Pub Date : 2016-07-20DOI: 10.1109/CSNDSP.2016.7573912
P. Chvojka, P. Dvořák, P. Pesek, S. Zvánovec, P. Haigh, Zabih Ghassemlooy
This paper presents experimental results on a visible light communications system utilizing organic light-emitting diodes (OLEDs) and 16-quadrature amplitude modulation. The modulation bandwidth of the OLED device is limited to 310 kHz and the signal is generated on carrier frequencies fc = {100, 200, 300} kHz for use across different regions of the OLED frequency response. We demonstrate how setting a specific carrier frequency can affect the system performance. The supported bit rates are 220, 640 and 260 kb/s for fc = 100, 200 and 300 kHz, respectively. The angular dependence of the system performance is also analysed.
{"title":"Characterization of the organic LED based visible light communications","authors":"P. Chvojka, P. Dvořák, P. Pesek, S. Zvánovec, P. Haigh, Zabih Ghassemlooy","doi":"10.1109/CSNDSP.2016.7573912","DOIUrl":"https://doi.org/10.1109/CSNDSP.2016.7573912","url":null,"abstract":"This paper presents experimental results on a visible light communications system utilizing organic light-emitting diodes (OLEDs) and 16-quadrature amplitude modulation. The modulation bandwidth of the OLED device is limited to 310 kHz and the signal is generated on carrier frequencies fc = {100, 200, 300} kHz for use across different regions of the OLED frequency response. We demonstrate how setting a specific carrier frequency can affect the system performance. The supported bit rates are 220, 640 and 260 kb/s for fc = 100, 200 and 300 kHz, respectively. The angular dependence of the system performance is also analysed.","PeriodicalId":298711,"journal":{"name":"2016 10th International Symposium on Communication Systems, Networks and Digital Signal Processing (CSNDSP)","volume":"67 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":"114681555","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.2016.7574036
M. Najafi, G. Baghersalimi, Mohammad Reza Alizadeh, Mohamad Rahimi, A. Burton
In this paper the impact of a Radio-over-Fiber (RoF) optical subsystem on the sensitivity to the phase noise of Orthogonal Frequency Division Multiplexing (OFDM) in a multiple-input multiple-output (MIMO) system is evaluated and a method for reducing the effect of this phase noise is presented using computer simulation. The study investigates the effect of phase noise on the system Bit Error Rate (BER) for different Output-Back-Off levels in the presence of optical subsystem's nonlinearity in an AWGN channel. Hence, a way to reduce its effect is presented by estimating this phase offset that it is called synchronization of phase noise.
{"title":"Synchronization of a MIMO-OFDM based radio-over-fiber communication system in the presence of phase noise","authors":"M. Najafi, G. Baghersalimi, Mohammad Reza Alizadeh, Mohamad Rahimi, A. Burton","doi":"10.1109/CSNDSP.2016.7574036","DOIUrl":"https://doi.org/10.1109/CSNDSP.2016.7574036","url":null,"abstract":"In this paper the impact of a Radio-over-Fiber (RoF) optical subsystem on the sensitivity to the phase noise of Orthogonal Frequency Division Multiplexing (OFDM) in a multiple-input multiple-output (MIMO) system is evaluated and a method for reducing the effect of this phase noise is presented using computer simulation. The study investigates the effect of phase noise on the system Bit Error Rate (BER) for different Output-Back-Off levels in the presence of optical subsystem's nonlinearity in an AWGN channel. Hence, a way to reduce its effect is presented by estimating this phase offset that it is called synchronization of phase noise.","PeriodicalId":298711,"journal":{"name":"2016 10th International Symposium on Communication Systems, Networks and Digital Signal Processing (CSNDSP)","volume":"16 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":"126860368","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.2016.7573942
Andi Soekartono, Yu Chen, I. Darwazeh
We study two cross layer simulation models with different LTE MAC scheduler types in this paper: a discrete time simulation model and a discrete event simulation model. Results show that under similar settings, these two simulation models produce similar results in a single user scenario but perform differently in a multi-UE scenario. Moreover, the proportional fair scheduling is shown to be the fairest one using both simulation models.
