IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211)最新文献_第5页

A QoS-based indoor wireless data network design for VoIP applications 基于qos的室内无线数据网络设计，用于VoIP应用

IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211) Pub Date : 2001-10-07 DOI: 10.1109/VTC.2001.957220

R. Shirdokar, J. Kabara, P. Krishnamurthy

{"title":"A QoS-based indoor wireless data network design for VoIP applications","authors":"R. Shirdokar, J. Kabara, P. Krishnamurthy","doi":"10.1109/VTC.2001.957220","DOIUrl":"https://doi.org/10.1109/VTC.2001.957220","url":null,"abstract":"Multiple factors are contributing to the surge in the demand for wireless LAN (WLAN): laptop penetration, increased user mobility, ubiquitous access to the Internet and intranets, and newly introduced voice over IP (VoIP) capabilities. Today almost all popular wireless LAN applications such as Web access, E-mail processing, telnet, FTP, and database access are using a client-server architecture. However, the number of supported mobile nodes depends on the type of application the user employs. Thus, evaluation of the number of voice users supported by a wireless LAN access point is beginning to attract the attention of those involved in deployment of wireless LAN. Currently, most commercial wireless data networks are arbitrarily installed. The only optimization, if any, is that for the area covered by an access point. However the coverage aspect of the network design is only suitable for the initial installation phases wherein the capacity of users and the channel utilization is low. We investigate QoS parameters necessary to support voice and the implications these parameters have on WLAN design.","PeriodicalId":129008,"journal":{"name":"IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211)","volume":"81 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":"124428437","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: 25

Reducing TCP response time in face of wireless uplink losses 减少TCP响应时间面对无线上行丢失

IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211) Pub Date : 2001-10-07 DOI: 10.1109/VTC.2001.956598

Hyogon Kim, Changhoon Han, Inhye Kang

引用次数: 5

High-resolution iterative DOA algorithm for W-CDMA space-time receiver structures W-CDMA空时接收机结构的高分辨率迭代DOA算法

IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211) Pub Date : 2001-10-07 DOI: 10.1109/VTC.2001.956624

Andrew Morrison, Sharif S. Sharif

引用次数: 3

Field trial of space-time equalizer using multiple single-constrained array processors and MLSE equalizer 基于多单约束阵列处理器和MLSE均衡器的时空均衡器现场试验

IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211) Pub Date : 2001-10-07 DOI: 10.1109/VTC.2001.956653

T. Toda, Y. Aihara, Y. Kamio

{"title":"Field trial of space-time equalizer using multiple single-constrained array processors and MLSE equalizer","authors":"T. Toda, Y. Aihara, Y. Kamio","doi":"10.1109/VTC.2001.956653","DOIUrl":"https://doi.org/10.1109/VTC.2001.956653","url":null,"abstract":"The field trial of a space-time (ST) equalizer, for a high data-rate TDMA mobile communication system, is presented. A cascaded connection of a pair of single-constrained array processors and branch-metric-combining maximum-likelihood sequence-estimation (BMC-MLSE) equalizer is implemented for the ST equalizer. The pair of array processors maximizes the signal-to-interference-and-noise ratio (SINR) on both the direct and one-symbol-delayed path components and the BMC-MLSE equalizer then derives a path diversity gain from the SINR-improved path components. The radio frequency was 3.35 GHz, modulation was QPSK and the transmission rate was 4.096 Mb/s. The bit error rate (BER) performances of the ST equalizer and array processor alone were simultaneously measured in real time, along with delay profiles. The results show that the ST equalizer provide better than 10 dB of E/sub b//N/sub 0/ improvement at BER=10/sup -3/ as compared with the array processor alone in a field where the instantaneous delay spread spans less than 1 /spl mu/sec. A delayed diversity transmission (DDT) using two transmitting antennas at a mobile was also tried for the ST equalizer. 0.5-symbol DDT provided more than 1 dB E/sub b//N/sub 0/ improvement at BER=10/sup -3/ in a field where average delay spread is 0.2 /spl mu/sec.","PeriodicalId":129008,"journal":{"name":"IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211)","volume":"47 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":"116824869","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

RAKE receiver detection of adaptive modulation aided CDMA over frequency selective channels 频率选择信道上自适应调制辅助CDMA的RAKE接收机检测

IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211) Pub Date : 2001-10-07 DOI: 10.1109/VTC.2001.956480

B. Choi, L. Hanzo

引用次数: 2

A study on detection of vehicles' positions using HSV color transformed template images 基于HSV颜色变换模板图像的车辆位置检测研究

IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211) Pub Date : 2001-10-07 DOI: 10.1109/VTC.2001.956864

Hiroaki Fukui, T. Hasegawa

引用次数: 2

Hybrid SD/MRC one-shot linear decorrelating detector for asynchronous CDMA systems 用于异步CDMA系统的混合SD/MRC一次性线性去相关检测器

IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211) Pub Date : 2001-10-07 DOI: 10.1109/VTC.2001.956445

Sok-Kyu Lee, S. R. Kim

{"title":"Hybrid SD/MRC one-shot linear decorrelating detector for asynchronous CDMA systems","authors":"Sok-Kyu Lee, S. R. Kim","doi":"10.1109/VTC.2001.956445","DOIUrl":"https://doi.org/10.1109/VTC.2001.956445","url":null,"abstract":"The one-shot linear decorrelating detector (LDD) was proposed to reduce the computational complexity and delay required in the conventional LDD, but it still requires high complexity. Another one-shot LDD with low complexity was proposed. To improve its performance, this detector uses maximal ratio combining (MRC) at the two outputs of the left piece of the present bit and the right piece of the next bit in a one-shot window. In spite of the aid from MRC, the performance of the one-shot LDD with post-MRC is worse than the one-shot LDD. To overcome this problem, we propose a one-shot LDD with pre-SDC/post-MRC that employs selection diversity combining (SDC) with multiple antenna elements in front of the one-shot LDD with post-MRC. In asynchronous random CDMA systems over fading channels, the largest SNR of SDC, near-far resistance (NFR) of the one-shot LDD, and the output SNR of MRC are random variables. We derive the probability density functions (PDFs) for these random variables and calculate the bit error rate (BER) of the proposed detector using the obtained PDFs. In comparison of mathematical analysis and computer simulation results, we observe good agreement.","PeriodicalId":129008,"journal":{"name":"IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211)","volume":"144 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":"123564625","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 analysis of a joint matched filter based synchronization method for direct sequence spread spectrum radio 基于联合匹配滤波器的直接序列扩频无线电同步方法性能分析

IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211) Pub Date : 2001-10-07 DOI: 10.1109/VTC.2001.957184

C. Toker, Y. Tanik

引用次数: 0

Rerouting algorithm for non real time traffic 非实时流量的重路由算法

IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211) Pub Date : 2001-10-07 DOI: 10.1109/VTC.2001.957229

A. Guéroui, K. Boussetta, D. Gaïti

{"title":"Rerouting algorithm for non real time traffic","authors":"A. Guéroui, K. Boussetta, D. Gaïti","doi":"10.1109/VTC.2001.957229","DOIUrl":"https://doi.org/10.1109/VTC.2001.957229","url":null,"abstract":"The third generation of wireless networks will be broadband and thus will be able to support several services with different constraints on their QoS such as transit delay for time sensitive connections or cell loss probability for non real time applications. However, in such networks, the mobile may traverse several cells during the communication. Thus, if the newly visited cell does not have enough radio resources then some data may be lost or in a worst case the connection can be dropped. Since handovers are obviously critical moments then researchers have mainly investigated the bandwidth allocation problem on the radio interface and ignored the impact of mobility effects on the fixed part of the network. In this study we present a new rerouting algorithm for WATM networks called RA-NRTT, which aims to reroute non real time traffic data in the wired part of the mobile network while avoiding loops. Performance evaluation of this algorithm has been done while considering two buffer sharing strategies: complete sharing (CS) and complete partitioning (CP), and two scheduling policies; first in first out (FIFO) and weighted round robin (WRR).","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":"123952764","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

Space-time multiuser detectors for TDD-UTRA: design and optimization TDD-UTRA时空多用户探测器:设计与优化

IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211) Pub Date : 2001-10-07 DOI: 10.1109/VTC.2001.956623

M. Beretta, A. Colamonico, M. Nicoli, V. Rampa, U. Spagnolini

引用次数: 8