and DVB-S2 standard combinations.","PeriodicalId":206778,"journal":{"name":"2017 13th International Conference on Advanced Technologies, Systems and Services in Telecommunications (TELSIKS)","volume":"67 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":"129038052","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.2017.8246311
Igor Stanivuk, V. Bjelić, T. Samardzic, Đorđe Simić
Lua API does not contain functions needed for executing HTTP/HTTPS requests. This paper deals with the implementation of support of HTTP/HTTPS protocol for Lua interface. Aim of this work is the extension of Lua API for support of synchronous and asynchronous HTTP requests. This is achieved using C++ programming language and cURL open source library.
{"title":"Expanding lua interface to support HTTP/HTTPS protocol","authors":"Igor Stanivuk, V. Bjelić, T. Samardzic, Đorđe Simić","doi":"10.1109/TELSKS.2017.8246311","DOIUrl":"https://doi.org/10.1109/TELSKS.2017.8246311","url":null,"abstract":"Lua API does not contain functions needed for executing HTTP/HTTPS requests. This paper deals with the implementation of support of HTTP/HTTPS protocol for Lua interface. Aim of this work is the extension of Lua API for support of synchronous and asynchronous HTTP requests. This is achieved using C++ programming language and cURL open source library.","PeriodicalId":206778,"journal":{"name":"2017 13th International Conference on Advanced Technologies, Systems and Services in Telecommunications (TELSIKS)","volume":"11 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":"125261395","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.2017.8246277
Christos Zarafetas, N. Makris, A. Apostolaras, T. Korakis, L. Tassiulas
Ultra-dense networks are expected to be the vehicle for better network coverage featuring higher speeds, augmented network capacity and more per cell end-users served. Towards meeting these stiff requirements, cells of varying coverage (pico-/femto-/macro-cells) are being deployed, especially in densely populated urban areas. Considering the high availability of such equipment, as well as the low deployment and maintenance costs of WLAN networks, an ecosystem rich in heterogeneity may assist in extending the overall network capacity, thus enabling throughput-hungry services to be offered over contemporary networks. The solution that is considered in this paper is offloading macro-cell users to the available wireless networks in a geographical area, while meeting their demands for the downlink channel. We model our problem and present an applied framework that facilitates cross-technology offloading. Our solution is making use of Software Defined Networking, thus enabling the very rapid and low latency network switching. We experimentally evaluate and benchmark our framework in a real testbed setup, and present our findings.
{"title":"Flexible cross-technology offloading using SDN","authors":"Christos Zarafetas, N. Makris, A. Apostolaras, T. Korakis, L. Tassiulas","doi":"10.1109/TELSKS.2017.8246277","DOIUrl":"https://doi.org/10.1109/TELSKS.2017.8246277","url":null,"abstract":"Ultra-dense networks are expected to be the vehicle for better network coverage featuring higher speeds, augmented network capacity and more per cell end-users served. Towards meeting these stiff requirements, cells of varying coverage (pico-/femto-/macro-cells) are being deployed, especially in densely populated urban areas. Considering the high availability of such equipment, as well as the low deployment and maintenance costs of WLAN networks, an ecosystem rich in heterogeneity may assist in extending the overall network capacity, thus enabling throughput-hungry services to be offered over contemporary networks. The solution that is considered in this paper is offloading macro-cell users to the available wireless networks in a geographical area, while meeting their demands for the downlink channel. We model our problem and present an applied framework that facilitates cross-technology offloading. Our solution is making use of Software Defined Networking, thus enabling the very rapid and low latency network switching. We experimentally evaluate and benchmark our framework in a real testbed setup, and present our findings.","PeriodicalId":206778,"journal":{"name":"2017 13th International Conference on Advanced Technologies, Systems and Services in Telecommunications (TELSIKS)","volume":"7 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":"128162949","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.2017.8246285
P. Ivaniš, Srdan Brkic, B. Vasic
This paper contains a survey on iterative decoders of low-density parity-check (LDPC) codes made of unreliable logic gates that are capable to provide lower probability of error, when compared to their perfectly reliable counterparts. We have recently shown that the error-floor performance of message-passing decoders can be improved, if randomness that exists in unreliable logic gates is incorporated into decoding deliberately, without any complexity cost. Furthermore, we have shown that controlling the level of unreliability enable us to exploit the stochastic resonance phenomenon, previously observed in theoretical physics, electronic and magnetic systems. In contrary to common belief, we have shown that for a narrow range of gate failure probability the overall decoding performance is dramatically increased. In this paper, we show that the effect of stochastic resonance is even more noticeable for the case of the gradient descent bit-flipping (GDBF) algorithm. This decoder combines the simplest iterative decoding algorithm with gradient descent optimization, making it an attractive solution for a variety of low complexity storage systems, or code-based cryptosystems. In addition, we show that getting the most of the stochastic resonance is essentially a deep learning problem, since setting the levels of unreliability for individual parts of the decoder by a training process is a step toward incorporating the machine learning techniques into design and analysis of iterative decoders of LDPC codes.
