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

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A Novel Multi-Layer Cooperative Decode and Forward Scheme 一种新的多层协同译码转发方案
VTC Spring 2009 - IEEE 69th Vehicular Technology Conference Pub Date : 2009-04-26 DOI: 10.1109/VETECS.2009.5073321
R. Hoshyar, F. Héliot, R. Tafazolli
{"title":"A Novel Multi-Layer Cooperative Decode and Forward Scheme","authors":"R. Hoshyar, F. Héliot, R. Tafazolli","doi":"10.1109/VETECS.2009.5073321","DOIUrl":"https://doi.org/10.1109/VETECS.2009.5073321","url":null,"abstract":"Decode-and-forward (DF) is one of the most popular approach to transmit information over a cooperative relay channel. In DF, information coming from different sources is simply combined regardless of their respective link qualities, and thus DF is not optimized for any propagation conditions. In this paper, we propose a novel transmit cooperation scheme that exploits asymmetric link qualities by using layered higher order modulation. A partial forwarding approach is followed by taking advantage of the layered structure: one part of the information is forwarded by a relay for increasing the robustness of the direct link and the rest of the information flows through the boosted direct link. Moreover, our scheme is based on a distributed serially concatenated encoding structure that can accommodate iterative decoding to further improve its performance. The complexity of our scheme is seemingly identical to DF scheme. Performance evaluation shows that our scheme provides a better spectral efficiency in asymmetric propagation conditions than DF scheme for both non-iterative and iterative decoding.","PeriodicalId":253546,"journal":{"name":"VTC Spring 2009 - IEEE 69th Vehicular Technology Conference","volume":"21 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":"125563182","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
Investigation on Optimum Radio Parameter Design in Layered OFDMA for LTE-Advanced LTE-Advanced分层OFDMA无线参数优化设计研究
VTC Spring 2009 - IEEE 69th Vehicular Technology Conference Pub Date : 2009-04-26 DOI: 10.1109/VETECS.2009.5073618
K. Takeda, Satoshi Nagata, Y. Kishiyama, M. Tanno, K. Higuchi, M. Sawahashi
{"title":"Investigation on Optimum Radio Parameter Design in Layered OFDMA for LTE-Advanced","authors":"K. Takeda, Satoshi Nagata, Y. Kishiyama, M. Tanno, K. Higuchi, M. Sawahashi","doi":"10.1109/VETECS.2009.5073618","DOIUrl":"https://doi.org/10.1109/VETECS.2009.5073618","url":null,"abstract":"This paper investigates the optimum radio parameters, i.e., numerology, in layered orthogonal frequency division multiple access (OFDMA) for long-term evolution (LTE)- Advanced. Similar to the layered OFDMA concept, it was agreed at the 3GPP RAN WG1 meeting that the entire transmission bandwidth in LTE-advanced should comprise multiple frequency blocks called component carriers to achieve a wider system bandwidth than that for the current LTE (Rel-8 LTE). We investigate the optimum radio parameters in the frequency domain including the need for an inter-component carrier guard band (GB). In the simulation evaluations, we set the parameters for the receiver filter assuming the worst case that satisfies the minimum requirement specified in Rel-8 LTE. Simulation results show that the loss in the average received signal energy per symbol-to-noise power spectrum density ratio (Es/No) satisfying the required block error rate compared to the case without an inter-component carrier GB is negligible irrespective of the modulation scheme and coding rate. As a result, we conclude that the inter-component carrier GB is unnecessary and can be minimized to 19 subcarriers in the downlink while retaining the same number of subcarriers within a component carrier as that for Rel-8 LTE.","PeriodicalId":253546,"journal":{"name":"VTC Spring 2009 - IEEE 69th Vehicular Technology Conference","volume":"19 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":"115207534","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
Virtualization of the Wireless Medium: A Simulation-Based Study 无线媒体的虚拟化:基于仿真的研究
VTC Spring 2009 - IEEE 69th Vehicular Technology Conference Pub Date : 2009-04-26 DOI: 10.1109/VETECS.2009.5073908
