2010 IEEE 71st Vehicular Technology Conference最新文献

Digital Right Management and Software Protection on Android Phones Android手机的数字版权管理与软件保护

2010 IEEE 71st Vehicular Technology Conference Pub Date : 2010-05-16 DOI: 10.1109/VETECS.2010.5493648

Chen-Yuan Chuang, Yu-Chun Wang, Yi-Bing Lin

引用次数: 18

Reference Signal Design for Flexible MIMO Operation in LTE-Advanced Downlink LTE-Advanced下行链路灵活MIMO操作的参考信号设计

2010 IEEE 71st Vehicular Technology Conference Pub Date : 2010-05-16 DOI: 10.1109/VETECS.2010.5493965

Tommi Koivisto, Karol Schober, Tero Kuosmanen, T. Roman, M. Enescu

{"title":"Reference Signal Design for Flexible MIMO Operation in LTE-Advanced Downlink","authors":"Tommi Koivisto, Karol Schober, Tero Kuosmanen, T. Roman, M. Enescu","doi":"10.1109/VETECS.2010.5493965","DOIUrl":"https://doi.org/10.1109/VETECS.2010.5493965","url":null,"abstract":"In this paper we address the issue of demodulation reference signal design for LTE-Advanced downlink. Practical systems such as LTE-Advanced should operate in highly time-frequency selective environment. Hence, they impose a very tight trade-off between the radio resources available for reference signals used for channel estimation and spectral efficiency targets to be met. As an additional constraint, LTE-Advanced brings to real deployments state-of-the-art multi-antenna technologies such as multi-user MIMO and cooperative MIMO. The difficult radio environment and the multitude of different multi-antenna techniques set very high challenges to the reference signal design. In this paper we discuss selected issues of realistic demodulation reference signal design for LTE-Advanced. We highlight the trade-offs that are needed for enabling advanced MIMO technologies, while at the same time allowing low complexity channel estimation at the receiver side without increasing related signaling overhead. Based on the analysis we propose a certain reference signal design for LTE-Advanced that fulfills all the required design criteria.","PeriodicalId":325246,"journal":{"name":"2010 IEEE 71st Vehicular Technology Conference","volume":"129 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117203017","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: 18

Achievable Throughput for Dual-Mode Limited-Feedback Transmit Beamforming over Temporally Correlated Wireless Channels 时间相关无线信道上双模有限反馈发射波束形成的可实现吞吐量

2010 IEEE 71st Vehicular Technology Conference Pub Date : 2010-05-16 DOI: 10.1109/VETECS.2010.5493750

Yi-Chieh Chang, Jwo-Yuh Wu, Ta-Sung Lee

{"title":"Achievable Throughput for Dual-Mode Limited-Feedback Transmit Beamforming over Temporally Correlated Wireless Channels","authors":"Yi-Chieh Chang, Jwo-Yuh Wu, Ta-Sung Lee","doi":"10.1109/VETECS.2010.5493750","DOIUrl":"https://doi.org/10.1109/VETECS.2010.5493750","url":null,"abstract":"Achieving high system throughput for limited- feedback communications against the time-varying channel effect is rather crucial in modern mobile system designs. Within the beamforming setup, this paper derives analytic throughput results for both the \"more feedback less often\" and \"less feedback more often\" scenarios. More specifically, under the assumptions that (i) the channels over two consecutive time slots follow the first-order Markov model and (ii) in each time slot, reliable feedback of a fixed amount of bits is allowed, the achievable system throughput over two consecutive time slots in both scenarios are characterized. In particular, while the exact throughput is in an integral form, we derive the associated closed-form approximate formulae which facilitate throughput evaluation without resorting to numerical integration. The analytic results also lead to a very low-complexity throughput-based mode selection scheme. Simulation study shows that: (1) the derived closed-form approximation is quite accurate; (2) with the aid of the proposed mode selection method, the throughput performance is robust against the channel temporal variation.","PeriodicalId":325246,"journal":{"name":"2010 IEEE 71st Vehicular Technology Conference","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124827216","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

Robust Geographic Routing with Virtual Destination Based Void Handling for MANETs 基于虚拟目的地空处理的稳健地理路由

2010 IEEE 71st Vehicular Technology Conference Pub Date : 2010-05-16 DOI: 10.1109/VETECS.2010.5494223

Shengbo Yang, C. Yeo, Bu-Sung Lee

引用次数: 8

Cooperative Hybrid ARQ in Wireless Decode-and-Forward Relay Networks 无线译码转发中继网络中的协同混合ARQ

