Pub Date : 2016-07-20DOI: 10.1109/CSNDSP.2016.7574033
Mohammad Reza Alizadeh, G. Baghersalimi, Mohamad Rahimi, M. Najafi, Xuan Tang
Radio-over-fiber (RoF) is a technology in which a radio system seeking to access a wider bandwidth, uses optical methods and tools to distribute information. This research is an attempt to assess and compensate for the nonlinearity of an optical subsystem in a multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) based RoF system with a radio subsystem in an additive white Gaussian noise (AWGN) channel. By employing Alamouti code as a kind of orthogonal space-time block coding (OSTBC), we demonstrated improvement some systems performance.
{"title":"Performance improvement of a MIMO-OFDM based radio-over-fiber system using Alamouti coding: AWGN scenario","authors":"Mohammad Reza Alizadeh, G. Baghersalimi, Mohamad Rahimi, M. Najafi, Xuan Tang","doi":"10.1109/CSNDSP.2016.7574033","DOIUrl":"https://doi.org/10.1109/CSNDSP.2016.7574033","url":null,"abstract":"Radio-over-fiber (RoF) is a technology in which a radio system seeking to access a wider bandwidth, uses optical methods and tools to distribute information. This research is an attempt to assess and compensate for the nonlinearity of an optical subsystem in a multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) based RoF system with a radio subsystem in an additive white Gaussian noise (AWGN) channel. By employing Alamouti code as a kind of orthogonal space-time block coding (OSTBC), we demonstrated improvement some systems performance.","PeriodicalId":298711,"journal":{"name":"2016 10th International Symposium on Communication Systems, Networks and Digital Signal Processing (CSNDSP)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117099517","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 : 2016-07-20DOI: 10.1109/CSNDSP.2016.7573949
Luís Duarte, Luís Rodrigues, L. N. Alves, Carlos Ribeiro, M. Figueiredo
This paper addresses the problem of achieving high bandwidth in a DLL design for OFDM based VLC broadcast systems. It describes the implementation of efficient Data Link Layer (DLL) and Forward Error Correction (FEC) modules in a Xilinx FPGA. The proposed DLL aims at furnishing the adequate means to fragment and route both high data-rate (HDR) and moderate data-rate (MDR) service requests while maintaining a continuous transmission flow. The FEC modules aims at providing sufficient error correction capabilities with reasonable computation overheads. Another goal was to develop these modules under a globally asynchronous locally synchronous paradigm, ensuring high modularity and performance.
{"title":"DLL architecture for OFDM based VLC transceivers in FPGA","authors":"Luís Duarte, Luís Rodrigues, L. N. Alves, Carlos Ribeiro, M. Figueiredo","doi":"10.1109/CSNDSP.2016.7573949","DOIUrl":"https://doi.org/10.1109/CSNDSP.2016.7573949","url":null,"abstract":"This paper addresses the problem of achieving high bandwidth in a DLL design for OFDM based VLC broadcast systems. It describes the implementation of efficient Data Link Layer (DLL) and Forward Error Correction (FEC) modules in a Xilinx FPGA. The proposed DLL aims at furnishing the adequate means to fragment and route both high data-rate (HDR) and moderate data-rate (MDR) service requests while maintaining a continuous transmission flow. The FEC modules aims at providing sufficient error correction capabilities with reasonable computation overheads. Another goal was to develop these modules under a globally asynchronous locally synchronous paradigm, ensuring high modularity and performance.","PeriodicalId":298711,"journal":{"name":"2016 10th International Symposium on Communication Systems, Networks and Digital Signal Processing (CSNDSP)","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129479468","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 : 2016-07-20DOI: 10.1109/CSNDSP.2016.7573909
M. Sobieraj, P. Zwierzykowski
This article proposes a new calculation method for a determination of traffic characteristics in switching networks with multiservice traffic sources carrying multicast traffic. The analytical method described in the paper can be used to determine the point-to-point blocking probability in switching networks with multicast connections. In this method, each traffic source can generate calls of different service classes. The proposed calculation method is approximate, therefore the results of calculations are compared with the results of simulation experiments. The simulation results confirm acceptable accuracy of the proposed analytical method.
