2007 IEEE 66th Vehicular Technology Conference最新文献_第4页

Performance Evaluation of A Multiuser Detection Based MAC Design for Ad Hoc Networks 基于多用户检测的Ad Hoc网络MAC设计性能评估

2007 IEEE 66th Vehicular Technology Conference Pub Date : 2007-10-15 DOI: 10.1109/VETECF.2007.75

Jinfang Zhang, Z. Dziong, F. Gagnon, M. Kadoch

引用次数: 8

Iterative Demodulation and Decoding for Rotated MPSK Constellations with Convolutional Coding and Signal Space Diversity 基于卷积编码和信号空间分集的旋转MPSK星座迭代解调和解码

2007 IEEE 66th Vehicular Technology Conference Pub Date : 2007-10-15 DOI: 10.1109/VETECF.2007.362

N. Kiyani, J. Weber

引用次数: 18

Ultrawideband Parallel Strip Antennas Designed by Genetic Algorithms 基于遗传算法的超宽带平行条形天线设计

2007 IEEE 66th Vehicular Technology Conference Pub Date : 2007-10-15 DOI: 10.1109/VETECF.2007.430

P. L. Carro, J. D. Mingo

引用次数: 2

Performance Evaluation of the IEEE 802.11p WAVE Communication Standard IEEE 802.11p WAVE通信标准的性能评估

2007 IEEE 66th Vehicular Technology Conference Pub Date : 2007-10-15 DOI: 10.1109/VETECF.2007.461

S. Eichler

引用次数: 659

Experimental Verification on the Prediction of the Trend in Radio Resource Availability in Cognitive Radio 认知无线电中无线电资源可用性趋势预测的实验验证

2007 IEEE 66th Vehicular Technology Conference Pub Date : 2007-10-15 DOI: 10.1109/VETECF.2007.333

S. Kaneko, S. Nomoto, T. Ueda, S. Nomura, Kazunori Takeuchi, K. Sugiyama

引用次数: 9

Estimation of Uplink WCDMA Load in a Single RBS 单RBS下WCDMA上行链路负载估计

2007 IEEE 66th Vehicular Technology Conference Pub Date : 2007-10-15 DOI: 10.1109/VETECF.2007.319

T. Wigren, Per Hellqvist

引用次数: 5

An Intra-Cell Frequency Reuse Plan for Triangular Cell Communication System 三角小区通信系统的小区内频率复用方案

2007 IEEE 66th Vehicular Technology Conference Pub Date : 2007-10-15 DOI: 10.1109/VETECF.2007.340

Xingzai Lv, Zhen Wang, Jin-kang Zhu

引用次数: 3

EXIT Chart Analysis of Low-Complexity Bayesian Turbo Multiuser Detection for Rank-Deficient Multiple Antenna Aided OFDM 缺秩多天线辅助OFDM低复杂度贝叶斯Turbo多用户检测的出口图分析

2007 IEEE 66th Vehicular Technology Conference Pub Date : 2007-10-15 DOI: 10.1109/VETECF.2007.131

Lei Xu, Sheng Chen, L. Hanzo

{"title":"EXIT Chart Analysis of Low-Complexity Bayesian Turbo Multiuser Detection for Rank-Deficient Multiple Antenna Aided OFDM","authors":"Lei Xu, Sheng Chen, L. Hanzo","doi":"10.1109/VETECF.2007.131","DOIUrl":"https://doi.org/10.1109/VETECF.2007.131","url":null,"abstract":"This paper studies the mutual information transfer characteristics of a novel low-complexity Bayesian Multiuser Detector (MUD) proposed for employment in Space Division Multiple Access (SDMA) aided Orthogonal Frequency Division Multiplexing (OFDM) systems. The design of the Bayesian MUD advocated is based on extending the optimum single-user Bayesian design to multiuser OFDM signals modeled by a Gaussian mixture, rather than by a single Gaussian distribution, when characterizing the conditional PDF of the received signal. In order to reduce the complexity of the Bayesian MUD, we introduce an a priori information threshold and then discard the low- probability terms during the calculation of the extrinsic information generated . The achievable complexity reduction as a function of different threshold values is analyzed and the best tradeoff values are derived with the aid of simulation. Both non-systematic and recursive systematic convolutional codes are used for exchanging extrinsic information with the MUD for the sake of achieving a turbo-detection aided iteration gain. The convergence behavior of the proposed low-complexity Bayesian turbo MUD is investigated using Extrinsic Information Transfer (EXIT) chart analysis and compared to that of Soft Interference Cancellation aided Minimum Mean Square Error (SIC-MMSE) MUD schemes. As expected, the simulation results show that the proposed low-complexity Bayesian Turbo MUD outperforms the SIC-MMSE MUDs. A substantial benefit of the proposed MUD is that it is potentially capable of supporting up to three times higher number of users than the number of receiver antennas. In this challenging multiuser scenario, the resultant channel- matrix becomes rank-deficient, resulting in a linearly non-separable detector output phasor constellation, when classic linear receivers tend to exhibit a poor performance.","PeriodicalId":261917,"journal":{"name":"2007 IEEE 66th Vehicular Technology Conference","volume":"113 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124148284","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

Distributed and Centralized Mobility-Aware Caching Schemes for Collaborative Service Provision in User-Deployed Networks 用户部署网络中协同服务提供的分布式和集中式移动性感知缓存方案

2007 IEEE 66th Vehicular Technology Conference Pub Date : 2007-10-15 DOI: 10.1109/VETECF.2007.78

P. Lungaro

{"title":"Distributed and Centralized Mobility-Aware Caching Schemes for Collaborative Service Provision in User-Deployed Networks","authors":"P. Lungaro","doi":"10.1109/VETECF.2007.78","DOIUrl":"https://doi.org/10.1109/VETECF.2007.78","url":null,"abstract":"Opening up to public access, a collection of user- deployed APs has the potential to reduce service costs and improve user service perception, especially for delay tolerant services. However, since the individual APs composing such a network are typically owned and operated by different users, the achievable performances are likely to be limited by the lack of coordination. By adopting an Inter AP communication Protocol (IAPP) that allows APs to collaborate in exchanging messages about the information requested by potentially incoming users, the APs are capable to start caching information, even before the users reach their communication ranges. In a multi-user scenario, in which the backbone capacity limits the performances of the APs, a set of distributed backbone resource management schemes, differing in their degrees of collaboration between APs and their mobility-awareness, are proposed and evaluated in respect to both a centralized caching server solution and a non cooperative scheme. The results show that, at the cost of increased memory requirements, collaborative caching brings significant improvements to both backbone capacity utilization and average user rates, as compared to the non cooperating scheme. At the same time, we show that for a centralized server solution to outperform our collaborative caching scheme, the central server needs to have a backbone capacity comparable to sum of the capacities of the individual APs deployed in the service area.","PeriodicalId":261917,"journal":{"name":"2007 IEEE 66th Vehicular Technology Conference","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124149194","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

A Frequency-Domain Equalization Architecture for Space-Time Block Coded MIMO-CDMA Systems 空时分组编码MIMO-CDMA系统的频域均衡结构

2007 IEEE 66th Vehicular Technology Conference Pub Date : 2007-10-15 DOI: 10.1109/VETECF.2007.165

Zhifeng Ruan, Qixing Wang, Baojin Li, Yongyu Chang, Dacheng Yang

引用次数: 0