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

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Throughput evaluation of TMN EMS for ATM switch ATM交换机TMN EMS的吞吐量评估
ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202) Pub Date : 1998-08-09 DOI: 10.1109/ITS.1998.718457
W. Woo, Hee-San Hwang, B. N. Yoon
{"title":"Throughput evaluation of TMN EMS for ATM switch","authors":"W. Woo, Hee-San Hwang, B. N. Yoon","doi":"10.1109/ITS.1998.718457","DOIUrl":"https://doi.org/10.1109/ITS.1998.718457","url":null,"abstract":"The development of the TMN (telecommunication management network) system is active in Korea. ETRI has developed TMN EMS (element management system) with the development of an ATM switch. In the next year, these systems will be in operation in the Korean ATM network. We introduce our EMS and analyse the throughput of EMS. In order to analyse the throughput, we use an open queuing network model and actual measurement data. The results of the analysis are useful when the TMN management network is set up.","PeriodicalId":205350,"journal":{"name":"ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202)","volume":"107 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":"123228012","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
Performance analysis of non-interleaved concatenated codes on time-correlated fading channels 时间相关衰落信道上非交织串接码的性能分析
ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202) Pub Date : 1998-08-09 DOI: 10.1109/ITS.1998.713085
C. Pimentel
{"title":"Performance analysis of non-interleaved concatenated codes on time-correlated fading channels","authors":"C. Pimentel","doi":"10.1109/ITS.1998.713085","DOIUrl":"https://doi.org/10.1109/ITS.1998.713085","url":null,"abstract":"We present an analytical method for evaluating the performance of non-interleaved concatenated codes over channels modeled as a non-frequency-selective, time-correlated Rician fading channel with a known power spectral density. The main idea is to model the communication system from the modulator input to the demodulator output as a binary finite state channel (FSC) model, and apply powerful enumeration techniques to such a discrete channel in order to gain useful information on system performance. The concatenated scheme makes use of two codes: Reed Solomon (RS) codes are employed for the outer code, and binary block codes are used as the inner code. This is an interesting alternative approach with respect to computer simulations.","PeriodicalId":205350,"journal":{"name":"ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202)","volume":"60 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":"121700186","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
Performance enhancement of DS-CDMA system for wireless local loop 无线本地环路中DS-CDMA系统的性能增强
ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202) Pub Date : 1998-08-09 DOI: 10.1109/ITS.1998.713095
B. Ng, E. Sousa
{"title":"Performance enhancement of DS-CDMA system for wireless local loop","authors":"B. Ng, E. Sousa","doi":"10.1109/ITS.1998.713095","DOIUrl":"https://doi.org/10.1109/ITS.1998.713095","url":null,"abstract":"In this paper, performance enhancement of wireless local loops (WLL) employing spatial division multiple access (SDMA) with orthogonal CDMA for both forward link and quasi-synchronous reverse link is investigated. The static channel characteristic of WLL allows base station adaptive antenna arrays and subscriber directional antennas to be used effectively. In such an environment, dynamic sectorization is introduced and a simple dynamic spreading code assignment scheme is proposed to assign codes for users in different areas. Simulations results are presented which demonstrate that using orthogonal CDMA/SDMA with the proposed dynamic code assignment scheme shows drastic improvement over using SDMA or orthogonal CDMA alone.","PeriodicalId":205350,"journal":{"name":"ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202)","volume":"74 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":"121719381","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
On the statistics of the Nakagami-m signal 关于中上米信号的统计
ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202) Pub Date : 1998-08-09 DOI: 10.1109/ITS.1998.718421
M. Yacoub, J.E. Vargas B., L. de R. Guedes
{"title":"On the statistics of the Nakagami-m signal","authors":"M. Yacoub, J.E. Vargas B., L. de R. Guedes","doi":"10.1109/ITS.1998.718421","DOIUrl":"https://doi.org/10.1109/ITS.1998.718421","url":null,"abstract":"This paper proposes a fading model that leads to a formal, but simple, method to obtain the exact formula of the Nakagami-m distribution for m=n/2, n a non-zero integer number. Based on such a model the joint distribution of the envelope and its time derivative is accomplished and exact formulas for the level crossing rate (closed-form formula) and for the average fade duration are derived. Simulation curves and exact formulas are checked against each other and a perfect agreement between them is attained. Although derived for discrete values of m (m being an integer multiple of 1/2 ) there are no mathematical constraints for these expressions to be used for any real value m/spl ges/ 1/2.","PeriodicalId":205350,"journal":{"name":"ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202)","volume":"10 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":"131136656","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
Amplifier spacing assessment for enhanced power soliton transmission over 10 Mm in standard and DS fibers 标准光纤和DS光纤中10mm以上功率孤子传输增强放大器间距评估
ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202) Pub Date : 1998-08-09 DOI: 10.1109/ITS.1998.718465
R.T.R. de Almeida, L. De C. Calmon, M. Ribeiro, M. Freitas
{"title":"Amplifier spacing assessment for enhanced power soliton transmission over 10 Mm in standard and DS fibers","authors":"R.T.R. de Almeida, L. De C. Calmon, M. Ribeiro, M. Freitas","doi":"10.1109/ITS.1998.718465","DOIUrl":"https://doi.org/10.1109/ITS.1998.718465","url":null,"abstract":"The entire cost of an optical soliton-based communication system is directly related to the number of optical amplifiers used to manage energy loss along the link to maintain soliton power penalty under an adopted limit. This paper states a method of analyzing and quantifying pulse stabilization and noiseless amplifier spanning by the manipulation of pulse power enhancement for different types of fiber.","PeriodicalId":205350,"journal":{"name":"ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202)","volume":"12 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":"121864224","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