{"title":"Stochastic resonance in iterative decoding: Message passing and gradient descent bit flipping","authors":"P. Ivaniš, Srdan Brkic, B. Vasic","doi":"10.1109/TELSKS.2017.8246285","DOIUrl":"https://doi.org/10.1109/TELSKS.2017.8246285","url":null,"abstract":"This paper contains a survey on iterative decoders of low-density parity-check (LDPC) codes made of unreliable logic gates that are capable to provide lower probability of error, when compared to their perfectly reliable counterparts. We have recently shown that the error-floor performance of message-passing decoders can be improved, if randomness that exists in unreliable logic gates is incorporated into decoding deliberately, without any complexity cost. Furthermore, we have shown that controlling the level of unreliability enable us to exploit the stochastic resonance phenomenon, previously observed in theoretical physics, electronic and magnetic systems. In contrary to common belief, we have shown that for a narrow range of gate failure probability the overall decoding performance is dramatically increased. In this paper, we show that the effect of stochastic resonance is even more noticeable for the case of the gradient descent bit-flipping (GDBF) algorithm. This decoder combines the simplest iterative decoding algorithm with gradient descent optimization, making it an attractive solution for a variety of low complexity storage systems, or code-based cryptosystems. In addition, we show that getting the most of the stochastic resonance is essentially a deep learning problem, since setting the levels of unreliability for individual parts of the decoder by a training process is a step toward incorporating the machine learning techniques into design and analysis of iterative decoders of LDPC codes.","PeriodicalId":206778,"journal":{"name":"2017 13th International Conference on Advanced Technologies, Systems and Services in Telecommunications (TELSIKS)","volume":"89 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":"125119334","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.2017.8246261
I. Jokic, S. Jokic, V. Delić, Z. Perić
There is a similarity between algorithm for automatic speaker recognition, speech or emotion recognition in speech, and in general automatic sound recognition. Algorithm based on use of mel-frequency cepstral coefficients and covariance matrices, previously used for automatic speaker recognition, is extended to automatic sound recognition. One example of using application for automatic sound recognition is presented. This application can show the similarity between different acoustical environments.
{"title":"Towards enabling measurement of similarity of acoustical environments using mobile devices","authors":"I. Jokic, S. Jokic, V. Delić, Z. Perić","doi":"10.1109/TELSKS.2017.8246261","DOIUrl":"https://doi.org/10.1109/TELSKS.2017.8246261","url":null,"abstract":"There is a similarity between algorithm for automatic speaker recognition, speech or emotion recognition in speech, and in general automatic sound recognition. Algorithm based on use of mel-frequency cepstral coefficients and covariance matrices, previously used for automatic speaker recognition, is extended to automatic sound recognition. One example of using application for automatic sound recognition is presented. This application can show the similarity between different acoustical environments.","PeriodicalId":206778,"journal":{"name":"2017 13th International Conference on Advanced Technologies, Systems and Services in Telecommunications (TELSIKS)","volume":"62 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":"123813199","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.2017.8246304
A. Cvetkovic, J. Anastasov, D. Milovic, Dejan N. Milic, Z. Marjanovic
In this work, performance analysis of cooperative diversity networks with selfish protocol over Nakagami-m fading corrupted links is presented. Namely, ergodic and outage capacity for wireless decode-and-forward networks is defined. Linking on the expression for outage probability, the expression for outage capacity is derived. Also, closed-form solution of ergodic capacity with admissible restriction on fading parameter being integer, is presented. The overall analysis gives us insights as to how fade depths across the cooperative paths, number of active users in network, outage threshold or different average signal-to-noise ratio values affect the capacity.
