发布求助
文献互助 智能选刊 最新文献

IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211)最新文献

筛选
英文 中文
Effects of Advanced Demand Signals scheme 超前需求信号计划的影响
IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211) Pub Date : 2001-10-07 DOI: 10.1109/VTC.2001.956862
Yasunori Kato, T. Hasegawa
{"title":"Effects of Advanced Demand Signals scheme","authors":"Yasunori Kato, T. Hasegawa","doi":"10.1109/VTC.2001.956862","DOIUrl":"https://doi.org/10.1109/VTC.2001.956862","url":null,"abstract":"This paper proposes the Advanced Demand Signals scheme (ADS) that is a traffic signal control scheme by vehicle demands, and evaluates its performance. Each vehicle in some range transmits the relative distance between the vehicle and the intersection using seamless and real-time road-to-vehicle communications. The traffic signal decides the light according to the demand that is calculated using the transmitted data. Performance evaluations are carried out using the simulator including three intersections with traffic signals. This simulator uses the average idling time as a performance index, and examines the basic performance effect of communication range, and effect of performance function. Consequently, it is shown that the ADS scheme is effective in almost all vehicle densities, and, in particular, the ADS scheme shortens the average idling time more than by a maximum of 90% compared with the most basic conventional control scheme with low vehicle density.","PeriodicalId":129008,"journal":{"name":"IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115336658","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
Capacity optimization with adaptive cell-size control for W-CDMA system 基于自适应小区大小控制的W-CDMA系统容量优化
IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211) Pub Date : 2001-10-07 DOI: 10.1109/VTC.2001.956502
K. Goto, Tomohiro Kitano, T. Suzuki, T. Hattori
{"title":"Capacity optimization with adaptive cell-size control for W-CDMA system","authors":"K. Goto, Tomohiro Kitano, T. Suzuki, T. Hattori","doi":"10.1109/VTC.2001.956502","DOIUrl":"https://doi.org/10.1109/VTC.2001.956502","url":null,"abstract":"In this paper, analysis is advanced by computer simulation for the purpose of an improvement of the capacity in W-CDMA. A situation in which there is some deviation on the user's distribution in the center cell, and the relation between cell size and capacity is evaluated. It is important to improve the capacity not only the reference cell but also the surrounding cells, when evaluating the capacity. By changing the cell-size, the result shows that the capacity can be improved by about 140 users especially in a center-focused distribution. Also, in the edge-focused distribution, the capacity can be improved by about 60 users. In addition, it is connected with the increase in the capacity by changing the cell-size even in the other user's distribution. The capacity increased by the effect of soft handoff. The larger the threshold was, the more the reverse link capacity increased. It is shown that the reverse link capacity is converged when threshold is about 6 dB.","PeriodicalId":129008,"journal":{"name":"IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211)","volume":"154 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116427347","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
Propagation estimation and transmission evaluation for 2.4GHz high speed wireless LAN 2.4GHz高速无线局域网的传播估计与传输评估
IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211) Pub Date : 2001-10-07 DOI: 10.1109/VTC.2001.957235
Y. Tatsuzawa, A. Nishizawa, T. Hattori
{"title":"Propagation estimation and transmission evaluation for 2.4GHz high speed wireless LAN","authors":"Y. Tatsuzawa, A. Nishizawa, T. Hattori","doi":"10.1109/VTC.2001.957235","DOIUrl":"https://doi.org/10.1109/VTC.2001.957235","url":null,"abstract":"The objectives of this paper are to show transmission characteristics and to establish the area estimation by modeling of the propagation characteristics and area of high speed wireless LAN systems. Six neighboring laboratories, courtyard, piloti, laboratories, and classrooms are used for measurement and estimation.","PeriodicalId":129008,"journal":{"name":"IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122495197","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
An analytical approach for determining coverage probabilities in large UMTS networks 确定大型UMTS网络覆盖概率的分析方法
IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211) Pub Date : 2001-10-07 DOI: 10.1109/VTC.2001.956500
Bernd Schröder, B. Liesenfeld, A. Weller, K. Leibnitz, D. Staehle, P. Tran-Gia
