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2015 23rd International Conference on Software, Telecommunications and Computer Networks (SoftCOM)最新文献

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Electric models for calculation of crosstalk: Analysis & performance evaluation 计算相声的电气模型:分析与性能评价
2015 23rd International Conference on Software, Telecommunications and Computer Networks (SoftCOM) Pub Date : 2015-11-02 DOI: 10.1109/SOFTCOM.2015.7314087
M. Kachout, J. B. Tahar, F. Choubani
{"title":"Electric models for calculation of crosstalk: Analysis & performance evaluation","authors":"M. Kachout, J. B. Tahar, F. Choubani","doi":"10.1109/SOFTCOM.2015.7314087","DOIUrl":"https://doi.org/10.1109/SOFTCOM.2015.7314087","url":null,"abstract":"In this paper, three electric equivalent models to evaluate crosstalk between three-conductor transmission lines are proposed. First, electric equivalent models for three-conductor transmission lines are presented. Secondly, rigorous equations to calculate the per-unit length inductive and capacitive parameters are developed. These models allow us to calculate crosstalk between conductors. Finally, to validate the presented models, we compare the theoretical results with simulation data. Obtained results show that proposed models can be used to predict crosstalk performance.","PeriodicalId":264787,"journal":{"name":"2015 23rd International Conference on Software, Telecommunications and Computer Networks (SoftCOM)","volume":"122 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114523029","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}
引用次数: 0
Asymptotic analysis of Schoute's estimate for dynamic frame Aloha 动态框架Aloha的Schoute估计的渐近分析
2015 23rd International Conference on Software, Telecommunications and Computer Networks (SoftCOM) Pub Date : 2015-11-02 DOI: 10.1109/SOFTCOM.2015.7314073
L. Barletta, F. Borgonovo, I. Filippini
{"title":"Asymptotic analysis of Schoute's estimate for dynamic frame Aloha","authors":"L. Barletta, F. Borgonovo, I. Filippini","doi":"10.1109/SOFTCOM.2015.7314073","DOIUrl":"https://doi.org/10.1109/SOFTCOM.2015.7314073","url":null,"abstract":"This paper represents a further attempt to provide definite results about the asymptotic performance of protocols of the dynamic frame Aloha (DFA) family for radio frequency identification (RFID) systems. Here we deal with a simple and popular backlog estimate known as Schoute's estimate, apt to the DFA version that do not make use of the Frame Restart capability. This estimate performs very well in multiple access systems, but presents some efficiency impairment in RFID. Recent studies have shown that, with a perfect backlog estimate, the asymptotic efficiency of DFA, with or without Frame Restart, equals e-1. Here we prove that the asymptotic efficiency of Schoute's backlog estimate is 0.311 for any finite initial frame length. The analysis shows that the impairment is due to the slow convergence of the estimate to the true value, and opens the path to future work.","PeriodicalId":264787,"journal":{"name":"2015 23rd International Conference on Software, Telecommunications and Computer Networks (SoftCOM)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131527875","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}
引用次数: 4
QoS Evaluation for different WLAN standards 针对不同WLAN标准的QoS评估
2015 23rd International Conference on Software, Telecommunications and Computer Networks (SoftCOM) Pub Date : 2015-11-02 DOI: 10.1109/SOFTCOM.2015.7314115
Dardan Maraj, Ruzhdi Sefa, A. Maraj
{"title":"QoS Evaluation for different WLAN standards","authors":"Dardan Maraj, Ruzhdi Sefa, A. Maraj","doi":"10.1109/SOFTCOM.2015.7314115","DOIUrl":"https://doi.org/10.1109/SOFTCOM.2015.7314115","url":null,"abstract":"Quality of Service (QoS) refers to the possibility of networks to offer different services. Because nowadays we have an evolution of wireless customer's requests, it is needed to pay attention to QoS in WLAN (Wireless Local Area Network) standards. Thus, in this paper, we have analyzed the QoS of WLAN standards 802.11g and 802.11n, since they are most commonly standards used today. In order to evaluate the