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ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202)最新文献

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A scalable Khoros neural network toolbox 一个可扩展的Khoros神经网络工具箱
ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202) Pub Date : 1998-08-09 DOI: 10.1109/ITS.1998.718476
Jeremy Worley, Ramiro Jordkn
{"title":"A scalable Khoros neural network toolbox","authors":"Jeremy Worley, Ramiro Jordkn","doi":"10.1109/ITS.1998.718476","DOIUrl":"https://doi.org/10.1109/ITS.1998.718476","url":null,"abstract":"Three problems limit neural network simulation environments. First, the computational complexity of neural network simulation imposes a practical constraint on the size of simulated neural networks. Second, neural network simulation environments are usually designed to accommodate a confined set of neural network models. Third, most neural network simulation environments do not facilitate interoperability with external systems. This project addresses these issues by implementing a simulation environment that scales to support larger neural systems, facilitates the implementation of new network architectures, and interoperates with other software. This problem was approached by examining a representative set of neural network architectures that feature a diversity of characteristics such as topology and learning rules. The result of this research was applied to the design and implementation of an environment consisting of tools and applications to support neural network simulation. This environment, developed under the Khoros system, provides a visual neural network construction tool, an extensible C++ class library that encapsulates network management and object interaction, a file format for storage and retrieval of neural networks, and finally, neural network visualization tools.","PeriodicalId":205350,"journal":{"name":"ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202)","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126215957","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
Implementing a distributed Web-based management system in Java 用Java实现一个分布式的基于web的管理系统
ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202) Pub Date : 1998-08-09 DOI: 10.1109/ITS.1998.718455
A. Ghlamallah, R. Boutaba
{"title":"Implementing a distributed Web-based management system in Java","authors":"A. Ghlamallah, R. Boutaba","doi":"10.1109/ITS.1998.718455","DOIUrl":"https://doi.org/10.1109/ITS.1998.718455","url":null,"abstract":"The distribution requirement of current and future networked environments has led to a shift from traditional centralized towards distributed management approaches. A distributed architecture for network management is presented The architecture implementation is based on an extensive use of emerging client/server, Web and Java technologies, the pursued objective being to promote flexibility, openness and portability.","PeriodicalId":205350,"journal":{"name":"ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114255958","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
A relation between the Renyi distance of order /spl alpha/ and the variational distance 阶/spl α /的Renyi距离与变分距离的关系
ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202) Pub Date : 1998-08-09 DOI: 10.1109/ITS.1998.713125
M.S. Alencar, F.M. Assis
{"title":"A relation between the Renyi distance of order /spl alpha/ and the variational distance","authors":"M.S. Alencar, F.M. Assis","doi":"10.1109/ITS.1998.713125","DOIUrl":"https://doi.org/10.1109/ITS.1998.713125","url":null,"abstract":"Inequalities involving the Renyi distance of order /spl alpha/, the Kullback-Leibler distance and the variational distance are presented. The inequalities are useful in situations where one needs a comparison between different distributions on the same alphabet or, for instance, in connection with problems on guessing and sequential decoding, or classification.","PeriodicalId":205350,"journal":{"name":"ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202)","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122158726","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
On the transmission of repeaterless 8/spl times/2.5 Gb/s over 160 km of dispersion-shifted fiber 在160公里的频散位移光纤中传输无中继8/spl次/2.5 Gb/s
ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202) Pub Date : 1998-08-09 DOI: 10.1109/ITS.1998.718466
J.T. De Jesus, H.B. De Moraes, A. Sachs, A. Paradisi, E. Pithon, A. Coral, M. Rodriguez, J. S. Pereira
{"title":"On the transmission of repeaterless 8/spl times/2.5 Gb/s over 160 km of dispersion-shifted fiber","authors":"J.T. De Jesus, H.B. De Moraes, A. Sachs, A. Paradisi, E. Pithon, A. Coral, M. Rodriguez, J. S. Pereira","doi":"10.1109/ITS.1998.718466","DOIUrl":"https://doi.org/10.1109/ITS.1998.718466","url":null,"abstract":"This paper reports on WDM transmission of 8 channels, 10 dBm per channel, over dispersion-shifted fiber. Experimental results show a penalty below 1 dB for all channels used. The results were obtained without extra optical components in the optical path or a special modulation scheme.","PeriodicalId":205350,"journal":{"name":"ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116927011","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
Parametric mixed linear programming with fuzzy numbers and an application to telecommunications networks planning 模糊数参数混合线性规划及其在电信网络规划中的应用
ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202) Pub Date : 1998-08-09 DOI: 10.1109/ITS.1998.713140
Carlos M. F. Carlson, H. Tavares, J. Formigoni
{"title":"Parametric mixed linear programming with fuzzy numbers and an application to telecommunications networks planning","authors":"Carlos M. F. Carlson, H. Tavares, J. Formigoni","doi":"10.1109/ITS.1998.713140","DOIUrl":"https://doi.org/10.1109/ITS.1998.713140","url":null,"abstract":"The network expansion required for telecommunication businesses to provide new services and technologies must be carefully planned. However, it is not always possible to utilize precise planning data and forecasting demands and costs can introduce uncertainties. Under these uncertain conditions, flexible and comprehensive planning tools that deal suitably with uncertainties are needed. This paper proposes a model for planning the evolution of telecommunications access networks. The model accepts imprecise demand values as fuzzy numbers and, using a parametric approach, evaluates the impact of the demand variation on the planned network. An application to an actual network is also presented.","PeriodicalId":205350,"journal":{"name":"ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202)","volume":"115 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115085663","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: 8
