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2006 International Telecommunications Symposium最新文献

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Novel 3D orthogonal basis functions for the vector wave equation solution 求解矢量波动方程的新型三维正交基函数
2006 International Telecommunications Symposium Pub Date : 2006-09-01 DOI: 10.1109/ITS.2006.4433287
M. S. Gonçalves, H. Hernández-Figueroa, A. Bordonalli
{"title":"Novel 3D orthogonal basis functions for the vector wave equation solution","authors":"M. S. Gonçalves, H. Hernández-Figueroa, A. Bordonalli","doi":"10.1109/ITS.2006.4433287","DOIUrl":"https://doi.org/10.1109/ITS.2006.4433287","url":null,"abstract":"New three-dimension orthogonal basis functions for finite element solution of the vectorial wave equation are presented. These functions, based on the Whitney edge elements, maintain the same characteristics as those of conventional basis functions with the advantage of naturally generating diagonal matrices during calculation. This approach completely eliminates the necessity of solving a linear system of equations at each time step, as it is required by conventional numerical methods.","PeriodicalId":271294,"journal":{"name":"2006 International Telecommunications Symposium","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121807004","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
Measured distribution of the duration of fades at 1.8 GHz 衰减持续时间的测量分布在1.8 GHz
2006 International Telecommunications Symposium Pub Date : 2006-09-01 DOI: 10.1109/ITS.2006.4433334
A.M.O. Ribeiro, C. Castelli, E. Conforti
{"title":"Measured distribution of the duration of fades at 1.8 GHz","authors":"A.M.O. Ribeiro, C. Castelli, E. Conforti","doi":"10.1109/ITS.2006.4433334","DOIUrl":"https://doi.org/10.1109/ITS.2006.4433334","url":null,"abstract":"Results of narrow-band field trials of fade durations are presented. The measurements are carried out in a suburban environment at 1.8 GHz. Empirical data are compared to Nakagami average fade duration and Rice distribution of the duration of fades. Also, a family of curves representing the number of fades per second exceeding a given fade duration is presented.","PeriodicalId":271294,"journal":{"name":"2006 International Telecommunications Symposium","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122177448","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
Surface plasmon polariton propagation in y-shaped metallic channels junctions 表面等离子激元极化子在y形金属通道结中的传播
2006 International Telecommunications Symposium Pub Date : 2006-09-01 DOI: 10.1109/ITS.2006.4433258
C. E. Rubio-Mercedes, V. Rodriguez‐Esquerre, A.M. Ferreira Frasson, H. Hernández-Figueroa
{"title":"Surface plasmon polariton propagation in y-shaped metallic channels junctions","authors":"C. E. Rubio-Mercedes, V. Rodriguez‐Esquerre, A.M. Ferreira Frasson, H. Hernández-Figueroa","doi":"10.1109/ITS.2006.4433258","DOIUrl":"https://doi.org/10.1109/ITS.2006.4433258","url":null,"abstract":"We have performed finite element method (FEM) analysis of surface plasmon polariton (SPPs) propagation and combination in Y-shaped metallic channels junctions. The analysis result shows that the behaviour of SPPs in metallic nano-size channels is similar of that of light propagation in conventional waveguide. The SPPs can also be combined in appropriately designed structures to enhance its propagation efficiency. Numerical simulation of one, three, seven and fifty Y's-shaped metallic channels junctions examples are performed taking into account loss associated with metal absorption.","PeriodicalId":271294,"journal":{"name":"2006 International Telecommunications Symposium","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124015977","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
Inverse scattering of an embedded inhomogeneous dielectric cylinders coated on a conductor 涂覆在导体上的嵌入式非均匀介质圆柱体的逆散射
2006 International Telecommunications Symposium Pub Date : 2006-09-01 DOI: 10.1109/ITS.2006.4433286
C. Lin, Chung-Hsin Huang, C. Chiu
{"title":"Inverse scattering of an embedded inhomogeneous dielectric cylinders coated on a conductor","authors":"C. Lin, Chung-Hsin Huang, C. Chiu","doi":"10.1109/ITS.2006.4433286","DOIUrl":"https://doi.org/10.1109/ITS.2006.4433286","url":null,"abstract":"In this paper, the inverse problem of an embedded inhomogeneous dielectric cylinders coated on a conductor by TM wave illumination is investigated. Inhomogeneous dielectric cylinders coated on a conductor embedded in a slab scatters a group of unrelated incident waves from outside. The scattered field is recorded outside the slab. By proper arrangement of the various unrelated incident field, the difficulties of ill-posedness and nonlinearity are circumvented, and the permittivity distribution can be reconstructed through simple matrix operations. The algorithm is based on the moment method and the unrelated illumination method. Numerical results are given to demonstrate the capability of the inverse algorithm. They also show that the permittivity distribution of the cylinders can be successfully reconstructed even when the permittivity is fairly large. Good reconstructed is obtained even in the presence of additive Gaussian noise in measured data. In addition, the effect of noise on the reconstruction result is also investigated.","PeriodicalId":271294,"journal":{"name":"2006 International Telecommunications Symposium","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125652745","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