{"title":"Blocking probability in switching networks with multi-service sources and multicast traffic","authors":"M. Sobieraj, P. Zwierzykowski","doi":"10.1109/CSNDSP.2016.7573909","DOIUrl":"https://doi.org/10.1109/CSNDSP.2016.7573909","url":null,"abstract":"This article proposes a new calculation method for a determination of traffic characteristics in switching networks with multiservice traffic sources carrying multicast traffic. The analytical method described in the paper can be used to determine the point-to-point blocking probability in switching networks with multicast connections. In this method, each traffic source can generate calls of different service classes. The proposed calculation method is approximate, therefore the results of calculations are compared with the results of simulation experiments. The simulation results confirm acceptable accuracy of the proposed analytical method.","PeriodicalId":298711,"journal":{"name":"2016 10th International Symposium on Communication Systems, Networks and Digital Signal Processing (CSNDSP)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129911790","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 : 2016-07-20DOI: 10.1109/CSNDSP.2016.7573948
Zahir Ahmad, Pascal Geisar, Omar Salih, S. Rajbhandari
This paper presents the design, development and test of an underwater visible light communication system for the deep sea divers. To achieve a practical communication range, frequency modulation technique has been utilized to modulate the voice signal which is eventually transmitted using visible light. Blue and green light emitting diodes have been chosen to design a full duplex system for simultaneous communication. The proposed system achieved a bidirectional communication range of approximately 3.5 m using off-the-shelf components and without using any optical concentrator.
{"title":"Design of a visible light communication system for deep sea divers based on analogue frequency modulation","authors":"Zahir Ahmad, Pascal Geisar, Omar Salih, S. Rajbhandari","doi":"10.1109/CSNDSP.2016.7573948","DOIUrl":"https://doi.org/10.1109/CSNDSP.2016.7573948","url":null,"abstract":"This paper presents the design, development and test of an underwater visible light communication system for the deep sea divers. To achieve a practical communication range, frequency modulation technique has been utilized to modulate the voice signal which is eventually transmitted using visible light. Blue and green light emitting diodes have been chosen to design a full duplex system for simultaneous communication. The proposed system achieved a bidirectional communication range of approximately 3.5 m using off-the-shelf components and without using any optical concentrator.","PeriodicalId":298711,"journal":{"name":"2016 10th International Symposium on Communication Systems, Networks and Digital Signal Processing (CSNDSP)","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129235755","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 : 2016-07-20DOI: 10.1109/CSNDSP.2016.7573918
Barbara Suesser-Rechberger, W. Gappmair, A. Ginesi
In Annex E of the extension to the new standard for digital video broadcasting (DVB) via satellite, usually abbreviated as DVB-S2x, Walsh-Hadamard (WH) codes are suggested as preambles of data frames. Due to their orthogonality property, WH codes are most welcome for parameter estimation and synchronization in a multibeam scenario. In the current paper, these codes are investigated with respect to symbol timing recovery. For this purpose, we focus on a low-complex estimator by using a data-aided approach without any knowledge about carrier frequency/phase, which makes the method perfectly suited for initial acquisition. It is verified that the algorithm is unbiased and that the jitter performance is close to the Cramer-Rao lower bound. Employing this theoretical figure to select the WH words of interest, we are able to circumvent cumbersome and lengthy simulation runs. Numerical results reflect different aspects of a multibeam scenario.
{"title":"Performance of Walsh-Hadamard codes used for timing recovery in a DVB-S2x multibeam scenario","authors":"Barbara Suesser-Rechberger, W. Gappmair, A. Ginesi","doi":"10.1109/CSNDSP.2016.7573918","DOIUrl":"https://doi.org/10.1109/CSNDSP.2016.7573918","url":null,"abstract":"In Annex E of the extension to the new standard for digital video broadcasting (DVB) via satellite, usually abbreviated as DVB-S2x, Walsh-Hadamard (WH) codes are suggested as preambles of data frames. Due to their orthogonality property, WH codes are most welcome for parameter estimation and synchronization in a multibeam scenario. In the current paper, these codes are investigated with respect to symbol timing recovery. For this purpose, we focus on a low-complex estimator by using a data-aided approach without any knowledge about carrier frequency/phase, which makes the method perfectly suited for initial acquisition. It is verified that the algorithm is unbiased and that the jitter performance is close to the Cramer-Rao lower bound. Employing this theoretical figure to select the WH words of interest, we are able to circumvent cumbersome and lengthy simulation runs. Numerical results reflect different aspects of a multibeam scenario.","PeriodicalId":298711,"journal":{"name":"2016 10th International Symposium on Communication Systems, Networks and Digital Signal Processing (CSNDSP)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123607972","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 : 2016-07-20DOI: 10.1109/CSNDSP.2016.7573962
A. M. Ramirez-Aguilera, J. M. Luna-Rivera, V. Guerra, J. A. R. Borges, R. P. Jiménez, F. J. López-Hernández
In this paper we present a compact and efficient method for the calculation of the channel response over indoor wireless optical channel for multi-wavelength signals. It is based on the Modified Montecarlo Algorithm but allows not only processing composed signals as used in VLC transmission with white or RGB LED emitters, but also modeling reflections where wavelength components of the incoming signals are modified, as could be the case of phosphor materials or wavelength-dependent reflecting surfaces. It also allows modeling not only lambertian reflections but also non-lambertian, quasi-specular surface, as could be plastic or metallic furniture. The algorithm uses a wavelength transformation matrix that can be defined for each reflecting material, and even for each incidence angle.
