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VTC Spring 2009 - IEEE 69th Vehicular Technology Conference最新文献

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Achieving High-Rate Multi-Hop Data Delivery in Vehicular Networks 实现车载网络的高速率多跳数据传输
VTC Spring 2009 - IEEE 69th Vehicular Technology Conference Pub Date : 2009-09-21 DOI: 10.1109/VETECS.2009.5073357
R. Guha, Wai Chen
{"title":"Achieving High-Rate Multi-Hop Data Delivery in Vehicular Networks","authors":"R. Guha, Wai Chen","doi":"10.1109/VETECS.2009.5073357","DOIUrl":"https://doi.org/10.1109/VETECS.2009.5073357","url":null,"abstract":"A method for high rate data delivery in a multi-hop vehicular network comprises at each source vehicle, initiating a packet having a flow tag, assigning an identifier of the content and the current location to the flow tag, and forwarding the packet; at each destination vehicle, setting a flow request and broadcasting at the current intersection; further on movement, setting the flow request at the new intersection, and at each intersection, selecting a header vehicle at the intersection, computing backlog and congestion indicators and listening for broadcasts with a matrix and the flow requests at the header vehicle, determining if the matrix is present, updating the matrix in accordance with the backlog and congestion indicators if the matrix is present, initializing the matrix and estimating the delay on the outgoing road segments if the matrix is not present, forwarding the packet flow, and broadcasting the matrix from the header vehicle.","PeriodicalId":253546,"journal":{"name":"VTC Spring 2009 - IEEE 69th Vehicular Technology Conference","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114785467","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: 5
OFDM Recognition Based on Cyclostationary Analysis in an Open Spectrum Scenario 开放频谱下基于循环平稳分析的OFDM识别
VTC Spring 2009 - IEEE 69th Vehicular Technology Conference Pub Date : 2009-06-12 DOI: 10.1109/VETECS.2009.5073718
L. Bixio, G. Oliveri, M. Ottonello, C. Regazzoni
{"title":"OFDM Recognition Based on Cyclostationary Analysis in an Open Spectrum Scenario","authors":"L. Bixio, G. Oliveri, M. Ottonello, C. Regazzoni","doi":"10.1109/VETECS.2009.5073718","DOIUrl":"https://doi.org/10.1109/VETECS.2009.5073718","url":null,"abstract":"In this paper the problem of detecting the presence of similar OFDM signals, i.e. WLAN and WiMAX signals, in an Open Spectrum scenario is faced. The identification of the channel occupancy and the signal classification are performed by using a fast detector based on a single spectral correlation function estimator and a multi-class support vector machine classifier which are designed and tested in a multipath environment. Finally, the obtained numerical results and the amount of processing necessary to perform the considered operations are reported and discussed.","PeriodicalId":253546,"journal":{"name":"VTC Spring 2009 - IEEE 69th Vehicular Technology Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128436495","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: 19
Modelling Chain for Throughput Estimation in Wireless Networks 无线网络吞吐量估计的建模链
VTC Spring 2009 - IEEE 69th Vehicular Technology Conference Pub Date : 2009-06-12 DOI: 10.1109/VETECS.2009.5073685
T. Madsen, Jesper Grønbæk, J. Figueiras, H. Schwefel
{"title":"Modelling Chain for Throughput Estimation in Wireless Networks","authors":"T. Madsen, Jesper Grønbæk, J. Figueiras, H. Schwefel","doi":"10.1109/VETECS.2009.5073685","DOIUrl":"https://doi.org/10.1109/VETECS.2009.5073685","url":null,"abstract":"The motivation for our work was a feasibility study of the use of wireless technologies, more concretely IEEE 802.11, in industrial control systems. The considered application for con- figuration files upload to a system component puts requirements on the throughput of the established connection. To estimate the TCP throughput under the large range of varying conditions an analytical model has been developed. The applied approach is a feed-forward modelling chain, where the complex behavior of the communication system is split into several sub-models that are tied together by the overall model design. Defining multiple sub-models enables their individual development primarily with the purpose of complex reduction. The developed model allows to take into account a variety of parameters, such as distance between a transmitter and a receiver, channel conditions, mod- ulation schemes, in-bound interference, cross-traffic from other users etc. Analytical results are compared with the simulation results (using ns-2 simulator) and measurement results (obtained from a specially constructed test-bed).","PeriodicalId":253546,"journal":{"name":"VTC Spring 2009 - IEEE 69th Vehicular Technology Conference","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132292920","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
MIMO Spatial Mode Adaptation at the Cell Edge Using Interferer Spatial Correlation 基于干扰空间相关的MIMO空间模式在小区边缘的自适应
VTC Spring 2009 - IEEE 69th Vehicular Technology Conference Pub Date : 2009-05-12 DOI: 10.1109/VETECS.2009.5073673
R. Heath, Tao Wu, A. Soong
