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VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151)最新文献

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Some new outlooks on burst error correcting capabilities of Reed-Solomon codes with applications in mobile communications Reed-Solomon码的突发纠错能力及其在移动通信中的应用
VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151) Pub Date : 1998-05-21 DOI: 10.1109/VETEC.1998.686592
B. Kamali
{"title":"Some new outlooks on burst error correcting capabilities of Reed-Solomon codes with applications in mobile communications","authors":"B. Kamali","doi":"10.1109/VETEC.1998.686592","DOIUrl":"https://doi.org/10.1109/VETEC.1998.686592","url":null,"abstract":"Some bounds on the required number of parity check symbols for\u0000burst error correction are discussed. Equations determining burst error\u0000correction capabilities of Reed-Solomon (RS) codes constructed over\u0000Galois fields of characteristic two are presented. Tables providing\u0000burst error correction capabilities of RS codes constructed over GF(256)\u0000and GF(64) are provided. Some applications of RS codes in mobile\u0000communications are covered, in particular the selection of the (63,47)\u0000RS codes for Cellular Digital Packet Data (CDPD) networks is explained.\u0000One legitimate concern regarding the application of RS codes in mobile\u0000communications is the computational complexity of the RS codes standard\u0000decoding method. Three alternative decoding techniques, suitable for RS\u0000codes with low error correcting capability are described","PeriodicalId":335954,"journal":{"name":"VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121902985","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
An investigation of measured and simulated wideband channels with applications to 1.25 MHz and 5 MHz CDMA systems 应用于1.25 MHz和5 MHz CDMA系统的测量和模拟宽带信道的研究
VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151) Pub Date : 1998-05-21 DOI: 10.1109/VETEC.1998.686637
Henrik Asplund, A. Glazunov, Andres Berg, A. A. Glazunov, Jan-Erik Berg, Stockholm Sweden
{"title":"An investigation of measured and simulated wideband channels with applications to 1.25 MHz and 5 MHz CDMA systems","authors":"Henrik Asplund, A. Glazunov, Andres Berg, A. A. Glazunov, Jan-Erik Berg, Stockholm Sweden","doi":"10.1109/VETEC.1998.686637","DOIUrl":"https://doi.org/10.1109/VETEC.1998.686637","url":null,"abstract":"Fading of the wideband radio channel and its implications for CDMA RAKE receiver operation has been investigated using measured wideband impulse responses and simulations with an exponentially shaped channel model. The emphasis has been on systems with 1.25 MHz and 5 MHz bandwidth, and the reduction in fading variations as well as the increased complexity in terms of required RAKE correlator branches when increasing the bandwidth has been studied. An analysis of the consequences of fast power control has also been performed.","PeriodicalId":335954,"journal":{"name":"VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151)","volume":"253 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121689474","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
Millimeter-wave broadband wireless access system with tracking technology of moving targets 采用运动目标跟踪技术的毫米波宽带无线接入系统
VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151) Pub Date : 1998-05-18 DOI: 10.1109/VETEC.1998.686118
Y. Okada, H. Tsuji, H. Kagiwada, A. Sano
{"title":"Millimeter-wave broadband wireless access system with tracking technology of moving targets","authors":"Y. Okada, H. Tsuji, H. Kagiwada, A. Sano","doi":"10.1109/VETEC.1998.686118","DOIUrl":"https://doi.org/10.1109/VETEC.1998.686118","url":null,"abstract":"There is growing interest in wireless access systems, which can provide multimedia network services. Some wireless access systems which limit the terminal's mobility, already have been proposed. However, a system supporting higher mobility, such as use in a car, is expected in the near future. We are investigating the technical feasibility of such a system. We describe our system and present a new approach for tracking moving targets, which is the key to the system. Finally, some simulation results are also revealed.","PeriodicalId":335954,"journal":{"name":"VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151)","volume":"125 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123128937","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
Performance of frequency domain multiuser detector for synchronous CDMA communication over Rician fading channels 同步CDMA信道频域多用户检波器性能研究
VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151) Pub Date : 1998-05-18 DOI: 10.1109/VETEC.1998.686051
Wan Choi, Youngkwon Cho, Jae Hong Lee