{"title":"PHY-MAC cross layer based modelling for LTE QoS optimization","authors":"Andi Soekartono, Yu Chen, I. Darwazeh","doi":"10.1109/CSNDSP.2016.7573942","DOIUrl":"https://doi.org/10.1109/CSNDSP.2016.7573942","url":null,"abstract":"We study two cross layer simulation models with different LTE MAC scheduler types in this paper: a discrete time simulation model and a discrete event simulation model. Results show that under similar settings, these two simulation models produce similar results in a single user scenario but perform differently in a multi-UE scenario. Moreover, the proportional fair scheduling is shown to be the fairest one using both simulation models.","PeriodicalId":298711,"journal":{"name":"2016 10th International Symposium on Communication Systems, Networks and Digital Signal Processing (CSNDSP)","volume":"6 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":"129215630","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.2016.7574026
Aydin Kizilkaya, M. D. Elbi, Ali Kirkbas
The empirical mode decomposition (EMD) is a popular tool that is valid for nonlinear and nonstationary signal analysis. Applying this tool to any given signal reveals a finite set of oscillatory modes termed intrinsic mode functions (IMFs) and a residual. The sum of all extracted IMFs and the residual reconstructs the original signal without any information loss. Although the EMD satisfies the perfect reconstruction property, it is not based on any optimality criterion. This is an important issue especially in using the EMD for reconstructing the original signal from its noisy versions. At this point, a more flexible form of the EMD is required. Related to this issue, recently, only a few formulations are developed. In addition to these ones, in this paper, a new signal reconstruction algorithm termed time-varying weighted EMD is proposed. This algorithm is optimal in the least-squares error sense and tries to reconstruct the original signal by the sum of time-varying weighted IMFs and residual signal. It is demonstrated by simulations that the proposed algorithm introduces superior performance than that of the existing ones in reconstructing the desired signal after denoising.
{"title":"Least-squares error based optimal signal reconstruction using time-varying weighted empirical mode decomposition","authors":"Aydin Kizilkaya, M. D. Elbi, Ali Kirkbas","doi":"10.1109/CSNDSP.2016.7574026","DOIUrl":"https://doi.org/10.1109/CSNDSP.2016.7574026","url":null,"abstract":"The empirical mode decomposition (EMD) is a popular tool that is valid for nonlinear and nonstationary signal analysis. Applying this tool to any given signal reveals a finite set of oscillatory modes termed intrinsic mode functions (IMFs) and a residual. The sum of all extracted IMFs and the residual reconstructs the original signal without any information loss. Although the EMD satisfies the perfect reconstruction property, it is not based on any optimality criterion. This is an important issue especially in using the EMD for reconstructing the original signal from its noisy versions. At this point, a more flexible form of the EMD is required. Related to this issue, recently, only a few formulations are developed. In addition to these ones, in this paper, a new signal reconstruction algorithm termed time-varying weighted EMD is proposed. This algorithm is optimal in the least-squares error sense and tries to reconstruct the original signal by the sum of time-varying weighted IMFs and residual signal. It is demonstrated by simulations that the proposed algorithm introduces superior performance than that of the existing ones in reconstructing the desired signal after denoising.","PeriodicalId":298711,"journal":{"name":"2016 10th International Symposium on Communication Systems, Networks and Digital Signal Processing (CSNDSP)","volume":"7 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":"134491935","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.2016.7574011
S. Rakshit, M. Hempel, H. Sharif
Advances in Wireless Sensor Networks (WSN) have enabled new technologies to offer enriched reliability, seamless mobility, safety, and security in surface transportation. In rail transportation, WSNs play an important role in real-time monitoring of freight railcars to prevent major failures and derailments. However, the wireless communications among a large number of sensors onboard of a train present unique challenges due to the linear rail network topology, wireless signal interference from locomotives and railcars, and limited power sources available on freight railcars. In this presentation, we discuss a unique two-layer WSN architecture suitable for freight railroads.
{"title":"Wireless sensor networks in surface transportation","authors":"S. Rakshit, M. Hempel, H. Sharif","doi":"10.1109/CSNDSP.2016.7574011","DOIUrl":"https://doi.org/10.1109/CSNDSP.2016.7574011","url":null,"abstract":"Advances in Wireless Sensor Networks (WSN) have enabled new technologies to offer enriched reliability, seamless mobility, safety, and security in surface transportation. In rail transportation, WSNs play an important role in real-time monitoring of freight railcars to prevent major failures and derailments. However, the wireless communications among a large number of sensors onboard of a train present unique challenges due to the linear rail network topology, wireless signal interference from locomotives and railcars, and limited power sources available on freight railcars. In this presentation, we discuss a unique two-layer WSN architecture suitable for freight railroads.","PeriodicalId":298711,"journal":{"name":"2016 10th International Symposium on Communication Systems, Networks and Digital Signal Processing (CSNDSP)","volume":"28 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":"114172135","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.2016.7573910
I. Moscholios, V. Vassilakis, M. Logothetis
In this paper, we study the performance of the Multiple Fractional Channel Reservation (MFCR) policy, which is a bandwidth reservation policy that allows the reservation of real (not integer) number of channels in order to favor calls of high channel (bandwidth) requirements. We consider a link of fixed capacity that accommodates Poisson arriving calls of different service-classes with different bandwidth-per-call requirements. Calls compete for the available bandwidth under the MFCR policy. To determine call blocking probabilities, we propose approximate but recursive formulas based on the notion of reserve transition rates. The accuracy of the proposed method is verified through simulation.