2010 IEEE 71st Vehicular Technology Conference Pub Date : 2010-05-16 DOI: 10.1109/VETECS.2010.5493996

Wei Ni, Zhuo Chen, I. Collings

{"title":"Cooperative Hybrid ARQ in Wireless Decode-and-Forward Relay Networks","authors":"Wei Ni, Zhuo Chen, I. Collings","doi":"10.1109/VETECS.2010.5493996","DOIUrl":"https://doi.org/10.1109/VETECS.2010.5493996","url":null,"abstract":"Wireless decode-and-forward (DF) relay networks suffer from severe latency due to multi-hop propagation. When hybrid ARQ (HARQ) is employed, the latency leads to the throughout degradation of individual HARQ processes because of the decreased number of retransmissions of unsuccessful packets in a given time. We propose two new distributed cooperative HARQ protocols to not only reduce latency but also optimize throughput in both forward and reverse DF links. Additional selection diversity from multiple packets is exploited to compensate for the throughput loss stemming from the less powerful source in the reverse DF link. Based on the 1st hop reception quality, each relay station (RS) independently forwards the packet in such a manner that, from the perspective of the destination, one of the three cooperative relaying modes is effectively formed with the highest instantaneous throughput: spatial multiplexing (SM), space-time transmit diversity (STTD) and unicast (UC). The maximal throughput can be achieved with minimal latency. The superiority of the proposed approaches has been demonstrated in terms of the optimal spectral efficiency and significant reduction in latency. Compared to the centralized approaches, the reduction is up to 40% at high signal-to-noise ratio (SNR) and the throughput of individual HARQ processes increases as a result.","PeriodicalId":325246,"journal":{"name":"2010 IEEE 71st Vehicular Technology Conference","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125259780","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

MMSE Solution for OFDMA Systems with Carrier Frequency Offset Correction 载波频偏校正OFDMA系统的MMSE解决方案

2010 IEEE 71st Vehicular Technology Conference Pub Date : 2010-05-16 DOI: 10.1109/VETECS.2010.5493850

D. Chang, Tsung-Han Li

引用次数: 1

Stochastic Resonance Pre-Processing for Estimating Doppler Frequency Shift under Low SNR Conditions 低信噪比条件下估计多普勒频移的随机共振预处理

2010 IEEE 71st Vehicular Technology Conference Pub Date : 2010-05-16 DOI: 10.1109/VETECS.2010.5493808

Liping Wu, Zan Li, Jiandong Li, Yongxing Sun, Yi Li

引用次数: 0

Cooperative Spectrum Sensing in Cognitive Radio under Noise Uncertainty 噪声不确定性下认知无线电协同频谱感知

2010 IEEE 71st Vehicular Technology Conference Pub Date : 2010-05-16 DOI: 10.1109/VETECS.2010.5494009

Haijun Wang, Yi Xu, Xin Su, Jing Wang

引用次数: 26

A Time Scheduling Scheme Used For Multi-Cells Indoor Localization 一种多小区室内定位的时间调度方法

2010 IEEE 71st Vehicular Technology Conference Pub Date : 2010-05-16 DOI: 10.1109/VETECS.2010.5493646

J. X. Lee, F. Chin, Z. W. Lin

{"title":"A Time Scheduling Scheme Used For Multi-Cells Indoor Localization","authors":"J. X. Lee, F. Chin, Z. W. Lin","doi":"10.1109/VETECS.2010.5493646","DOIUrl":"https://doi.org/10.1109/VETECS.2010.5493646","url":null,"abstract":"Indoor localization is becoming an important application for wireless sensor networks. In order to determine sensors location, ranging packets need to be transmitted. Therefore, a good scheduling scheme is needed in order to avoid collision during packet transmission. Current wireless cellular network allows sensors inside the network to transmit without packet collision by using frequency reuse method or assigning different orthogonal code sequences to every individual sensor so that they can transmit at the same time. One of the drawbacks in the earlier method is the requirement for a large frequency band that must be wide enough to allocate frequencies to all the sensors inside a network. For the latter method, there is a limited number of code sequences that can be assigned to all the sensors inside the network. Therefore in this paper, we first proposed a time scheduling method for ranging packet transmission to avoid packet collision in order to locate a large number of people or objects inside an indoor environment at the same time. The proposed method allows sensors to transmit at different time slot. They are able to use the same frequency across the entire network and interference between neighboring cells is avoided. In addition, frequency guard band is no longer required, therefore, it is bandwidth saving. This makes the system to be scalable to large network coverage, low cost and simple to operate. Secondly, we modified our localization method to suit this time scheduling scheme so that it can perform both offline and online localization for a multi-cell indoor environment.","PeriodicalId":325246,"journal":{"name":"2010 IEEE 71st Vehicular Technology Conference","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122795550","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

Simulation and Evaluation of Car-to-Car Communication Channels in Urban Intersection Scenarios 城市交叉口场景下车对车通信信道仿真与评价

2010 IEEE 71st Vehicular Technology Conference Pub Date : 2010-05-16 DOI: 10.1109/VETECS.2010.5494122

L. Reichardt, J. Pontes, C. Sturm, T. Zwick

引用次数: 8