S. Pérez, José María Cabero, Eder Miguel
{"title":"Virtualization of the Wireless Medium: A Simulation-Based Study","authors":"S. Pérez, José María Cabero, Eder Miguel","doi":"10.1109/VETECS.2009.5073908","DOIUrl":"https://doi.org/10.1109/VETECS.2009.5073908","url":null,"abstract":"This work considers virtualization of the wireless medium as a mean to share common network physical infrastructure by different Virtual Operators (VO) based on a Time Division Multiple Access (TDMA) virtualization technique. We have developed a Wireless Medium Virtualization Framework (WMVF) to analyze the performance of a variable number of VOs (with one or more types of traffic) accessing to the same wireless medium through the same wireless node in a coordinated way. Extensive simulations have been carried out to assess the impact of wireless medium virtualization based on relevant parameters such as the type of traffic, the number of VOs and the specific wireless technology. Delay, jitter and the utilization of the network are the metrics used in this paper to show the potential and limitations of wireless virtualization as a way to increase network usage. This work has been carried out partially inside the European Project 4WARD (FP7 Project reference: 216041).","PeriodicalId":253546,"journal":{"name":"VTC Spring 2009 - IEEE 69th Vehicular Technology Conference","volume":"8 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":"115342870","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: 26
Coordinated Beamforming with Limited BS Cooperation for Multicell Multiuser MIMO Broadcast Channel 基于有限BS合作的多小区多用户MIMO广播信道协调波束形成
VTC Spring 2009 - IEEE 69th Vehicular Technology Conference Pub Date : 2009-04-26 DOI: 10.1109/VETECS.2009.5073473
Kyung-Hoe Kim, Jong-Ho Lee, Chang-Hoon Lee, N. Jeon, Seong-Cheol Kim
{"title":"Coordinated Beamforming with Limited BS Cooperation for Multicell Multiuser MIMO Broadcast Channel","authors":"Kyung-Hoe Kim, Jong-Ho Lee, Chang-Hoon Lee, N. Jeon, Seong-Cheol Kim","doi":"10.1109/VETECS.2009.5073473","DOIUrl":"https://doi.org/10.1109/VETECS.2009.5073473","url":null,"abstract":"The capacity of downlink multi-input multi-output (MIMO) systems is significantly limited by inter-cell co-channel interference (CCI). Improving the performance of cell edge users who suffers strong inter-cell CCI is still a crucial issue. In this paper, coordinated beamforming (CBF) algorithm for multicell multiuser MIMO system is proposed to cope with the presence of intel-cell CCI. In multicell environment with MIMO channel, limited base station (BS) cooperation is considered to design optimal transmit and receive beamformers which make interference-free at the receiver. Simulation results show that the proposed algorithms can improve the capacity of cell edge user effectively as well as the overall system capacity for multiuser multicell MIMO system.","PeriodicalId":253546,"journal":{"name":"VTC Spring 2009 - IEEE 69th Vehicular Technology Conference","volume":"140 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":"115530242","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: 15
Coded Closed-Loop Power Control over Wireless Channels 无线信道的编码闭环功率控制
VTC Spring 2009 - IEEE 69th Vehicular Technology Conference Pub Date : 2009-04-26 DOI: 10.1109/VETECS.2009.5073446
S. Choe
{"title":"Coded Closed-Loop Power Control over Wireless Channels","authors":"S. Choe","doi":"10.1109/VETECS.2009.5073446","DOIUrl":"https://doi.org/10.1109/VETECS.2009.5073446","url":null,"abstract":"We present a coded closed-loop power control scheme with power control command bit error protection for delay-prone burst transmission systems.","PeriodicalId":253546,"journal":{"name":"VTC Spring 2009 - IEEE 69th Vehicular Technology Conference","volume":"27 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":"122351635","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
Cooperative Communication Using Bit-Selective Adaptive Demodulation and Raptor Codes: The Gaussian Relay Channel Case 基于位选择自适应解调和猛禽码的协同通信:高斯中继信道案例
VTC Spring 2009 - IEEE 69th Vehicular Technology Conference Pub Date : 2009-04-26 DOI: 10.1109/VETECS.2009.5073464
