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

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Inequalities involving the second order variational distance and the relative entropy 涉及二阶变分距离和相对熵的不等式
ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202) Pub Date : 1998-08-09 DOI: 10.1109/ITS.1998.713123
M.S. Alencar, F.M. Assis
{"title":"Inequalities involving the second order variational distance and the relative entropy","authors":"M.S. Alencar, F.M. Assis","doi":"10.1109/ITS.1998.713123","DOIUrl":"https://doi.org/10.1109/ITS.1998.713123","url":null,"abstract":"Relations between the second order variational distance and Killback Leibler distance of two distributions P={p/sub 1/...,p/sub N/} and Q={q/sub 1/,...,q/sub N/} on the alphabet A={a/sub 1/,...,a/sub N/}, are found.","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":"132794901","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
An analysis of signaling traffic for authentication and privacy protocols in cellular and PCS systems 蜂窝和PCS系统中认证和隐私协议的信令流量分析
ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202) Pub Date : 1998-08-09 DOI: 10.1109/ITS.1998.713141
H.L. Galiano, L. Ling
{"title":"An analysis of signaling traffic for authentication and privacy protocols in cellular and PCS systems","authors":"H.L. Galiano, L. Ling","doi":"10.1109/ITS.1998.713141","DOIUrl":"https://doi.org/10.1109/ITS.1998.713141","url":null,"abstract":"An overview of the security mechanisms for cellular phone systems and the emerging PCS systems and a description of the signal flow due to authentication and privacy protocols are presented. Using a mobility model for cellular systems we make an analysis of signaling traffic for these protocols.","PeriodicalId":205350,"journal":{"name":"ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202)","volume":"25 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":"130538435","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
Is the Ethernet LAN traffic over frame-relay in ATM networks self-similar? 以太局域网流量在ATM网络中的帧中继自相似吗?
ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202) Pub Date : 1998-08-09 DOI: 10.1109/ITS.1998.713101
F. Perlingeiro, L. Ling
{"title":"Is the Ethernet LAN traffic over frame-relay in ATM networks self-similar?","authors":"F. Perlingeiro, L. Ling","doi":"10.1109/ITS.1998.713101","DOIUrl":"https://doi.org/10.1109/ITS.1998.713101","url":null,"abstract":"Several recent studies mainly through simulation have been done to show the fractal behavior of traffic in ATM networks and its adverse effects over ATM switches. In this paper our goal is to study the effects of Ethernet LAN traffic over a frame-relay protocol in terms of the performance of the ATM switches. We have found that the Ethernet LAN traffic encapsulated under the frame-relay protocol does not cause impacts on a ATM input buffer at all.","PeriodicalId":205350,"journal":{"name":"ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202)","volume":"1 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":"131338657","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
WLL field trials in Brazil WLL在巴西的实地试验
ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202) Pub Date : 1998-08-09 DOI: 10.1109/ITS.1998.718424
D. Meira, E. Moreno, F.M. Filho, G.A. Gimenez, H. J. Souza, J.A. Silva, J. A. Martins, J. Madrid, M. Iramina, O. Branquinho, P.E. Macedo, R. Dillenburg, R. Petry, S. Canesin, S. Yamamoto
{"title":"WLL field trials in Brazil","authors":"D. Meira, E. Moreno, F.M. Filho, G.A. Gimenez, H. J. Souza, J.A. Silva, J. A. Martins, J. Madrid, M. Iramina, O. Branquinho, P.E. Macedo, R. Dillenburg, R. Petry, S. Canesin, S. Yamamoto","doi":"10.1109/ITS.1998.718424","DOIUrl":"https://doi.org/10.1109/ITS.1998.718424","url":null,"abstract":"Field trials of 20 WLL systems of several technologies, developed by 13 different manufacturers, were recently hosted by 11 carrier companies of the TELEBRAS System, resulting in the largest and the most complete WLL field trials performed in the world so far. This paper presents some information about the history of these trials. The basic design and tests as well as the main results and conclusions concerning spurious emission, interference, coverage and service transparency to the users are presented. Due to the non-disclosure agreement established between TELEBRAS and the manufacturers, no results of a specific WLL product is presented, nor a comparison between them. The presentation of the results is general, at a level of detail sufficient to show the real potentiality of the WLL technology as a alternative to the wired network in the provision of high-quality telecommunications services. Additionally, the main features of the WLL technologies are presented.","PeriodicalId":205350,"journal":{"name":"ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202)","volume":"453 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":"131473952","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 195K FFT/s (256-points) high performance FFT/IFFT processor for OFDM applications 用于OFDM应用的195K FFT/s(256点)高性能FFT/IFFT处理器
ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202) Pub Date : 1998-08-09 DOI: 10.1109/ITS.1998.713131
M. Vergara, M. Strum, W. Eberle, B. Gyselinckx
{"title":"A 195K FFT/s (256-points) high performance FFT/IFFT processor for OFDM applications","authors":"M. Vergara, M. Strum, W. Eberle, B. Gyselinckx","doi":"10.1109/ITS.1998.713131","DOIUrl":"https://doi.org/10.1109/ITS.1998.713131","url":null,"abstract":"A 256-point pipelined FFT/IFFT processor chip is described which implements OFDM modulation/demodulation functions. The architecture attains a sustained throughput of 195K FFT/s with incoming data rates of 100 MB/s. The 6.25 mm/sup 2/, 31300 gates chip was fully synthesized using 0.5 /spl mu/m, 3-layer metal CMOS process and operates at a frequency of 50 MHz.","PeriodicalId":205350,"journal":{"name":"ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202)","volume":"104 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":"133697689","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
Detection of trellis-coded modulation on frequency-non-selective Rayleigh fading channel 频率非选择性瑞利衰落信道中栅格编码调制的检测
ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202) Pub Date : 1998-08-09 DOI: 10.1109/ITS.1998.713087