{"title":"Outage and ergodic capacity analysis of wireless networks with selfish cooperation","authors":"A. Cvetkovic, J. Anastasov, D. Milovic, Dejan N. Milic, Z. Marjanovic","doi":"10.1109/TELSKS.2017.8246304","DOIUrl":"https://doi.org/10.1109/TELSKS.2017.8246304","url":null,"abstract":"In this work, performance analysis of cooperative diversity networks with selfish protocol over Nakagami-m fading corrupted links is presented. Namely, ergodic and outage capacity for wireless decode-and-forward networks is defined. Linking on the expression for outage probability, the expression for outage capacity is derived. Also, closed-form solution of ergodic capacity with admissible restriction on fading parameter being integer, is presented. The overall analysis gives us insights as to how fade depths across the cooperative paths, number of active users in network, outage threshold or different average signal-to-noise ratio values affect the capacity.","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":"131864131","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.2017.8246318
N. Kovačić, Velibor Ilic, Aleksandar Korać, Aleksandar Zejak, Bogdan Pavković
Modern embedded multiprocessor systems with multi-core processors are very complex computer systems with sophisticated software which is often used in distributed hardware platforms in automotive. Primary issue that should be worked on when designing such systems is the connection between timing and quality control. Suchlike systems function exclusively in accordance with static schedule of beforehand defined tasks. This paper introduces one solution which allows simpler check of order and duration of processes performed by automotive embedded devices, for the purpose of quick detection of problems with certain task, by comparing static schedule with the real duration of task execution and provides visual display of tasks. Improving quality and accuracy of automotive embedded systems leads to better real-time performances which was the main reason for finding out this solution. Time triggered systems in automotive are based on FlexRay protocol than functions on principle of event chains. In order to optimize suchlike system it is necessary to process data in the most efficient way and show possible oversights of the system. The paper shows how, on the bases of input data, comparison with recorded traffic or real time data was performed. Visual results show differences between static and real schedule of tasks. Also, results could be shown in tables, and histogram, including exceeding performance time of tasks.
{"title":"Validation of process execution on automotive embedded devices","authors":"N. Kovačić, Velibor Ilic, Aleksandar Korać, Aleksandar Zejak, Bogdan Pavković","doi":"10.1109/TELSKS.2017.8246318","DOIUrl":"https://doi.org/10.1109/TELSKS.2017.8246318","url":null,"abstract":"Modern embedded multiprocessor systems with multi-core processors are very complex computer systems with sophisticated software which is often used in distributed hardware platforms in automotive. Primary issue that should be worked on when designing such systems is the connection between timing and quality control. Suchlike systems function exclusively in accordance with static schedule of beforehand defined tasks. This paper introduces one solution which allows simpler check of order and duration of processes performed by automotive embedded devices, for the purpose of quick detection of problems with certain task, by comparing static schedule with the real duration of task execution and provides visual display of tasks. Improving quality and accuracy of automotive embedded systems leads to better real-time performances which was the main reason for finding out this solution. Time triggered systems in automotive are based on FlexRay protocol than functions on principle of event chains. In order to optimize suchlike system it is necessary to process data in the most efficient way and show possible oversights of the system. The paper shows how, on the bases of input data, comparison with recorded traffic or real time data was performed. Visual results show differences between static and real schedule of tasks. Also, results could be shown in tables, and histogram, including exceeding performance time of tasks.","PeriodicalId":206778,"journal":{"name":"2017 13th International Conference on Advanced Technologies, Systems and Services in Telecommunications (TELSIKS)","volume":"38 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":"132370814","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.2017.8246231
V. Kosjer, Nemanja Popovic, Nemanja Fimic, Nenad Soskic
Android multimedia environment is extended with support for adaptive transport protocols, since by default it cannot play video content which is adapted in real time to different data bit rates. Paper describes one solution of Android multimedia software extension for playback and control of adaptive bit rate transport streams, in order to play live transport streams. Android Media Server will choose the best support for reproduction of incoming stream. For M3U8 data format, HLS support will be used.
