2012 IEEE Wireless Communications and Networking Conference (WCNC)最新文献_第10页

Measuring and modeling mobile phone charger energy consumption and environmental impact 测量和模拟手机充电器的能耗和环境影响

2012 IEEE Wireless Communications and Networking Conference (WCNC) Pub Date : 2012-04-01 DOI: 10.1109/WCNC.2012.6214357

Mikko V. J. Heikkinen, J. Nurminen

引用次数: 3

Performance evaluation of TCP in IEEE 802.16 networks IEEE 802.16网络中TCP的性能评估

2012 IEEE Wireless Communications and Networking Conference (WCNC) Pub Date : 2012-04-01 DOI: 10.1109/WCNC.2012.6214309

Konstantinos G. Tsiknas, G. Stamatelos

引用次数: 12

Self-interference aware MIMO filter design for non-regenerative multi-pair two-way relaying 非再生多对双向继电器自干扰感知MIMO滤波器设计

2012 IEEE Wireless Communications and Networking Conference (WCNC) Pub Date : 2012-04-01 DOI: 10.1109/WCNC.2012.6214264

Holger Degenhardt, A. Klein

引用次数: 20

Enhanced MIMO subspace detection with interference cancellation 具有干扰抵消的增强MIMO子空间检测

2012 IEEE Wireless Communications and Networking Conference (WCNC) Pub Date : 2012-04-01 DOI: 10.1109/WCNC.2012.6214254

Yejian Chen, S. Brink

引用次数: 6

Spectrum sharing optimization model for multiuser linear-precoded OFDM UWB systems 多用户线性预编码OFDM UWB系统频谱共享优化模型

2012 IEEE Wireless Communications and Networking Conference (WCNC) Pub Date : 2012-04-01 DOI: 10.1109/WCNC.2012.6214012

Ayman Khalil, M. Crussiére, J. Hélard

引用次数: 0

Pilot-based ML estimation in Amplify-and-Forward cooperative networks 放大转发合作网络中基于pilot的机器学习估计

2012 IEEE Wireless Communications and Networking Conference (WCNC) Pub Date : 2012-04-01 DOI: 10.1109/WCNC.2012.6213928

Nico Aerts, M. Moeneclaey

引用次数: 4

Quarter-Sphere SVM: Attribute and Spatio-Temporal correlations based Outlier & Event Detection in wireless sensor networks 四分之一球面支持向量机:基于属性和时空相关性的无线传感器网络异常点和事件检测

2012 IEEE Wireless Communications and Networking Conference (WCNC) Pub Date : 2012-04-01 DOI: 10.1109/WCNC.2012.6214127

N. Shahid, I. Naqvi, Saad B. Qaisar

{"title":"Quarter-Sphere SVM: Attribute and Spatio-Temporal correlations based Outlier & Event Detection in wireless sensor networks","authors":"N. Shahid, I. Naqvi, Saad B. Qaisar","doi":"10.1109/WCNC.2012.6214127","DOIUrl":"https://doi.org/10.1109/WCNC.2012.6214127","url":null,"abstract":"Support-Vector Machines (SVM) have received a great interest in the machine learning community since their introduction, especially in Outlier Detection in Wireless Sensor Networks (WSN). The Quarter-Sphere formulation of One-Class SVM (QS-SVM), extends the main SVM ideas from supervised to unsupervised learning algorithms. The QS-SVM formulation is based only on Spatio-Temporal correlations between the sensor nodes (hence the name Spatio-Temporal Quarter-Sphere SVM, ST-QS-SVM). Thus, it has a non-ideal performance. This work presents a new One-Class Quarter-Sphere SVM formulation based on the novel concept of Attribute Correlations between the sensor nodes, hence the name, Spatio-Temporal-Attribute Quarter-sphere SVM (STA-QS-SVM) formulation. Online and partially online approaches to Outlier Detection in WSNs have been presented using this formulation. The results indicate a significant increase in the Outlier Detection rates and a remarkable reduction in the False Positive rates over the previous formulation (ST-QS-SVM). The results of this novel technique also suggest that the partially online approach is as efficient as the online approach, thereby conserving significant computational and communication complexity. Moreover very high Event Detection rates have been reported for STA-QS-SVM, which have not been reported by ST-QS-SVM.","PeriodicalId":329194,"journal":{"name":"2012 IEEE Wireless Communications and Networking Conference (WCNC)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124369307","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: 46