T. Sugahara, R. Sampaio-Neto
{"title":"Detection of trellis-coded modulation on frequency-non-selective Rayleigh fading channel","authors":"T. Sugahara, R. Sampaio-Neto","doi":"10.1109/ITS.1998.713087","DOIUrl":"https://doi.org/10.1109/ITS.1998.713087","url":null,"abstract":"We look into a new strategy for detecting signals with trellis-coded modulation transmitted over a frequency-non-selective fading channel. For both interleaved and non-interleaved systems, the Viterbi algorithm is used to minimize an additive metric which incorporates estimates of the fading samples in each symbol interval. Kalman estimators are used to recursively update these estimates on a per-survivor basis whereupon, at a given instant, a distinct estimate is associated to each trellis node. Bit error rate curves are evaluated by computer simulations and compared to curves obtained assuming ideal fading knowledge and to curves pertaining to other methods in the literature.","PeriodicalId":205350,"journal":{"name":"ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202)","volume":"2015 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":"127723334","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
Multi-carrier CDMA system using multi-antenna for indoor wireless communication 多载波CDMA系统采用多天线进行室内无线通信
ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202) Pub Date : 1998-08-09 DOI: 10.1109/ITS.1998.713096
I. Jeong, M. Nakagawa
{"title":"Multi-carrier CDMA system using multi-antenna for indoor wireless communication","authors":"I. Jeong, M. Nakagawa","doi":"10.1109/ITS.1998.713096","DOIUrl":"https://doi.org/10.1109/ITS.1998.713096","url":null,"abstract":"This paper presents a multi-carrier code division multiple access (MC-CDMA) system for indoor wireless communication. MC systems using frequency diversity are not useful for typical indoor channels in a frequency nonselective fading environment. This is because the envelopes received by sub-carriers have highly correlated fading patterns with respect to each other. We introduce multiple antenna to the sub-carriers of the MC-CDMA system in order to obtain independent fading patterns. The performance of the proposed system is analyzed and compared with the conventional MC-CDMA system and CDMA system with distributed antenna.","PeriodicalId":205350,"journal":{"name":"ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202)","volume":"53 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":"116694767","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
Superconductivity in generic microstrip line with multilayer semiconductor substrate 多层半导体衬底通用微带线的超导性
ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202) Pub Date : 1998-08-09 DOI: 10.1109/ITS.1998.718429
H. Fernandes, G. de Brito Lima, W.P. Pereira
{"title":"Superconductivity in generic microstrip line with multilayer semiconductor substrate","authors":"H. Fernandes, G. de Brito Lima, W.P. Pereira","doi":"10.1109/ITS.1998.718429","DOIUrl":"https://doi.org/10.1109/ITS.1998.718429","url":null,"abstract":"The theory of multilayer shielded and open microstrip lines considering the superconductor strip on semiconductor regions is presented. The transverse transmission line (TTL) is used in the analysis. The superconductor effect is included in the boundary conditions with the surface impedance that is related to the complex conductivity of the material, calculated from the advanced two-fluid model. Applying the moment method the complex propagation constant of the structure, including the phase constant and the attenuation constant is obtained. Results are presented for the complex propagation constant, versus the frequency and the temperature, of this multilayer superconducting microstrip line.","PeriodicalId":205350,"journal":{"name":"ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202)","volume":"320 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":"115748811","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
Maximizing the cell goodput during overloads in ATM multiplexers 在ATM多路复用器中，在过载期间最大限度地提高单元利用率
ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202) Pub Date : 1998-08-09 DOI: 10.1109/ITS.1998.713114
N. Fonseca, M.J. Ferreira
{"title":"Maximizing the cell goodput during overloads in ATM multiplexers","authors":"N. Fonseca, M.J. Ferreira","doi":"10.1109/ITS.1998.713114","DOIUrl":"https://doi.org/10.1109/ITS.1998.713114","url":null,"abstract":"We introduce a novel packet discarding policy called longest-packet-in (LPI) which maximizes the cell goodput, the ratio of outgoing good cells to the total number of cells that arrive at a queue. We compare LPI to tail drop, early packet discard, early packet discard with hysteresis and fair early packet discard with hysteresis by investigating the trade-off between maximizing the cell goodput and maximizing the packet goodput. Furthermore, we evaluate the impact of network load, mean packet size, and the Hurst parameter on both the cell goodput and the packet goodput.","PeriodicalId":205350,"journal":{"name":"ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202)","volume":"1 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":"130888964","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
Packet dropping probability determination for PRMA systems with data 带数据的PRMA系统丢包概率的确定
ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202) Pub Date : 1998-08-09 DOI: 10.1109/ITS.1998.713109
P. Jeszensky, J. D. de Lima
{"title":"Packet dropping probability determination for PRMA systems with data","authors":"P. Jeszensky, J. D. de Lima","doi":"10.1109/ITS.1998.713109","DOIUrl":"https://doi.org/10.1109/ITS.1998.713109","url":null,"abstract":"The main objective of this paper is to extend previously published results about simultaneous voice and data transmission on PRMA (packet reservation multiple access) systems (Nanda, 1990). With this new approach more rigorous results are obtained which confirm the feasibility of the proposed system.","PeriodicalId":205350,"journal":{"name":"ITS'98 Proceedings. SBT/IEEE International Telecommunications Symposium (Cat. No.98EX202)","volume":"82 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":"116042336","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
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