{"title":"Performance of frequency domain multiuser detector for synchronous CDMA communication over Rician fading channels","authors":"Wan Choi, Youngkwon Cho, Jae Hong Lee","doi":"10.1109/VETEC.1998.686051","DOIUrl":"https://doi.org/10.1109/VETEC.1998.686051","url":null,"abstract":"The performance of frequency domain multiuser detector (FD-MUD) proposed by Lops, Ricci, and Tulino (see IEEE ISSSTA '96, p.541-5, Mainz, Germany, 1996) is analyzed over a Rician fading channel. The bit error probabilities for FD-MUD with coherent detection and differentially coherent detection are derived. The results are compared with those of the decorrelating detector. Through numerical examples, it is shown that the FD-MUD has a lower bit error rate than the decorrelating detector over a Rician fading channel. It is also shown that the FD-MUD has a robustness to narrowband interference. In addition, the advantages of the FD-MUD over decorrelating detector in implementation of the detector are investigated.","PeriodicalId":335954,"journal":{"name":"VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151)","volume":"158 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116663793","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
WATM operation optimisation based on effect of FEC code rate and ARQ retransmission 基于FEC码率和ARQ重传影响的WATM运行优化
VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151) Pub Date : 1998-05-18 DOI: 10.1109/VETEC.1998.686218
P. L. Hiew, M. Zukerman, M. Gitlits
{"title":"WATM operation optimisation based on effect of FEC code rate and ARQ retransmission","authors":"P. L. Hiew, M. Zukerman, M. Gitlits","doi":"10.1109/VETEC.1998.686218","DOIUrl":"https://doi.org/10.1109/VETEC.1998.686218","url":null,"abstract":"This paper applies a new methodology to different coding schemes for WATM efficiency evaluation. This methodology is based on the separation of error based efficiency (EBE), which is the ratio between the mean raw data rate and the raw data rate plus all overheads associated with error corrections and retransmission of erroneous blocks of data, from queuing based efficiency (QBE), which is the ratio between the error free data rate and the overall channel capacity. We compare between the efficiency of convolutional coding (in the case of binary transmission and high level modulation transmission) and turbo coding. We show that under most value of signal to noise ratio (SNR), turbo coding is the most efficient. We also provide means to support optimal adaptive setting of the code rate and demonstrate the improvement gained by implementing adaptive forward error correction code rate. We further demonstrate that, for certain realistic SNR conditions, the wastage due to retransmissions can be very high.","PeriodicalId":335954,"journal":{"name":"VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151)","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117112256","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
High speed circuit switched data over GSM: potential traffic policies GSM高速电路交换数据:潜在的流量策略
VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151) Pub Date : 1998-05-18 DOI: 10.1109/VETEC.1998.686444
D. Calin, D. Zeghlache
{"title":"High speed circuit switched data over GSM: potential traffic policies","authors":"D. Calin, D. Zeghlache","doi":"10.1109/VETEC.1998.686444","DOIUrl":"https://doi.org/10.1109/VETEC.1998.686444","url":null,"abstract":"A performance evaluation of the new HSCSD service specified by the ETSI for GSM networks is conducted with the objective of maintaining QoS for the existing voice service. Potential traffic policies to handle this new traffic are investigated. In particular, flexible resource assignment is considered and the notion of effective service time for HSCSD calls introduced. This parameter, proportional to the bandwidth negotiated with the base station, is related to the average achievable bit rate. The effect of channel allocation constraints is also investigated. Delays experienced by HSCSD calls are compared to an optimal transmission operating at the maximum capacity.","PeriodicalId":335954,"journal":{"name":"VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127459133","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
Performance analysis of the forward and reverse control channels of CDMA cellular networks CDMA蜂窝网络正反向控制信道的性能分析
VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151) Pub Date : 1998-05-18 DOI: 10.1109/VETEC.1998.686381
G. Wan, M.A. Landolsi, S. Tseng
{"title":"Performance analysis of the forward and reverse control channels of CDMA cellular networks","authors":"G. Wan, M.A. Landolsi, S. Tseng","doi":"10.1109/VETEC.1998.686381","DOIUrl":"https://doi.org/10.1109/VETEC.1998.686381","url":null,"abstract":"This paper discusses the performance of the forward and reverse control channels of the IS-95 CDMA standard, known as the paging and access channels, respectively. Modeling and simulation work was conducted to quantify the performance of these channels in terms of traffic handling capacity, average message delays, blocking levels, etc. The results shown are based on a specific system call model, and serve as illustrative guidelines for the proper engineering of these control channels, which have a major impact on the overall performance of cellular networks.","PeriodicalId":335954,"journal":{"name":"VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125871107","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 physical-statistical propagation model for diversity in mobile satellite PCN 移动卫星PCN中分集的物理统计传播模型
VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151) Pub Date : 1998-05-18 DOI: 10.1109/VETEC.1998.686629
C. Tzaras, S. Saunders, B. Evans
{"title":"A physical-statistical propagation model for diversity in mobile satellite PCN","authors":"C. Tzaras, S. Saunders, B. Evans","doi":"10.1109/VETEC.1998.686629","DOIUrl":"https://doi.org/10.1109/VETEC.1998.686629","url":null,"abstract":"This paper proposes a physical-statistical model of satellite diversity, for particular application to non-geostationary satellite PCN systems operated in built-up areas. The output of the model is an explicit formulation for the correlation between shadowing states associated with pairs of satellites, which can be used as input for Markov models of the satellite channel. Results are presented for a number of practical cases and are found to be in excellent agreement with analysis of real buildings.","PeriodicalId":335954,"journal":{"name":"VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125536344","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: 10
An intelligent radio resource management scheme for multilayered cellular system with different bandwidths 一种不同带宽的多层蜂窝系统无线资源智能管理方案
VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151) Pub Date : 1998-05-18 DOI: 10.1109/VETEC.1998.686511
F. Kojima, S. Sampei, N. Morinaga
{"title":"An intelligent radio resource management scheme for multilayered cellular system with different bandwidths","authors":"F. Kojima, S. Sampei, N. Morinaga","doi":"10.1109/VETEC.1998.686511","DOIUrl":"https://doi.org/10.1109/VETEC.1998.686511","url":null,"abstract":"This paper proposes a spatially distributed control scheme for a multi-layered cellular system to achieve flexible and high capacity wireless communication systems under any traffic conditions including nonuniform traffic conditions. In the proposed system, terminals with lower mobility are connected to the wideband microcell systems to support a variety of services including high bit rate data transmission, and terminals with higher mobility are connected to the narrowband macrocell systems to reduce intercell hand-off frequency. To flexibly cope with temporal and spatial variations of traffic conditions, the ratio of the microcell and macrocell terminals as well as system bandwidths are adaptively and autonomously shared by both systems, and its control is conducted by each base station of microcells. Computer simulation confirms that the proposed scheme can achieve lower blocking probability than the centralized scheme under nonuniform traffic conditions due to its spatially distributed control.","PeriodicalId":335954,"journal":{"name":"VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115081977","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
Capacity of DECT wireless local loop system in multi-cell environment 多小区环境下DECT无线局部环路系统的容量
VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151) Pub Date : 1998-05-18 DOI: 10.1109/VETEC.1998.686431
J. Ling, C. Trabelsi, R. Valenzuela
{"title":"Capacity of DECT wireless local loop system in multi-cell environment","authors":"J. Ling, C. Trabelsi, R. Valenzuela","doi":"10.1109/VETEC.1998.686431","DOIUrl":"https://doi.org/10.1109/VETEC.1998.686431","url":null,"abstract":"The wireless local loop (WLL) provides reliable, flexible, and economical access to the local telephone service using radio technology in the place of traditional copper wireline. A variety of wireless technologies are available for the local loop. Digital enhanced cordless telecommunications (DECT) is one of these. Several DECT based WLL products from different vendors have been commercially deployed, or are under trial worldwide. Many of these systems have been installed in rural areas in a single cell-configuration, but many also in built-up areas in multi-cell configurations. The capacity of these multi-cell systems is not well known, due to the variable number of channels available at a given instant in time. In this paper we present the results of thorough simulation of a DECT based WLL system in a multi-cell environment.","PeriodicalId":335954,"journal":{"name":"VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151)","volume":"137 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115189387","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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