{"title":"An analytical approach for determining coverage probabilities in large UMTS networks","authors":"Bernd Schröder, B. Liesenfeld, A. Weller, K. Leibnitz, D. Staehle, P. Tran-Gia","doi":"10.1109/VTC.2001.956500","DOIUrl":"https://doi.org/10.1109/VTC.2001.956500","url":null,"abstract":"An analytical model for dimensioning and planning of large UMTS networks with varying service mixtures is presented. Given the distribution of the UMTS traffic and the attenuation between mobiles and base stations using any given path loss prediction, the uplink-coverage probabilities and call blocking rates can be determined for a realistic \"many cells-many mobiles\" case. Because of effects like \"cell breathing\" a precise calculation of in-cell and inter-cell interference is done simultaneously. Imperfection of power control is taken into account. This analytical model permits fast calculations in particular for large networks.","PeriodicalId":129008,"journal":{"name":"IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129552552","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: 14
Vectorial multipath channel estimation for the UTRA-TDD mode UTRA-TDD模式的矢量多径信道估计
IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211) Pub Date : 2001-10-07 DOI: 10.1109/VTC.2001.956505
P. Marques, A. Gameiro, J. Fernandes
{"title":"Vectorial multipath channel estimation for the UTRA-TDD mode","authors":"P. Marques, A. Gameiro, J. Fernandes","doi":"10.1109/VTC.2001.956505","DOIUrl":"https://doi.org/10.1109/VTC.2001.956505","url":null,"abstract":"This paper, deals with channel estimation for UTRA-TDD. Based on the algorithm suggested by the 3GPP for scalar channels, a maximum likelihood (ML) approach for vectorial channel estimation, to include also the estimation of the direction-of-arrival, is proposed. The performance of the algorithm is assessed by resorting to simulations in typical UMTS scenarios, and also by comparing the RMS estimation errors against the Cramer-Rao bound. The results show that good performance is achievable from low to high values of E/sub b//N/sub 0/, provided the path components are separated by more than 2 chips.","PeriodicalId":129008,"journal":{"name":"IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211)","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128205255","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
Physical-layer issues for deploying transmit diversity in GPRS/EGPRS networks 在GPRS/EGPRS网络中部署传输分集的物理层问题
IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211) Pub Date : 2001-10-07 DOI: 10.1109/VTC.2001.956827
K. Zangi, D. Hui, Jung-Fu Cheng
{"title":"Physical-layer issues for deploying transmit diversity in GPRS/EGPRS networks","authors":"K. Zangi, D. Hui, Jung-Fu Cheng","doi":"10.1109/VTC.2001.956827","DOIUrl":"https://doi.org/10.1109/VTC.2001.956827","url":null,"abstract":"Lindskog and Paulraj (see ICC-2000, June, 2000) proposed a transmit diversity scheme for dispersive channels which by utilizing two transmit antennas and only one receive antenna achieves the same diversity benefit (except for the 3 dB array gain) as can be achieved by using one transmit antenna and two receive antennas. This scheme generalizes Alamouti's (see IEEE JSAC, vol.16, no.8, p.1451-58, 1998) transmit diversity scheme (which works best for flat channels) to dispersive channels. We show how the transmit diversity (TXD) scheme of Lindskog et al. can be deployed in GPRS/FGPRS networks. A low-complexity receiver structure for demodulating Lindskog and Paulraj (LP) encoded signals is presented based on a combination of a novel pre-filter and a delayed decision feedback sequence estimation (DFSE) equalizer. This pre-filter is designed to simultaneously achieve three desired effects: (1) the effective baseband channel seen by the equalizer has half the number of taps of the original baseband channel; (2) the effective response of the baseband channel becomes minimum-phase; and (3) the effective baseband noise is whitened. An information-theoretic analysis is also presented to demonstrate the advantage of the LP scheme over other TXD schemes (e.g. over delay diversity). A burst format for transmitting LP encoded signals which is compatible with the existing GPRS/EGPRS burst format is also presented. Finally, simulations results are presented to verify the benefit of using the LP scheme in the typical urban channel of GSM/EDGE.","PeriodicalId":129008,"journal":{"name":"IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129001446","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: 14
M-ary MC-CDMA system for 4G 用于4G的m - mary MC-CDMA系统
IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211) Pub Date : 2001-10-07 DOI: 10.1109/VTC.2001.957142
Wuyang Zhou, Xiaowen Lu, Jinkang Zhu