QoS, we need to consider some parameters that affect directly QoS. In this paper, we have considered data dropped because of buffer overflow, media access delays, retransmission attempts as well as traffic received by end station. The quality of these standards is measured setting up 4 different scenarios under the same OPNET (Riverbed) project. Through these scenarios we came up to the right conclusions about the performance of these standards for different traffic load conditions.","PeriodicalId":264787,"journal":{"name":"2015 23rd International Conference on Software, Telecommunications and Computer Networks (SoftCOM)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128118535","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}
引用次数: 7
PN code acquisition technique with an adaptive dwell time in DS-SS system DS-SS系统中自适应驻留时间伪码采集技术
2015 23rd International Conference on Software, Telecommunications and Computer Networks (SoftCOM) Pub Date : 2015-11-02 DOI: 10.1109/SOFTCOM.2015.7314113
Hyobeen Park, Seongjoo Lee
{"title":"PN code acquisition technique with an adaptive dwell time in DS-SS system","authors":"Hyobeen Park, Seongjoo Lee","doi":"10.1109/SOFTCOM.2015.7314113","DOIUrl":"https://doi.org/10.1109/SOFTCOM.2015.7314113","url":null,"abstract":"This paper proposes an algorithm that improves the mean code acquisition time using an energy estimation mode (EEM) and dwell time values from direct-sequence spread spectrum (DS-SS) System. Until recently, DS-SS System has been used in many areas from Wireless LAN, cellular phone, and GPS to telecommunication. Meanwhile, the development of reducing of pseudonoise (PN) code acquisition time, the core technique of DS-SS system, is continuously explored. The algorithm in this paper added the EEM before a search mode (SM) from the conventional PN code acquisition system, which is composed of a SM and a verification mode (VM). In the EEM, dwell time and threshold values are determined for use in the SM and the VM depending on the correlation energy. This paper applies the proposed technique under Rayleigh-fading channel in performing a simulation of PN code acquisition time by a mathematical modeling to evaluate the proposed algorithm. Numerical results show that the proposed method improves the detection performance and the rejection performance of false code phases not only in the VM but also in the SM. Furthermore, the proposed algorithm reduces the mean code acquisition time by maximum 29% than the conventional algorithm.","PeriodicalId":264787,"journal":{"name":"2015 23rd International Conference on Software, Telecommunications and Computer Networks (SoftCOM)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130786143","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}
引用次数: 1
Energy-fair routing in multi-domain green networks 多域绿色网络中的能量公平路由
2015 23rd International Conference on Software, Telecommunications and Computer Networks (SoftCOM) Pub Date : 2015-11-02 DOI: 10.1109/SOFTCOM.2015.7314090
N. Akin, Didem Gözüpek
{"title":"Energy-fair routing in multi-domain green networks","authors":"N. Akin, Didem Gözüpek","doi":"10.1109/SOFTCOM.2015.7314090","DOIUrl":"https://doi.org/10.1109/SOFTCOM.2015.7314090","url":null,"abstract":"Providing energy-fairness in multi-domain green networks is a vital but hitherto unexplored issue. In this paper, we address energy-fair routing in multi-domain green networks by formulating an optimization problem as an integer linear program. Our problem maximizes the energy saving of the domain with minimum energy saving while ensuring that the energy consumption of each domain is below a given threshold. We design an efficient heuristic algorithm called Balanced Multi-Domain Green Routing (BMDGR) for this problem. We evaluate the performance of BMDGR by comparison to the results obtained from our integer linear program using optimization software CPLEX. The simulation results show that BMDGR yields close results to the values obtained from CPLEX in terms of energy efficiency while having low computational complexity.","PeriodicalId":264787,"journal":{"name":"2015 23rd International Conference on Software, Telecommunications and Computer Networks (SoftCOM)","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126988443","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}