Frequency reuse efficiency in CDMA systems: from an uniform to a bell-shaped traffic distribution CDMA系统的频率复用效率:从均匀流量分布到钟形流量分布
ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202) Pub Date : 1998-08-09 DOI: 10.1109/ITS.1998.713110
C. K. d'Ávila, M. Yacoub
{"title":"Frequency reuse efficiency in CDMA systems: from an uniform to a bell-shaped traffic distribution","authors":"C. K. d'Ávila, M. Yacoub","doi":"10.1109/ITS.1998.713110","DOIUrl":"https://doi.org/10.1109/ITS.1998.713110","url":null,"abstract":"The frequency reuse efficiency for the reverse channel of a code division multiple access cellular system is obtained for different propagation environments and non-uniform traffic scenarios. The propagation environment is defined by its path loss coefficient and the traffic scenario as a two-dimensional Gaussian function which leads to a bell-shaped traffic distribution. The research is detailed for the case in which the peak of the two-dimensional Gaussian function is located at the same position of the central cell-site as that where the parameter F is obtained. For the other cell-sites the parameter is also obtained, but in a limited number of situations. This allows the use of a different efficiency factor for each cell of the system, instead of a constant value. The influence of the frequency reuse efficiency on the cell radius is also investigated for a particular case in which an analytical solution is derived. This analysis shows the strong impact of this factor on the cell area.","PeriodicalId":205350,"journal":{"name":"ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202)","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122950006","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
On performance of product codes employed in some typical Rayleigh fading channels 几种典型瑞利衰落信道中产品码的性能分析
ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202) Pub Date : 1998-08-09 DOI: 10.1109/ITS.1998.713086
D. Yuan, L. Zhang
{"title":"On performance of product codes employed in some typical Rayleigh fading channels","authors":"D. Yuan, L. Zhang","doi":"10.1109/ITS.1998.713086","DOIUrl":"https://doi.org/10.1109/ITS.1998.713086","url":null,"abstract":"Simulation results of product codes used in a group of typical mobile channels are reported. Compared with interleaved BCH codes, product codes can improve the BER of channels by a factor of ten times that of interleaved codes.","PeriodicalId":205350,"journal":{"name":"ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130155146","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
Fading-resistant transmission using built-in time diversity and several antennas 使用内置时分集和多个天线的抗衰落传输
ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202) Pub Date : 1998-08-09 DOI: 10.1109/ITS.1998.718425
G.A. De Silva, F. M. de Assis, M. Alencar
{"title":"Fading-resistant transmission using built-in time diversity and several antennas","authors":"G.A. De Silva, F. M. de Assis, M. Alencar","doi":"10.1109/ITS.1998.718425","DOIUrl":"https://doi.org/10.1109/ITS.1998.718425","url":null,"abstract":"Transmission over mobile fading channels requires some diversity scheme to obtain better error rates. The objective of this paper is to present systems that combine coded modulation with built-in time diversity, an optimized constellation and multiple transmission antennas. The transmission systems are simulated over fast-fading channels that present Doppler effects. A gain of 12 dB is attained in comparison with other proposed systems.","PeriodicalId":205350,"journal":{"name":"ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202)","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121307003","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
Multiple-antenna CDMA mobile reception using constrained normalized adaptive algorithms 基于约束归一化自适应算法的多天线CDMA移动接收
ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202) Pub Date : 1998-08-09 DOI: 10.1109/ITS.1998.713146
S. Werner, J. A. Apolinário, T. Laakso
{"title":"Multiple-antenna CDMA mobile reception using constrained normalized adaptive algorithms","authors":"S. Werner, J. A. Apolinário, T. Laakso","doi":"10.1109/ITS.1998.713146","DOIUrl":"https://doi.org/10.1109/ITS.1998.713146","url":null,"abstract":"We analyze adaptive algorithms for a multiple-antenna code division multiple access (CDMA) mobile receiver. We study the constrained versions of the binormalized data-reusing LMS (BNDR-LMS) and the normalized LMS (NLMS). Their performance is compared with that of the classical Frost algorithm. Time-varying step-sequences are used to further enhance the performance of the receiver. The results show that considerable improvement in the convergence speed can be achieved with the use of the normalized algorithms compared with the conventional Frost algorithm. Using an optimal step-sequence in the update provides a fast convergence and a near-optimum steady-state performance.","PeriodicalId":205350,"journal":{"name":"ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121555876","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: 5
Integrated design of digital communication systems for fixed channel conditions 固定信道条件下数字通信系统的集成设计
ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202) Pub Date : 1998-08-09 DOI: 10.1109/ITS.1998.713083
D. G. Daut, Wei-qun Ma
{"title":"Integrated design of digital communication systems for fixed channel conditions","authors":"D. G. Daut, Wei-qun Ma","doi":"10.1109/ITS.1998.713083","DOIUrl":"https://doi.org/10.1109/ITS.1998.713083","url":null,"abstract":"This paper presents a new algorithm for the integrated design of digital communication systems. In order to design the system as a whole, all the restrictions and key subsystems of a communication system are taken into consideration. The algorithm produces appropriate design parameter values for the source coding, channel coding and modulation functions. Several design examples are provided to illustrate the utility of the approach. This algorithm is quite general and not application-oriented, as was the case in prior work in joint source-channel coding. A large variety of existing methods for source coding, channel coding and modulation may be utilized in achieving a practical system design.","PeriodicalId":205350,"journal":{"name":"ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123790778","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: 5
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