{"title":"MIMO Spatial Mode Adaptation at the Cell Edge Using Interferer Spatial Correlation","authors":"R. Heath, Tao Wu, A. Soong","doi":"10.1109/VETECS.2009.5073673","DOIUrl":"https://doi.org/10.1109/VETECS.2009.5073673","url":null,"abstract":"A system and method is proposed for adapting the spatial transmission strategy in a cellular MIMO (multiple input multiple output) communication system for the downlink. Spatial mode adaptation, the choice of multiplexing, transmit diversity, number of streams, space-time code family, and the like are performed slowly based on side information from other base stations. Base stations exchange their transmission plans with neighboring base stations and broadcast this information to active users. Each user measures its susceptibility to spatial interference and returns this information to the base station. The base station then schedules active users according to the decisions made in interfering base stations and the preferred transmission strategies of its own users.","PeriodicalId":253546,"journal":{"name":"VTC Spring 2009 - IEEE 69th Vehicular Technology Conference","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124946154","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
Multi-Hop-Aware Cooperative Relaying 多跳感知协同中继
VTC Spring 2009 - IEEE 69th Vehicular Technology Conference Pub Date : 2009-04-26 DOI: 10.1109/VETECS.2009.5073700
Helmut Adam, C. Bettstetter, S. Senouci
{"title":"Multi-Hop-Aware Cooperative Relaying","authors":"Helmut Adam, C. Bettstetter, S. Senouci","doi":"10.1109/VETECS.2009.5073700","DOIUrl":"https://doi.org/10.1109/VETECS.2009.5073700","url":null,"abstract":"We address the drawbacks of Cooperative Relaying regarding its spectral inefficiency and its channel over reservation compared to direct transmissions. We propose to exploit routing information in cooperative relaying to reduce these disadvan- tages. In this paper we present a complete system design of Multi-Hop-Aware Cooperative Relaying and investigate different relay selection policies for it. Performance tests indicate that it significantly outperforms hop-by-hop cooperative relaying in terms of throughput. Index Terms—cooperative diversity, cooperative relaying, relay selection, D-STBC, routing","PeriodicalId":253546,"journal":{"name":"VTC Spring 2009 - IEEE 69th Vehicular Technology Conference","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123067367","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: 17
Modified Iterative Two-Stage Hybrid Decoding Algorithm for Low-Density Parity-Check (LDPC) Codes 低密度奇偶校验码的改进迭代两阶段混合译码算法
VTC Spring 2009 - IEEE 69th Vehicular Technology Conference Pub Date : 2009-04-26 DOI: 10.1109/VETECS.2009.5073688
H. R. Zeidan, M. Elsabrouty
{"title":"Modified Iterative Two-Stage Hybrid Decoding Algorithm for Low-Density Parity-Check (LDPC) Codes","authors":"H. R. Zeidan, M. Elsabrouty","doi":"10.1109/VETECS.2009.5073688","DOIUrl":"https://doi.org/10.1109/VETECS.2009.5073688","url":null,"abstract":"This paper considers a modified iterative version of the two-stage hybrid algorithm for decoding low-density parity- check (LDPC) codes. The hybrid-decision scheme is a decoding scheme used that combines two iterative decoding algorithms for decoding LDPC codes. This scheme is suitable for many applications such as audio and video transmission that are sensitive to time. The hybrid-decision scheme mixes between the characteristics of the soft-decision decoding scheme and the hard- decision decoding scheme to reduce the computational complexity of the whole decoding algorithm. The modification proposed in this paper is applied to the implementation-efficient reliability ratio weighted bit-flipping (IERRWBF) algorithm which represents hard-decision scheme in the hybrid algorithm. This modification is capable of achieving better performance than that of the hybrid decoding algorithm with reducing the number of iterations required at each SNR and approaching more to the performance of the SPA. This reduction is more observable as the maximum number of iterations assigned for the algorithm increases or as the code length increases with improving the error performance as proved by simulation results.","PeriodicalId":253546,"journal":{"name":"VTC Spring 2009 - IEEE 69th Vehicular Technology Conference","volume":"218 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116636907","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
Distributed and Centralized Architectures for Relay-Aided Cellular Systems 中继辅助蜂窝系统的分布式和集中式体系结构
VTC Spring 2009 - IEEE 69th Vehicular Technology Conference Pub Date : 2009-04-26 DOI: 10.1109/VETECS.2009.5073499
E. Yilmaz, F. Boccardi, A. Alexiou