引用次数: 0
Analysis of multiple-folded spherical helical antenna using the Galerkin-Bubnov scheme of the Boundary Element method 用Galerkin-Bubnov格式的边界元法分析多折叠球面螺旋天线
2015 23rd International Conference on Software, Telecommunications and Computer Networks (SoftCOM) Pub Date : 2015-09-28 DOI: 10.1109/SOFTCOM.2015.7314067
A. Šušnjara, V. Doric, D. Poljak, Maja Skiljo, Z. Blažević
{"title":"Analysis of multiple-folded spherical helical antenna using the Galerkin-Bubnov scheme of the Boundary Element method","authors":"A. Šušnjara, V. Doric, D. Poljak, Maja Skiljo, Z. Blažević","doi":"10.1109/SOFTCOM.2015.7314067","DOIUrl":"https://doi.org/10.1109/SOFTCOM.2015.7314067","url":null,"abstract":"This paper deals with the numerical modeling of electrically short antenna designed as multiple-folded spherical helical antenna (SHA). Such antennas have convenient properties which make them suitable for use in systems such as wireless power transfer. The geometry of SHA is rather complex due to its high level curvature. The problem is formulated in terms of the set of Pocklington integro-differential equations for curved wires which is solved via the Galerkin-Bubnov scheme of the Boundary Element method (GB-IBEM). Some computational examples are given in the paper. The obtained numerical results are compared to some of the results obtained from available commercial software. The agreement is found to be satisfactory.","PeriodicalId":264787,"journal":{"name":"2015 23rd International Conference on Software, Telecommunications and Computer Networks (SoftCOM)","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133305891","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}
引用次数: 0
Constant Modulus Algorithm based on fourth order moments initialization 基于四阶矩初始化的常模算法
2015 23rd International Conference on Software, Telecommunications and Computer Networks (SoftCOM) Pub Date : 2015-09-01 DOI: 10.1109/SOFTCOM.2015.7314079
Rabah Maoudj, M. Terré, Iness Ahriz
{"title":"Constant Modulus Algorithm based on fourth order moments initialization","authors":"Rabah Maoudj, M. Terré, Iness Ahriz","doi":"10.1109/SOFTCOM.2015.7314079","DOIUrl":"https://doi.org/10.1109/SOFTCOM.2015.7314079","url":null,"abstract":"In this paper we introduce an adapted Constant Modulus Algorithm in order to identify the impulse response of an unknown propagation channel. This algorithm deals with the output of a fourth order moment estimation algorithm of received samples. This paper can be viewed as a follow up of a previous work devoted on blind channel estimation. It will be shown how results obtained in this previous work can be used as an initialization of the proposed adapted CMA, leading to a subsequent performances improvement.","PeriodicalId":264787,"journal":{"name":"2015 23rd International Conference on Software, Telecommunications and Computer Networks (SoftCOM)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130113487","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}
引用次数: 1
Design of a multi-channel and reconfigurable RF sampling GNSS receiver 一种多通道可重构射频采样GNSS接收机的设计
2015 23rd International Conference on Software, Telecommunications and Computer Networks (SoftCOM) Pub Date : 2015-09-01 DOI: 10.1109/SOFTCOM.2015.7314083
R. Barrak, Jihen Thabet, A. Ghazel
{"title":"Design of a multi-channel and reconfigurable RF sampling GNSS receiver","authors":"R. Barrak, Jihen Thabet, A. Ghazel","doi":"10.1109/SOFTCOM.2015.7314083","DOIUrl":"https://doi.org/10.1109/SOFTCOM.2015.7314083","url":null,"abstract":"This paper describes the design of a multi-channel, multi-frequency and reconfigurable GNSS receiver based on RF sampling technique. The design of the receiver RF front-end consists on the determination of the required gain, noise figure and analog to digital converter (ADC) dynamic range and sampling frequency based on GNSS standards specifications. Then, the analysis of noise sources in RF sampling receiver allows specifying the ADC jitter and quantization noise limits. The proposed design