Joint uplink power and subchannel allocation in cognitive radio network 认知无线网络中上行功率与子信道的联合分配

2012 IEEE Wireless Communications and Networking Conference (WCNC) Pub Date : 2012-04-01 DOI: 10.1109/WCNC.2012.6214332

Jie Zhang, Tiejun Lv, Hui Gao, Yueming Lu

引用次数: 12

A robust congestion control scheme for fast and reliable dissemination of safety messages in VANETs 一个健壮的拥塞控制方案，用于在vanet中快速可靠地传播安全信息

2012 IEEE Wireless Communications and Networking Conference (WCNC) Pub Date : 2012-04-01 DOI: 10.1109/WCNC.2012.6214170

S. Djahel, Y. Ghamri-Doudane

{"title":"A robust congestion control scheme for fast and reliable dissemination of safety messages in VANETs","authors":"S. Djahel, Y. Ghamri-Doudane","doi":"10.1109/WCNC.2012.6214170","DOIUrl":"https://doi.org/10.1109/WCNC.2012.6214170","url":null,"abstract":"In this paper, we address the beacon congestion issue in Vehicular Ad Hoc Networks (VANETs) due to its devastating impact on the performance of ITS applications. The periodic beacon broadcast may consume a large part of the available bandwidth leading to an increasing number of collisions among MAC frames, especially in case of high vehicular density. This will severely affect the performance of the Intelligent Transportation Systems (ITS) safety based applications that require timely and reliable dissemination of the event-driven warning messages. To deal with this problem, we propose an original solution that consists of three phases as follows; priority assignment to the messages to be transmitted /forwarded according to two different metrics, congestion detection phase, and finally transmit power and beacon transmission rate adjustment to facilitate emergency messages spread within VANETs. Our solution outperforms the existing works since it doesn't alter the performance of the running ITS applications unless a VANET congestion state is detected. Moreover, it ensures that the most critical and nearest dangers are advertised prior to the farther and less damaging events. The simulation results show promising results and validate our solution.","PeriodicalId":329194,"journal":{"name":"2012 IEEE Wireless Communications and Networking Conference (WCNC)","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134311382","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: 75

Robust MMSE transceiver design in amplify-and-forward MIMO relay system with Tomlinson-Harashima source precoding 基于Tomlinson-Harashima源预编码的放大转发MIMO中继系统中稳健的MMSE收发器设计

2012 IEEE Wireless Communications and Networking Conference (WCNC) Pub Date : 2012-04-01 DOI: 10.1109/WCNC.2012.6214470

F. Tseng, Min-Yao Chang, Wen-Rong Wu

{"title":"Robust MMSE transceiver design in amplify-and-forward MIMO relay system with Tomlinson-Harashima source precoding","authors":"F. Tseng, Min-Yao Chang, Wen-Rong Wu","doi":"10.1109/WCNC.2012.6214470","DOIUrl":"https://doi.org/10.1109/WCNC.2012.6214470","url":null,"abstract":"Most nonlinear transceiver designs in amplify-and-forward (AF) multiple-input-multiple-output (MIMO) relay systems assume that instantaneous perfect channel state informations (CSIs) are available. Transceiver design with imperfect CSIs have rarely been addressed. In this paper, we consider an AF MIMO system in which a Tomlinson-Harashima precoder (THP) is used at the source, a linear precoder at the relay, and a minimum-mean-squared-error (MMSE) receiver at the destination. With the imperfect CSIs, we propose a new robust transceiver design method. It is shown that the optimization problem for the design is difficult due to the fact that the objective function is a nonlinear function of the source and relay precoders and yet the constraints are coupled. To overcome the problem, we adopt the primal decomposition technique, decomposing the original optimization into a subproblem and a master problem. To facilitate the derivation of the solution, we propose cascading THP with a unitary precoder and using a lower bound of the objective function. In this way, we can translate the original matrix-valued optimization into the scalar-valued concave optimization. Using the Karush-Kuhn-Tucker (KKT) conditions, we can finally obtain the closed-form solutions for the relay and source precoders. Simulations show that the proposed design is effective against the imperfect CSIs.","PeriodicalId":329194,"journal":{"name":"2012 IEEE Wireless Communications and Networking Conference (WCNC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133588629","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