K. Illanko, A. Anpalagan
{"title":"Cooperative Communication Using Bit-Selective Adaptive Demodulation and Raptor Codes: The Gaussian Relay Channel Case","authors":"K. Illanko, A. Anpalagan","doi":"10.1109/VETECS.2009.5073464","DOIUrl":"https://doi.org/10.1109/VETECS.2009.5073464","url":null,"abstract":"In this paper, we propose a cooperative communication system where every link adapts to the channel condition without any feedback, by using a recently proposed adaptive demodulation (ADM) scheme. In ADM, the receiver demodulates only a subset of the bits from a Raptor coded Gray mapped M-QAM received symbol, where the number of demodulated bits depends on the channel condition. The ADM scheme, which was originally proposed for point to point communication, determines the most reliable bits using approximate decision regions obtained through a binary composite hypothesis test in the AWGN environment. In contrast, we prove a simple theorem that identifies the most reliable bits in a Gray mapped M-QAM received symbol in a straight forward and exact manner, and use it in every receiver of our cooperative communication system to adaptively extract the appropriate bits. Performance results demonstrate that our ADM based Raptor coded cooperative communication system is robust enough to realize diversity order of two, even under adverse channel conditions in various links.","PeriodicalId":253546,"journal":{"name":"VTC Spring 2009 - IEEE 69th Vehicular Technology Conference","volume":"263 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":"122534994","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
A Game-Theoretic Approach to Prioritized Transmission in Wireless CSMA/CA Networks 无线CSMA/CA网络优先传输的博弈论方法
VTC Spring 2009 - IEEE 69th Vehicular Technology Conference Pub Date : 2009-04-26 DOI: 10.1109/VETECS.2009.5073294
L. Galluccio
{"title":"A Game-Theoretic Approach to Prioritized Transmission in Wireless CSMA/CA Networks","authors":"L. Galluccio","doi":"10.1109/VETECS.2009.5073294","DOIUrl":"https://doi.org/10.1109/VETECS.2009.5073294","url":null,"abstract":"Support of traffic with QoS requirements in wireless scenarios is a challenging topic and methodologies for supporting different traffic priorities have recently emerged. Unfortunately in wireless scenarios, it is well known that contention problems are met. The latter can be modeled as a game. Accordingly, in this paper we present a game-theoretic model of priori- tized data transmission in CSMA/CA networks where nodes are considered as potential cheaters which should be punished through a jamming mechanism when misbehaving and trying to monopolize wireless resources. Then, we also describe the distributed algorithm to be performed by network nodes to implement the model and assess the validity of both the model and the algorithm through simulations. Index Terms: Wireless networks, QoS, game-theory, algorithms, simulation. I. I NTRODUCTION","PeriodicalId":253546,"journal":{"name":"VTC Spring 2009 - IEEE 69th Vehicular Technology Conference","volume":"124 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":"122562740","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: 13
Full-Rate Differential Spatial Multiplexing from Orthogonal Designs 正交设计的全速率差分空间复用
VTC Spring 2009 - IEEE 69th Vehicular Technology Conference Pub Date : 2009-04-26 DOI: 10.1109/VETECS.2009.5073568
Yuan-ce Deng, A. Burr, Danshan Chen
{"title":"Full-Rate Differential Spatial Multiplexing from Orthogonal Designs","authors":"Yuan-ce Deng, A. Burr, Danshan Chen","doi":"10.1109/VETECS.2009.5073568","DOIUrl":"https://doi.org/10.1109/VETECS.2009.5073568","url":null,"abstract":"In earlier paper we proposed a differential spatial multiplexing (SM) scheme based on complex square orthogonal designs, referred to as differential orthogonal spatial multiplexing (DOSM). The receiver of DOSM does not require estimation of channel fading coefficients, channel power, signal power, or noise power to decode the data symbols and the decision is based on the two consecutively received codewords. In, the transmission matrix of DOSM is based on complex square orthogonal designs which cannot achieve full