Complex algorithm in frequency domain optimization using first order linear transversal filters in parallel and prefiltering in input signal 在频域优化中采用一阶线性横向并行滤波和输入信号预滤波的复算法
ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202) Pub Date : 1998-08-09 DOI: 10.1109/ITS.1998.718435
S.L. De Andrade Silva, M. A. Marcelino, W. Perrella
{"title":"Complex algorithm in frequency domain optimization using first order linear transversal filters in parallel and prefiltering in input signal","authors":"S.L. De Andrade Silva, M. A. Marcelino, W. Perrella","doi":"10.1109/ITS.1998.718435","DOIUrl":"https://doi.org/10.1109/ITS.1998.718435","url":null,"abstract":"This paper presents the adaptive IIR filtering with a parallel form realization in a system identification application using a prefiltering algorithm and distinct initialization for each section of the parallel filter. The frequency domain implementation and a recursive frequency sampling structure was used in computer simulation and the results present gains in convergence speed and in the stability of the adaptive filtering.","PeriodicalId":205350,"journal":{"name":"ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202)","volume":"103 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":"116011095","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 new model for optimal planning of synchronous digital hierarchy unidirectional rings 同步数字层次单向环优化规划新模型
ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202) Pub Date : 1998-08-09 DOI: 10.1109/ITS.1998.713142
R. Nakamura, H. Tavares
{"title":"A new model for optimal planning of synchronous digital hierarchy unidirectional rings","authors":"R. Nakamura, H. Tavares","doi":"10.1109/ITS.1998.713142","DOIUrl":"https://doi.org/10.1109/ITS.1998.713142","url":null,"abstract":"With the technological advances being made in telecommunication transmission, synchronous digital hierarchy (SDH) is replacing plesiochronous digital hierarchy (PDH). Thus, ring network topologies are being widely used by Telebras system operating companies. This paper proposes a model for planning SDH unidirectional rings which allocates and dimensions the equipment to be used, makes the routing in order to meet traffic demands and minimizes the network costs. Mixed integer linear programming is used in which the traffic between network nodes is represented by a multicommodity flow associated to an origin-destination matrix, and the network is represented by a graph. The model for interconnecting unidirectional rings is made with the additional constraint that real variables are used. This is unprecedented in the literature. The paper also presents the results obtained when the model was applied to two urban networks.","PeriodicalId":205350,"journal":{"name":"ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202)","volume":"8 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":"116479093","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
Enhancing an optical access network with ADSL technology 利用ADSL技术增强光接入网
ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202) Pub Date : 1998-08-09 DOI: 10.1109/ITS.1998.718454
W. Kluge
{"title":"Enhancing an optical access network with ADSL technology","authors":"W. Kluge","doi":"10.1109/ITS.1998.718454","DOIUrl":"https://doi.org/10.1109/ITS.1998.718454","url":null,"abstract":"This paper gives a short overview on narrowband access networks and the need for enhancing these networks with ADSL transmission techniques. After a short introduction to ADSL, the current status of the standardization process for ADSL is reflected. A major open topic in the physical layer is ADSL over ISDN transmission. There are many other open issues for higher layers. The work of the ADSL Forum is reflected.","PeriodicalId":205350,"journal":{"name":"ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202)","volume":"105 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":"124025113","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 nonuniform segmentation approach based on Kohonen network for isolated word speech recognition 基于Kohonen网络的非均匀分割方法在孤立词语音识别中的应用
ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202) Pub Date : 1998-08-09 DOI: 10.1109/ITS.1998.713104
F. L. Figueiredo, F. Violaro
{"title":"A nonuniform segmentation approach based on Kohonen network for isolated word speech recognition","authors":"F. L. Figueiredo, F. Violaro","doi":"10.1109/ITS.1998.713104","DOIUrl":"https://doi.org/10.1109/ITS.1998.713104","url":null,"abstract":"This paper describes an algorithm for nonuniform segmentation of isolated words using a Kohonen neural network. This procedure performs a temporal normalization necessary to allow the multilayer perception neural network to be used to recognize the spoken words.","PeriodicalId":205350,"journal":{"name":"ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202)","volume":"196 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":"134410923","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 new CAD package in photonics study-PACFOTON I 一个新的光子学研究CAD软件包pacfoton I
ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202) Pub Date : 1998-08-09 DOI: 10.1109/ITS.1998.718467
H. Fernandes, R.L.M. Lima, W.P. Pereira, L. C. Freitas
{"title":"A new CAD package in photonics study-PACFOTON I","authors":"H. Fernandes, R.L.M. Lima, W.P. Pereira, L. C. Freitas","doi":"10.1109/ITS.1998.718467","DOIUrl":"https://doi.org/10.1109/ITS.1998.718467","url":null,"abstract":"We propose a new computer package, PACFOTON I, with an educational objective, for the analysis of light behavior through device gates and the analysis of soliton pulses using the 4th-order Runge-Kutta method. We give an analysis of soliton pulses and electro-optic devices such as the directional coupler and intensity modulator.","PeriodicalId":205350,"journal":{"name":"ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202)","volume":"48 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":"123863696","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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