methodology is applied to design GPS/GLONASS/GALILEO/COMPASS receiver. Sampling frequency selection is addressed for different scenarios and anti-aliasing filter specifications are derived. Then, appropriate discrete components are selected for the purpose of the construction of a hardware test platform. Refined modeling and advanced simulation of the proposed GNSS receiver on ADS software validate the design method and show the performances of the proposed GNSS receiver.","PeriodicalId":264787,"journal":{"name":"2015 23rd International Conference on Software, Telecommunications and Computer Networks (SoftCOM)","volume":"71 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128013443","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}
引用次数: 9
Low-rate LDPC convolutional codes with short constraint length 具有短约束长度的低速率LDPC卷积码
2015 23rd International Conference on Software, Telecommunications and Computer Networks (SoftCOM) Pub Date : 2015-09-01 DOI: 10.1109/SOFTCOM.2015.7314104
M. Baldi, G. Cancellieri
{"title":"Low-rate LDPC convolutional codes with short constraint length","authors":"M. Baldi, G. Cancellieri","doi":"10.1109/SOFTCOM.2015.7314104","DOIUrl":"https://doi.org/10.1109/SOFTCOM.2015.7314104","url":null,"abstract":"We study a family of LDPC convolutional codes having code rate of the type 1/a, and analyze their minimum distance and local cycles length properties. We consider some low weight codewords that are known from the literature, and are easily obtained from the symbolic parity-check matrix of these codes. Starting from the structure of such codewords, we follow a twofold approach: i) we exploit graph-based techniques to design these codes with the aim to maximize their minimum distance while keeping the syndrome former constraint length as small as possible and ii) we provide a simple form for their generator matrices that allows to perform exhaustive searches through which we verify that the code design actually reaches its target. We also estimate the normalized minimum distance multiplicity for the codes we consider, and introduce the notion of symbolic graphs as a new tool to study the code properties.","PeriodicalId":264787,"journal":{"name":"2015 23rd International Conference on Software, Telecommunications and Computer Networks (SoftCOM)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122475530","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}
引用次数: 6
Ultra-wideband parabolic bicone antenna for ground penetrating radar 探地雷达用超宽带抛物面双锥天线
2015 23rd International Conference on Software, Telecommunications and Computer Networks (SoftCOM) Pub Date : 2015-09-01 DOI: 10.1109/SOFTCOM.2015.7314128
Maja Skiljo, Z. Blažević, D. Poljak
{"title":"Ultra-wideband parabolic bicone antenna for ground penetrating radar","authors":"Maja Skiljo, Z. Blažević, D. Poljak","doi":"10.1109/SOFTCOM.2015.7314128","DOIUrl":"https://doi.org/10.1109/SOFTCOM.2015.7314128","url":null,"abstract":"Antenna design for ground penetrating radar (GPR) is very complex and depends on specific application. In typical civil engineering GPR applications, the antennas need to be low cost, small size, compact and simple while operating in close vicinity to real ground and in wide frequency band. In this paper we propose an ultra-wideband parabolic bicone antenna. Except for its compactness and small size, the bicone antenna design parameters and the given procedure can be used for a specific GPR application. The proposed antenna achieves VSWR > 2 in ultra-wideband from 0.67 - 4.3 GHz with the total height of 11.8 cm. Time domain response of the proposed antenna shows a negligible excitation signal distortion in the direction of maximum radiation. Also, very good VSWR is obtained when the antenna is very close to the typical real ground found in civil engineering GPR applications.","PeriodicalId":264787,"journal":{"name":"2015 23rd International Conference on Software, Telecommunications and Computer Networks (SoftCOM)","volume":"149 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122454053","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}
引用次数: 2
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