{"title":"Distributed and Centralized Architectures for Relay-Aided Cellular Systems","authors":"E. Yilmaz, F. Boccardi, A. Alexiou","doi":"10.1109/VETECS.2009.5073499","DOIUrl":"https://doi.org/10.1109/VETECS.2009.5073499","url":null,"abstract":"In this paper we propose a two-step distributed scheduling algorithm for relay-assisted cellular networks where a given user can be either served by the base station or by a relay, in a opportunistic way. Such a distributed approach allows a reduced feedback signaling with respect to the centralized case, especially when a simple scalar feedback is not sufficient for estimating the channel quality. As a result of the reduced feedback signaling requirements the system becomes more scalable, as new relays can be deployed where required without need of a careful network planning. We study the effectiveness of the proposal by means of a multicell simulator.","PeriodicalId":253546,"journal":{"name":"VTC Spring 2009 - IEEE 69th Vehicular Technology Conference","volume":"29 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120931619","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: 9
Cooperative Multi-Antenna Relaying in Heterogeneous Networks 异构网络中的协同多天线中继
VTC Spring 2009 - IEEE 69th Vehicular Technology Conference Pub Date : 2009-04-26 DOI: 10.1109/VETECS.2009.5073466
Qianqian Zhang, Wenbo Wang, Wei Huang, Jie Zhang
{"title":"Cooperative Multi-Antenna Relaying in Heterogeneous Networks","authors":"Qianqian Zhang, Wenbo Wang, Wei Huang, Jie Zhang","doi":"10.1109/VETECS.2009.5073466","DOIUrl":"https://doi.org/10.1109/VETECS.2009.5073466","url":null,"abstract":"In this paper, we investigate the performance of heterogeneous networks with multi-antenna cooperative relays. Specifically, threshold-based maximum ratio combining (MRC) and selection combining (SC) schemes are adopted for decoding at the relays and the end-to-end (E2E) error rate performance is analyzed by assuming a Nakagami channel model. Numerical results show that the deployment of multi-antennas can reduce the number of required relay nodes, and thus significantly reduce the system cost. On the other hand, the selection of optimal decoding threshold depends on the number of relay nodes, number of antennas, as well as the average SNR value at the receiver. It is also demonstrated that when the BER requirement is not high, the SC relaying scheme is sufficient to provide satisfactory performance, such that the complexity of relays can be effectively reduced.","PeriodicalId":253546,"journal":{"name":"VTC Spring 2009 - IEEE 69th Vehicular Technology Conference","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124732566","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 Novel Approach to Indoor RSSI Localization by Automatic Calibration of the Wireless Propagation Model 一种基于无线传播模型自动标定的室内RSSI定位新方法
VTC Spring 2009 - IEEE 69th Vehicular Technology Conference Pub Date : 2009-04-26 DOI: 10.1109/VETECS.2009.5073315
P. Barsocchi, Stefano Lenzi, S. Chessa, G. Giunta
{"title":"A Novel Approach to Indoor RSSI Localization by Automatic Calibration of the Wireless Propagation Model","authors":"P. Barsocchi, Stefano Lenzi, S. Chessa, G. Giunta","doi":"10.1109/VETECS.2009.5073315","DOIUrl":"https://doi.org/10.1109/VETECS.2009.5073315","url":null,"abstract":"We propose a novel localization algorithm of mobile sensors based on wireless sensor networks providing RSSI measurements between the mobile and the fixed sensors (anchors) in the network. The algorithm selects and weights the RSSI measurements according to their strength, and it uses a propagation model to transform RSSI measurements into distances, in order to estimate the position of the mobile. The algorithm also uses a virtual calibration method of the propagation model that does not require human intervention. By an experimental setup we show that the localization algorithm increases the performance with respect to the commonly used least mean square algorithm showing also how to achieve a wished accuracy increasing the anchor density.","PeriodicalId":253546,"journal":{"name":"VTC Spring 2009 - IEEE 69th Vehicular Technology Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125826115","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: 147
Bit Error Rate Analysis in MIMO Channels with Fading and Interference 具有衰落和干扰的MIMO信道误码率分析
VTC Spring 2009 - IEEE 69th Vehicular Technology Conference Pub Date : 2009-04-26 DOI: 10.1109/VETECS.2009.5073424
J. M. Romero-Jerez, J. P. Peña-Martín, A. Goldsmith
{"title":"Bit Error Rate Analysis in MIMO Channels with Fading and Interference","authors":"J. M. Romero-Jerez, J. P. Peña-Martín, A. Goldsmith","doi":"10.1109/VETECS.2009.5073424","DOIUrl":"https://doi.org/10.1109/VETECS.2009.5073424","url":null,"abstract":"This work explores the average bit error rate (BER) of uncoded MIMO systems in Rayleigh fading channels with co-channel interference (CCI) and background noise. We consider that maximal ratio transmission (MRT) is used at the transmit end. At the receiver we consider two different schemes: maximal ratio combining (MRC) and interference cancellation (IC) via null steering of the receive array radiation pattern. We provide analytical expressions of the BER for different modulation techniques and provide a comparison between the two proposed receiver schemes.","PeriodicalId":253546,"journal":{"name":"VTC Spring 2009 - IEEE 69th Vehicular Technology Conference","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126037326","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
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