A management and configuration infrastructure for RNP’s digital video distribution service RNP数字视频分发服务的管理和配置基础设施
2006 International Telecommunications Symposium Pub Date : 2006-09-01 DOI: 10.1109/ITS.2006.4433307
F.L. de Almeida, G. D. da Silveira, G. L. de Souza Filho, G. Bressan
{"title":"A management and configuration infrastructure for RNP’s digital video distribution service","authors":"F.L. de Almeida, G. D. da Silveira, G. L. de Souza Filho, G. Bressan","doi":"10.1109/ITS.2006.4433307","DOIUrl":"https://doi.org/10.1109/ITS.2006.4433307","url":null,"abstract":"This paper proposes an infrastructure for configuring and managing a digital video distribution service. The service has been conceived for configure, management and video distribution over a digital video network composed of servers interconnected by an IP network. This infrastructure has been tested over the backbone of the Brazilian National Research Network (RNP). Also, the service was designed to distribute video in a way that is independent on the video format and to interact with different types of clients. The proposed infrastructure aims to make the configuration process simpler, faster, more intuitive and consistent, reducing the required effort to keep the digital video distribution service operational.","PeriodicalId":271294,"journal":{"name":"2006 International Telecommunications Symposium","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122733576","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
Queueing analysis for multifractal traffic through network calculus and global scaling parameter 基于网络演算和全局尺度参数的多重分形交通排队分析
2006 International Telecommunications Symposium Pub Date : 2006-09-01 DOI: 10.1109/ITS.2006.4433266
F. Vieira, Luan L. Lee
{"title":"Queueing analysis for multifractal traffic through network calculus and global scaling parameter","authors":"F. Vieira, Luan L. Lee","doi":"10.1109/ITS.2006.4433266","DOIUrl":"https://doi.org/10.1109/ITS.2006.4433266","url":null,"abstract":"In this article, we derive a global scaling parameter for network multifractal traffic. Through this parameter and by relating the effective bandwidth concept to the statistical network calculus, we propose performance bounds for highspeed networks. Our performance bound estimation approach is evaluated by simulations with Internet and Ethernet traffic traces, verifying its efficiency in capturing byte loss probability and mean buffer occupation. The proposed byte loss probability bound was shown to be tighter than that given by the large deviations theory.","PeriodicalId":271294,"journal":{"name":"2006 International Telecommunications Symposium","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121236934","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: 3
Performance evaluation of adaptive H8 space-time equalizers for wireless communication systems with asynchronous interference 异步干扰下无线通信系统自适应H8时空均衡器性能评价
2006 International Telecommunications Symposium Pub Date : 2006-09-01 DOI: 10.1109/ITS.2006.4433292
F. Chaves, A. D. de Almeida, J. Mota
{"title":"Performance evaluation of adaptive H8 space-time equalizers for wireless communication systems with asynchronous interference","authors":"F. Chaves, A. D. de Almeida, J. Mota","doi":"10.1109/ITS.2006.4433292","DOIUrl":"https://doi.org/10.1109/ITS.2006.4433292","url":null,"abstract":"Packet-switched multi-access communication systems may have difficulties on detecting a user signal due to a momentary interference, which is caused by packet transmissions of a co-channel interferer user. Asynchronous co-channel interference impacts directly the performance of the reception process, specially in the uplink (mobile to base station transmission). In this work, the Hinfin filter is configured as an adaptive space-time equalizer and its performance is compared to that of the RLS- based space-time equalizer, in the presence of asynchronous interference. Computational simulations are performed for single- input multiple-output (SIMO) channels with spatial diversity.","PeriodicalId":271294,"journal":{"name":"2006 International Telecommunications Symposium","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126942708","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