{"title":"Android multimedia environment extension with support for adaptive transport protocol","authors":"V. Kosjer, Nemanja Popovic, Nemanja Fimic, Nenad Soskic","doi":"10.1109/TELSKS.2017.8246231","DOIUrl":"https://doi.org/10.1109/TELSKS.2017.8246231","url":null,"abstract":"Android multimedia environment is extended with support for adaptive transport protocols, since by default it cannot play video content which is adapted in real time to different data bit rates. Paper describes one solution of Android multimedia software extension for playback and control of adaptive bit rate transport streams, in order to play live transport streams. Android Media Server will choose the best support for reproduction of incoming stream. For M3U8 data format, HLS support will be used.","PeriodicalId":206778,"journal":{"name":"2017 13th International Conference on Advanced Technologies, Systems and Services in Telecommunications (TELSIKS)","volume":"29 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":"134564621","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.2017.8246257
A. Petrocchi, A. Raffo, G. Avolio, K. Lukasik, D. Resca, G. Vannini, S. Lemey, O. Caytan, S. Agneessens, H. Rogier, D. Schreurs
In this paper, we present an ultra-wideband impedance sensing board for the radio-frequency front-ends used in wireless units for the Internet of Things and the fifth-generation wireless communication systems. We adopt as an impedance sensing board a six-port junction which was designed, fabricated, and tested experimentally in the frequency range from 5 GHz to 6 GHz. Moreover, the sensing board functionality was fully validated with load-pull measurements carried out in the same frequency range.
{"title":"An ultra-wideband sensing board for IoT","authors":"A. Petrocchi, A. Raffo, G. Avolio, K. Lukasik, D. Resca, G. Vannini, S. Lemey, O. Caytan, S. Agneessens, H. Rogier, D. Schreurs","doi":"10.1109/TELSKS.2017.8246257","DOIUrl":"https://doi.org/10.1109/TELSKS.2017.8246257","url":null,"abstract":"In this paper, we present an ultra-wideband impedance sensing board for the radio-frequency front-ends used in wireless units for the Internet of Things and the fifth-generation wireless communication systems. We adopt as an impedance sensing board a six-port junction which was designed, fabricated, and tested experimentally in the frequency range from 5 GHz to 6 GHz. Moreover, the sensing board functionality was fully validated with load-pull measurements carried out in the same frequency range.","PeriodicalId":206778,"journal":{"name":"2017 13th International Conference on Advanced Technologies, Systems and Services in Telecommunications (TELSIKS)","volume":"32 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":"133933151","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.2017.8246237
H. Aslani, A. Elkorany, A. Radwan
In this paper, we present a novel wide band microstrip patch antenna (MPA) antenna configuration that can be used for UWB applications. The proposed antenna has an enhanced impedance bandwidth based on using slots in the patch as an improved technique. An impedance bandwidth between 5–11 GHz has been achieved. The antenna performance has been characterized in terms of reflection coefficient (S11), peak gain and radiation characteristics.
{"title":"Compact efficient UWB antenna based on multiple slots","authors":"H. Aslani, A. Elkorany, A. Radwan","doi":"10.1109/TELSKS.2017.8246237","DOIUrl":"https://doi.org/10.1109/TELSKS.2017.8246237","url":null,"abstract":"In this paper, we present a novel wide band microstrip patch antenna (MPA) antenna configuration that can be used for UWB applications. The proposed antenna has an enhanced impedance bandwidth based on using slots in the patch as an improved technique. An impedance bandwidth between 5–11 GHz has been achieved. The antenna performance has been characterized in terms of reflection coefficient (S11), peak gain and radiation characteristics.","PeriodicalId":206778,"journal":{"name":"2017 13th International Conference on Advanced Technologies, Systems and Services in Telecommunications (TELSIKS)","volume":"47 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":"125531801","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：