{"title":"Multi-wavelength modelling for VLC indoor channels using Montecarlo simulation","authors":"A. M. Ramirez-Aguilera, J. M. Luna-Rivera, V. Guerra, J. A. R. Borges, R. P. Jiménez, F. J. López-Hernández","doi":"10.1109/CSNDSP.2016.7573962","DOIUrl":"https://doi.org/10.1109/CSNDSP.2016.7573962","url":null,"abstract":"In this paper we present a compact and efficient method for the calculation of the channel response over indoor wireless optical channel for multi-wavelength signals. It is based on the Modified Montecarlo Algorithm but allows not only processing composed signals as used in VLC transmission with white or RGB LED emitters, but also modeling reflections where wavelength components of the incoming signals are modified, as could be the case of phosphor materials or wavelength-dependent reflecting surfaces. It also allows modeling not only lambertian reflections but also non-lambertian, quasi-specular surface, as could be plastic or metallic furniture. The algorithm uses a wavelength transformation matrix that can be defined for each reflecting material, and even for each incidence angle.","PeriodicalId":298711,"journal":{"name":"2016 10th International Symposium on Communication Systems, Networks and Digital Signal Processing (CSNDSP)","volume":"360 15","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114097701","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 : 2016-07-20DOI: 10.1109/CSNDSP.2016.7573990
Zichao Zhou, Xueying Yuan, J. Ilow
This paper develops a time scheduling scheme for generalized K-user multiple-input multiple-output (MIMO) Y channels where multiple terminals communicate with each other in a bi-directional manner via the relay. The objective is to decrease the system configuration requirements in terms of antenna numbers at the relay station and user nodes. Specifically, the scheme splits the user nodes into multiple groups and spreads the transmissions over a larger number of time slots (TSs) compared with the original MIMO Y channel scheme. While the latter scheme uses only one medium access control (MAC) and one broadcast (BC) phase, the proposed time scheduling arranges bi-directional data exchanges using specialized precoding in two or more MAC and BC phases between smaller number of users. As a result, the required numbers of antennas at the relay and the user nodes are decreased at the expense of reduced effective throughput. The lower complexity antenna configurations in MIMO Y channels will make the whole system more amenable to practical implementations.
{"title":"A time scheduling scheme in MIMO Y channels with reduced antenna configurations","authors":"Zichao Zhou, Xueying Yuan, J. Ilow","doi":"10.1109/CSNDSP.2016.7573990","DOIUrl":"https://doi.org/10.1109/CSNDSP.2016.7573990","url":null,"abstract":"This paper develops a time scheduling scheme for generalized K-user multiple-input multiple-output (MIMO) Y channels where multiple terminals communicate with each other in a bi-directional manner via the relay. The objective is to decrease the system configuration requirements in terms of antenna numbers at the relay station and user nodes. Specifically, the scheme splits the user nodes into multiple groups and spreads the transmissions over a larger number of time slots (TSs) compared with the original MIMO Y channel scheme. While the latter scheme uses only one medium access control (MAC) and one broadcast (BC) phase, the proposed time scheduling arranges bi-directional data exchanges using specialized precoding in two or more MAC and BC phases between smaller number of users. As a result, the required numbers of antennas at the relay and the user nodes are decreased at the expense of reduced effective throughput. The lower complexity antenna configurations in MIMO Y channels will make the whole system more amenable to practical implementations.","PeriodicalId":298711,"journal":{"name":"2016 10th International Symposium on Communication Systems, Networks and Digital Signal Processing (CSNDSP)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126422119","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 : 2016-07-20DOI: 10.1109/CSNDSP.2016.7574000
M. Rozman, Augustine Ikpehai, B. Adebisi, Khaled Maaiuf Rabie
Power line communication (PLC) technology offers a promising platform for numerous communication applications. The power lines however can significantly attenuate communication signals operating in high frequency band. For this reason, multi-hop PLC systems become desirable. In this paper, we investigates the effect of multi-hop relaying on the power line channel transfer function. Measured results are compared with results obtained from sumulations in Matlab. Results show that the presence of relays between a transmitting and a receiving PLC nodes can intensify the attenuation and frequency selectivity. Measurements show that maximum attenuation increases with number of relays.