A fuzzy algorithm to solve the problem of QoS unicast routing in IP networks 解决IP网络中QoS单播路由问题的模糊算法
2006 International Telecommunications Symposium Pub Date : 2006-09-01 DOI: 10.1109/ITS.2006.4433391
R.A. Resende, A.C. Lavelha, A. Yamakami, I. S. Bonatti
{"title":"A fuzzy algorithm to solve the problem of QoS unicast routing in IP networks","authors":"R.A. Resende, A.C. Lavelha, A. Yamakami, I. S. Bonatti","doi":"10.1109/ITS.2006.4433391","DOIUrl":"https://doi.org/10.1109/ITS.2006.4433391","url":null,"abstract":"In this paper, a QoS unicast routing problem is solved by means of a generalized fuzzy-constrained model. Both imprecision of the IP network state information and the fuzziness of QoS constraints are taken into account invoking fuzzy set theory. We have developed an algorithm, which is based on the classic Ford-Moore-Bellman algorithm, whose outcome is a fuzzy set of non-dominated paths. Its effectiveness is verified by comparison with results of a known crisp model.","PeriodicalId":271294,"journal":{"name":"2006 International Telecommunications Symposium","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127840641","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: 3
Impact of spatial correlation on adaptive coded modulation performance in rayleigh fading 空间相关对瑞利衰落中自适应编码调制性能的影响
2006 International Telecommunications Symposium Pub Date : 2006-09-01 DOI: 10.1109/ITS.2006.4433392
B. Holter, G. Oien
{"title":"Impact of spatial correlation on adaptive coded modulation performance in rayleigh fading","authors":"B. Holter, G. Oien","doi":"10.1109/ITS.2006.4433392","DOIUrl":"https://doi.org/10.1109/ITS.2006.4433392","url":null,"abstract":"A performance analysis of an adaptive coded modulation (ACM) scheme operating on identically distributed and spatially correlated Rayleigh flat-fading channels is presented. In particular, a single-input multiple-output system using maximum ratio combining at the receiver is considered. The ACM scheme consists of a set of multidimensional trellis codes originally designed for additive white Gaussian noise channels, with codes being based on quadrature amplitude modulation signal constellations of varying size. Rate adaptation is achieved by providing the transmitter with channel state information as predicted by the receiver. Numerical examples are given for the case of Jakes correlation profile and maximum a posteriori-optimal predictor coefficients, and results are compared to previously published results for spatially uncorrelated channels.","PeriodicalId":271294,"journal":{"name":"2006 International Telecommunications Symposium","volume":"420 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133716886","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
Blind adaptive and iterative interference cancellation receiver structures based on the constant modulus criterion in multipath channels 基于恒模准则的多径信道盲自适应迭代干扰抵消接收机结构
2006 International Telecommunications Symposium Pub Date : 2006-09-01 DOI: 10.1049/iet-com:20070350
T. Vinhoza, R. D. Lamare, R. Neto
{"title":"Blind adaptive and iterative interference cancellation receiver structures based on the constant modulus criterion in multipath channels","authors":"T. Vinhoza, R. D. Lamare, R. Neto","doi":"10.1049/iet-com:20070350","DOIUrl":"https://doi.org/10.1049/iet-com:20070350","url":null,"abstract":"this work we propose blind adaptive and iterative interference cancellation (IC) receiver structures for direct sequence code division multiple access (DS-CDMA) systems in multipath channels. A code-constrained constant modulus (CCM) design criterion based on constrained optimization techniques and adaptive algorithms for receiver and channel parameter estimation are described for successive IC (SIC) and parallel IC (PIC) detectors and a new hybrid IC (HIC) scheme in scenarios subject to multipath fading. The proposed HIC structure combines the strengths of linear, SIC and PIC receivers and is shown to outperform the conventional linear, SIC and PIC structures. A novel iterative detection approach that generates different cancellation orders and selects the most likely symbol estimate on the basis of the instantaneous minimum constant modulus (CM) criterion is also proposed and combined with the new HIC structure to further enhance performance. Simulation results for an uplink scenario assess the algorithms, the proposed blind adaptive IC detectors against existing receivers and evaluate the effects of error propagation of the new cancellations techniques.","PeriodicalId":271294,"journal":{"name":"2006 International Telecommunications Symposium","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116688814","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
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