{"title":"M-ary MC-CDMA system for 4G","authors":"Wuyang Zhou, Xiaowen Lu, Jinkang Zhu","doi":"10.1109/VTC.2001.957142","DOIUrl":"https://doi.org/10.1109/VTC.2001.957142","url":null,"abstract":"In this paper, we present a M-ary MC-CDMA system for 4G which can support data rates up to 20 Mbps. In the transmitter, data bits are serial to parallel converted, then applying M-ary orthogonal modulation, the modulated symbol is spread using each chip of complex orthogonal codes. In a frequency selective slowly fading channel, we analyze the system performance of the downlink.","PeriodicalId":129008,"journal":{"name":"IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211)","volume":"92 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124580326","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
'Errors-and-erasures' decoding performance of RS coded DS-CDMA using M-ary orthogonal signalling 使用M-ary正交信令的RS编码DS-CDMA的“错误和擦除”解码性能
IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211) Pub Date : 2001-10-07 DOI: 10.1109/VTC.2001.956441
Lie-liang Yang, L. Hanzo
{"title":"'Errors-and-erasures' decoding performance of RS coded DS-CDMA using M-ary orthogonal signalling","authors":"Lie-liang Yang, L. Hanzo","doi":"10.1109/VTC.2001.956441","DOIUrl":"https://doi.org/10.1109/VTC.2001.956441","url":null,"abstract":"In this contribution we investigate the performance of RS coded DS-CDMA using M-ary orthogonal signalling over multipath Rayleigh fading channels. 'Errors-and-erasures (EAE)' RS decoding is considered, where erasures are declared based on the joint maximum output and ratio threshold test (MOR-TT). Two classes of diversity reception techniques suitable for noncoherent M-ary detection are invoked, namely either equal gain combining (EGC) or selection combining (SC) and their related performance is evaluated for both uncoded and coded DS-CDMA systems. The performance of the proposed MOR-TT technique is compared to that of the ratio threshold test (RTT) and the output threshold test (OTT), as well as that of 'error-correction-only (ECO)' decoding. The numerical results show that when using EAE decoding, RS codes of a given code rate are capable of achieving a significantly higher coding gain than without erasure information. Furthermore, the MOR-TT technique outperforms both the RTT and the OTT techniques.","PeriodicalId":129008,"journal":{"name":"IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211)","volume":"331 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124670289","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
Delay-throughput performance of packet service in UMTS UMTS中分组业务的延迟吞吐量性能
IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211) Pub Date : 2001-10-07 DOI: 10.1109/VTC.2001.957120
F. Borgonovo, A. Capone, M. Cesana, L. Fratta
{"title":"Delay-throughput performance of packet service in UMTS","authors":"F. Borgonovo, A. Capone, M. Cesana, L. Fratta","doi":"10.1109/VTC.2001.957120","DOIUrl":"https://doi.org/10.1109/VTC.2001.957120","url":null,"abstract":"The UMTS W-CDMA radio interface is characterized by great flexibility and a variety of different physical and logical channel types, rates and protections are possible, by choosing suitable parameters, such as spreading factors, code rates and ARQ schemes. In this paper we present the results, obtained by a detailed simulation, about the effect of several parameters and system alternatives on the capacity of the downlink shared channel.","PeriodicalId":129008,"journal":{"name":"IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211)","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129534493","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
Block space time transmit diversity for 3GPP TDD mode 块空时传输分集3GPP TDD模式
IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211) Pub Date : 2001-10-07 DOI: 10.1109/VTC.2001.957084
O. Clop, Francesc Boixadera, A. Taffin
{"title":"Block space time transmit diversity for 3GPP TDD mode","authors":"O. Clop, Francesc Boixadera, A. Taffin","doi":"10.1109/VTC.2001.957084","DOIUrl":"https://doi.org/10.1109/VTC.2001.957084","url":null,"abstract":"Space time transmit diversity (STTD) was selected as the open loop transmit diversity technique for the 3GPP FDD mode and can be applied to most FDD downlink physical channels. However, implementation of STTD in conjunction with multiuser detection (MUD) receivers presents high computational requirements to the mobile station. This paper introduces a novel STTD implementation that allows development of lower complexity MUD receivers. This scheme is the standardized 3GPP TDD mode open loop transmit diversity scheme for the P-CCPCH (primary common control physical channel).","PeriodicalId":129008,"journal":{"name":"IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211)","volume":"952 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126998727","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
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：604180095
Book学术官方微信