data rate. Hence, we presented a constellation rotation strategy to enhance the rate of DOSM. In this paper, we construct the transmission matrix of DOSM from complex rectangular orthogonal designs and find that full-rate DOSM can be achieved with increased encoding block length. An upper bound of the pair-wise error probability (PEP) for DOSM in Rayleigh fading channels is derived. Simulation results show that the proposed DOSM outperforms the differential space-time block code (DSTBC) with full diversity and the existing differential SM schemes in terms of error-rate performance over quasi-static Rayleigh fading channels.","PeriodicalId":253546,"journal":{"name":"VTC Spring 2009 - IEEE 69th Vehicular Technology Conference","volume":"35 11","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114129844","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
Secure Physical Layer using Dynamic Permutations in Cognitive OFDMA Systems 认知OFDMA系统中使用动态排列的安全物理层
VTC Spring 2009 - IEEE 69th Vehicular Technology Conference Pub Date : 2009-04-26 DOI: 10.1109/VETECS.2009.5073843
Filippo Meucci, S. Wardana, N. Prasad
{"title":"Secure Physical Layer using Dynamic Permutations in Cognitive OFDMA Systems","authors":"Filippo Meucci, S. Wardana, N. Prasad","doi":"10.1109/VETECS.2009.5073843","DOIUrl":"https://doi.org/10.1109/VETECS.2009.5073843","url":null,"abstract":"This paper proposes a novel lightweight mechanism for a secure physical (PHY) layer in cognitive radio network (CRN) using orthogonal frequency division multiplexing (OFDM). User's data symbols are mapped over the physical subcarriers with a permutation formula. The PHY layer is secured with a random and dynamic subcarrier permutation which is based on a single pre-shared information and depends on dynamic spectrum access (DSA). The dynamic subcarrier permutation is varying over time, geographical location and environment status, resulting in a very robust protection that ensures confidentiality. The method is shown to be effective also for existing non-cognitive systems. The proposed mechanism is effective against eavesdropping even if the eavesdropper adopts a long-time patterns analysis, thus protecting cryptography techniques of higher layers. The correlation properties of the permutations are analyzed for several DSA patterns. Simulations are performed according to the parameters of the IEEE 802.16e system model. The securing mechanism proposed provides intrinsic PHY layer security and it can be easily implemented in the current IEEE 802.16 standard applying almost negligible modifications.","PeriodicalId":253546,"journal":{"name":"VTC Spring 2009 - IEEE 69th Vehicular Technology Conference","volume":"30 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":"114387939","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: 11
Results from a First Approach to a Point-Scatter Simulator for MIMO Radio Channel Modeling MIMO无线信道建模的点散射模拟器的第一种方法的结果
VTC Spring 2009 - IEEE 69th Vehicular Technology Conference Pub Date : 2009-04-26 DOI: 10.1109/VETECS.2009.5073836
S. Mota, N. Almeida, A. Rocha, F. Pérez-Fontán
{"title":"Results from a First Approach to a Point-Scatter Simulator for MIMO Radio Channel Modeling","authors":"S. Mota, N. Almeida, A. Rocha, F. Pérez-Fontán","doi":"10.1109/VETECS.2009.5073836","DOIUrl":"https://doi.org/10.1109/VETECS.2009.5073836","url":null,"abstract":"This paper presents some results obtained from a first approach to a point-scatter simulator for multiple-input multiple-output (MIMO) radio channel modeling. Specifically, we present the comparison of capacity obtained using the point- scatter simulator with that obtained with the Kronecker model. Capacity results obtained from measured propagation data are also presented. Ideas to enhance the simulator, which include the development of a statistical-based generative channel model for MIMO systems, are discussed.","PeriodicalId":253546,"journal":{"name":"VTC Spring 2009 - IEEE 69th Vehicular Technology Conference","volume":"80 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":"121921314","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
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