{"title":"Call blocking probabilities for poisson traffic under the multiple fractional channel reservation policy","authors":"I. Moscholios, V. Vassilakis, M. Logothetis","doi":"10.1109/CSNDSP.2016.7573910","DOIUrl":"https://doi.org/10.1109/CSNDSP.2016.7573910","url":null,"abstract":"In this paper, we study the performance of the Multiple Fractional Channel Reservation (MFCR) policy, which is a bandwidth reservation policy that allows the reservation of real (not integer) number of channels in order to favor calls of high channel (bandwidth) requirements. We consider a link of fixed capacity that accommodates Poisson arriving calls of different service-classes with different bandwidth-per-call requirements. Calls compete for the available bandwidth under the MFCR policy. To determine call blocking probabilities, we propose approximate but recursive formulas based on the notion of reserve transition rates. The accuracy of the proposed method is verified through simulation.","PeriodicalId":298711,"journal":{"name":"2016 10th International Symposium on Communication Systems, Networks and Digital Signal Processing (CSNDSP)","volume":"70 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":"129677517","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.2016.7574041
A. Kaliszan, P. Zwierzykowski
This article proposes an application of a mini-malistic Real Time Operating System (RTOS) for a construction of a device that works in the Internet of Things. The solution described in the article is an effective and feasible alternative to minicomputers with the Linux and Python language interpreter. The application of RTOS reduces significantly the required hardware resources, which results in a decrease of the cost of the device and an increase in its energy saving efficiency and reliability. The paper presents the design of an access server that makes remote operation of 16 serial ports possible and that controls 16 power lines via the Ethernet. The device has been developed on the basis of an 8-bit micro-controller equipped with 64 kB of external memory for data and simple power-saving ethernet driver without dedicated processor. Thanks to the application of the operating system the software is composed of a number of tasks running in parallel and being in close communication with one another. With the approach that is compatible with the philosophy of the Internet of Things, there is no need to implement an advanced management panel on the device. This functionality can be implemented in the cloud - on a virtual server.
{"title":"Application of Real Time Operating System in the Internet of Things","authors":"A. Kaliszan, P. Zwierzykowski","doi":"10.1109/CSNDSP.2016.7574041","DOIUrl":"https://doi.org/10.1109/CSNDSP.2016.7574041","url":null,"abstract":"This article proposes an application of a mini-malistic Real Time Operating System (RTOS) for a construction of a device that works in the Internet of Things. The solution described in the article is an effective and feasible alternative to minicomputers with the Linux and Python language interpreter. The application of RTOS reduces significantly the required hardware resources, which results in a decrease of the cost of the device and an increase in its energy saving efficiency and reliability. The paper presents the design of an access server that makes remote operation of 16 serial ports possible and that controls 16 power lines via the Ethernet. The device has been developed on the basis of an 8-bit micro-controller equipped with 64 kB of external memory for data and simple power-saving ethernet driver without dedicated processor. Thanks to the application of the operating system the software is composed of a number of tasks running in parallel and being in close communication with one another. With the approach that is compatible with the philosophy of the Internet of Things, there is no need to implement an advanced management panel on the device. This functionality can be implemented in the cloud - on a virtual server.","PeriodicalId":298711,"journal":{"name":"2016 10th International Symposium on Communication Systems, Networks and Digital Signal Processing (CSNDSP)","volume":"12 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":"124013090","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.2016.7573974
R. Martínek, R. Kahankova, H. Skutová, P. Koudelka, J. Zidek, J. Koziorek
The extraction of the Fetal Electrocardiogram (fECG) from the composite Electrocardiogram (ECG) signal obtained from the abdominal lead is discussed. The main point of this paper is to introduce some of the most used Least Mean Squares (LMS) based Finite Impulse Response (FIR) Adaptive Filters and to determine which of them are the most effective under varying circumstances. Experimental results suggest the ideal combination of the chosen settings for these functions. Results of fECG extraction are assessed by Percentage Root-Mean-Square Difference (PRD), input and output Signal to Noise Ratios (SNRs), and Root Mean Square Error (RMSE). Based on simulations conclusions, optimal convergence constant value and filter order were empirically determined. Setting the optimal value of the convergence constant and filter order of adaptive algorithm can be considered a contribution to original results. These results can be used on real records fECG, where it is difficult to determine because of the missing reference.