{"title":"Channel characterisation of cooperative relaying power line communication systems","authors":"M. Rozman, Augustine Ikpehai, B. Adebisi, Khaled Maaiuf Rabie","doi":"10.1109/CSNDSP.2016.7574000","DOIUrl":"https://doi.org/10.1109/CSNDSP.2016.7574000","url":null,"abstract":"Power line communication (PLC) technology offers a promising platform for numerous communication applications. The power lines however can significantly attenuate communication signals operating in high frequency band. For this reason, multi-hop PLC systems become desirable. In this paper, we investigates the effect of multi-hop relaying on the power line channel transfer function. Measured results are compared with results obtained from sumulations in Matlab. Results show that the presence of relays between a transmitting and a receiving PLC nodes can intensify the attenuation and frequency selectivity. Measurements show that maximum attenuation increases with number of relays.","PeriodicalId":298711,"journal":{"name":"2016 10th International Symposium on Communication Systems, Networks and Digital Signal Processing (CSNDSP)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128062456","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 : 2016-07-20DOI: 10.1109/CSNDSP.2016.7574023
Ammar Hadi, E. Alsusa, Khaled Maaiuf Rabie
Polar codes are regarded as a major breakthrough in modern channel coding since they are capacity-achieving using simple successive cancellation (SC) decoding. However, this is only possible with significantly large code lengths which may not be applicable for many systems. In this paper, we focus on short length polar codes and present a method which can enhance the performance of the successive cancellation decoder. For the purpose of analysis, we discuss the SC code tree and show how the proposed method can improve the performance by increasing the computational nodes in the code tree. The results quantify the achieved performance improvement over the conventional SC decoder.
{"title":"A method to enhance the performance of successive cancellation decoding in polar codes","authors":"Ammar Hadi, E. Alsusa, Khaled Maaiuf Rabie","doi":"10.1109/CSNDSP.2016.7574023","DOIUrl":"https://doi.org/10.1109/CSNDSP.2016.7574023","url":null,"abstract":"Polar codes are regarded as a major breakthrough in modern channel coding since they are capacity-achieving using simple successive cancellation (SC) decoding. However, this is only possible with significantly large code lengths which may not be applicable for many systems. In this paper, we focus on short length polar codes and present a method which can enhance the performance of the successive cancellation decoder. For the purpose of analysis, we discuss the SC code tree and show how the proposed method can improve the performance by increasing the computational nodes in the code tree. The results quantify the achieved performance improvement over the conventional SC decoder.","PeriodicalId":298711,"journal":{"name":"2016 10th International Symposium on Communication Systems, Networks and Digital Signal Processing (CSNDSP)","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130941360","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 : 2016-07-20DOI: 10.1109/CSNDSP.2016.7573928
J. Kupferman, S. Arnon
A data center (DC) is one of the main building blocks of the internet. Any intra DC network should strive to achieve high throughput, while continuing to be flexible in responding to changing traffic patterns. Optical wireless communication links on top of the fiber/wire infrastructure could offer flexible and dynamic reconfiguration of the network. In this paper we present the design of an optical wireless communication orbital angular momentum (OAM) system which could provide faster communication rate. The proposed receiver is described in detail and a numerical example is given.
{"title":"Receiver design for OWC orbital angular momentum communication in data center applications","authors":"J. Kupferman, S. Arnon","doi":"10.1109/CSNDSP.2016.7573928","DOIUrl":"https://doi.org/10.1109/CSNDSP.2016.7573928","url":null,"abstract":"A data center (DC) is one of the main building blocks of the internet. Any intra DC network should strive to achieve high throughput, while continuing to be flexible in responding to changing traffic patterns. Optical wireless communication links on top of the fiber/wire infrastructure could offer flexible and dynamic reconfiguration of the network. In this paper we present the design of an optical wireless communication orbital angular momentum (OAM) system which could provide faster communication rate. The proposed receiver is described in detail and a numerical example is given.","PeriodicalId":298711,"journal":{"name":"2016 10th International Symposium on Communication Systems, Networks and Digital Signal Processing (CSNDSP)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127648000","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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