{"title":"Adaptive signal processing techniques for extracting abdominal fetal electrocardiogram","authors":"R. Martínek, R. Kahankova, H. Skutová, P. Koudelka, J. Zidek, J. Koziorek","doi":"10.1109/CSNDSP.2016.7573974","DOIUrl":"https://doi.org/10.1109/CSNDSP.2016.7573974","url":null,"abstract":"The extraction of the Fetal Electrocardiogram (fECG) from the composite Electrocardiogram (ECG) signal obtained from the abdominal lead is discussed. The main point of this paper is to introduce some of the most used Least Mean Squares (LMS) based Finite Impulse Response (FIR) Adaptive Filters and to determine which of them are the most effective under varying circumstances. Experimental results suggest the ideal combination of the chosen settings for these functions. Results of fECG extraction are assessed by Percentage Root-Mean-Square Difference (PRD), input and output Signal to Noise Ratios (SNRs), and Root Mean Square Error (RMSE). Based on simulations conclusions, optimal convergence constant value and filter order were empirically determined. Setting the optimal value of the convergence constant and filter order of adaptive algorithm can be considered a contribution to original results. These results can be used on real records fECG, where it is difficult to determine because of the missing reference.","PeriodicalId":298711,"journal":{"name":"2016 10th International Symposium on Communication Systems, Networks and Digital Signal Processing (CSNDSP)","volume":"121 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":"134588571","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.2016.7574030
F. Sheikhshoaei, M. Asadi, S. Sadeghi, A. Mahani
Energy efficient routing algorithm is an important issue in WSNs applications. In this paper we propose an ant colony algorithm based on smell factor, SUMACO, for delay-constraint multicast routing applications. Simulation results verify the speed of proposed algorithm to find the final tree of multicast routing. In Comparison with the conventional ant colony algorithm, the convergence speed and also the cost of SUMACO is strongly improved.
{"title":"Low cost ACA-based multicast routing for multi-media applications","authors":"F. Sheikhshoaei, M. Asadi, S. Sadeghi, A. Mahani","doi":"10.1109/CSNDSP.2016.7574030","DOIUrl":"https://doi.org/10.1109/CSNDSP.2016.7574030","url":null,"abstract":"Energy efficient routing algorithm is an important issue in WSNs applications. In this paper we propose an ant colony algorithm based on smell factor, SUMACO, for delay-constraint multicast routing applications. Simulation results verify the speed of proposed algorithm to find the final tree of multicast routing. In Comparison with the conventional ant colony algorithm, the convergence speed and also the cost of SUMACO is strongly improved.","PeriodicalId":298711,"journal":{"name":"2016 10th International Symposium on Communication Systems, Networks and Digital Signal Processing (CSNDSP)","volume":"50 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":"131823445","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.2016.7573927
Kai-Daniel Buchter
Large-scale airborne communication networks are modeled, using a simulation of global, wide-body aircraft movements and assuming the use of optical communication links. Statistics concerning the expected node degree as function of communication range and ratios of connected aircraft are presented. It is found that, with an ambitious but plausible communication range of 450 km, on average 80% of world-wide, oceanic flights may connect to ground gateways via airborne networking in the simulation.
{"title":"Availability of airborne Ad-hoc communication network in global air traffic simulation","authors":"Kai-Daniel Buchter","doi":"10.1109/CSNDSP.2016.7573927","DOIUrl":"https://doi.org/10.1109/CSNDSP.2016.7573927","url":null,"abstract":"Large-scale airborne communication networks are modeled, using a simulation of global, wide-body aircraft movements and assuming the use of optical communication links. Statistics concerning the expected node degree as function of communication range and ratios of connected aircraft are presented. It is found that, with an ambitious but plausible communication range of 450 km, on average 80% of world-wide, oceanic flights may connect to ground gateways via airborne networking in the simulation.","PeriodicalId":298711,"journal":{"name":"2016 10th International Symposium on Communication Systems, Networks and Digital Signal Processing (CSNDSP)","volume":"15 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":"133477911","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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