VTC Spring 2009 - IEEE 69th Vehicular Technology Conference最新文献_第4页

Cellular In-Band Modem Solution for eCall Emergency Data Transmission 用于呼叫紧急数据传输的蜂窝带内调制解调器解决方案

VTC Spring 2009 - IEEE 69th Vehicular Technology Conference Pub Date : 2009-04-26 DOI: 10.1109/VETECS.2009.5073434

M. Werner, C. Pietsch, Christoph Joetten, C. Sgraja, G. Frank, W. Granzow, Jeff Huang

引用次数: 28

JAMES: JAva test-bed ManagEment System JAMES: JAva测试平台管理系统

VTC Spring 2009 - IEEE 69th Vehicular Technology Conference Pub Date : 2009-04-26 DOI: 10.1109/VETECS.2009.5073628

M. Mastrogiovanni, Alessandro Modesti, C. Petrioli

引用次数: 2

A Novel Architecture using NVIDIA CUDA to Speed Up Simulation of Multi-Path Fast Fading Channels 采用NVIDIA CUDA加速多径快速衰落信道仿真的新架构

VTC Spring 2009 - IEEE 69th Vehicular Technology Conference Pub Date : 2009-04-26 DOI: 10.1109/VETECS.2009.5073317

Ahmed Fathy Abdelrazek, Matthias Kaschub, Christian Blankenhorn, M. Necker

引用次数: 14

Iterative Detection Aided DL SDMA Systems Using Quantized Channel Impulse Response 利用量化信道脉冲响应的迭代检测辅助DL SDMA系统

VTC Spring 2009 - IEEE 69th Vehicular Technology Conference Pub Date : 2009-04-26 DOI: 10.1109/VETECS.2009.5073624

Chun-Yi Wei, Du Yang, Lie-liang Yang, L. Hanzo

{"title":"Iterative Detection Aided DL SDMA Systems Using Quantized Channel Impulse Response","authors":"Chun-Yi Wei, Du Yang, Lie-liang Yang, L. Hanzo","doi":"10.1109/VETECS.2009.5073624","DOIUrl":"https://doi.org/10.1109/VETECS.2009.5073624","url":null,"abstract":"An iterative detection aided Down-Link (DL) Space Division Multiple Access (SDMA) system is proposed. The Base Station (BS) requires DL Channel State Information (CSI) estimated by and fed back from the Mobile Station (MS) for separating the DL signals to be transmitted to the MSs from the BS. We investigate the achievable system performance subject to finite-accuracy CSI feedback. The achievable receiver performance is investigated with the aid of Extrinsic Information Transfer (EXIT) Charts. Further- more, a novel concept, referred to as the EXIT-Chart Optimized CSI Quantization (ECO-CQ) is proposed. The ECO-CQ scheme assists the system in maintaining the lowest possible CSI feedback overhead, while ensuring that an open EXIT-tunnel is still attainable, which implies maintaining an infinitesimally low BER. Furthermore, we demonstrate that the proposed ECO-CQ may reduce the normalized feedback overhead compared to the conventional CQ. For instance, the ECO-CQ aided iterative DL-SDMA system using an average of q =2 .7 quantization bits per CIR coefficient achieves a 10% normalized overhead reduction at Eb/N0 =5 dB, compared to the conventional CQ aided benchmarker system.","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":"126673701","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: 1

Low-Antenna Ultra Wideband Spatial Correlation Analysis in a Forest Environment 森林环境下低天线超宽带空间相关分析

VTC Spring 2009 - IEEE 69th Vehicular Technology Conference Pub Date : 2009-04-26 DOI: 10.1109/VETECS.2009.5073656

C. Anderson, H. Volos, W. Headley, R. Buehrer, Francisco C. B. F. Müller

{"title":"Low-Antenna Ultra Wideband Spatial Correlation Analysis in a Forest Environment","authors":"C. Anderson, H. Volos, W. Headley, R. Buehrer, Francisco C. B. F. Müller","doi":"10.1109/VETECS.2009.5073656","DOIUrl":"https://doi.org/10.1109/VETECS.2009.5073656","url":null,"abstract":"Impulse ultra wideband (UWB) communications promises a number of potential benefits for use in wireless sensor networks-particularly in forest environments where it can provide robust operation along with the ability to combine communications with precision position location. Additionally, MIMO communications for UWB provides the ability to take advantage of the rich multipath diversity inherent to UWB communications in order to provide enhanced robustness to fading as well as improved coverage in non line-of-sight scenarios. In this paper, we present a detailed analysis of the spatial correlation of UWB signals in a forest environment. Propagation measurements were performed using a 620 picosecond duration UWB pulse in four different forest environments: light brush, light, medium, and dense forest at distances of up to 50 meters. The mean spatial correlation was observed to vary based on forest environment, antenna type, antenna array orientation, and transmitter-receiver separation distance. These measurement results should aid in the development of MIMO algorithms for UWB outdoor communications.","PeriodicalId":253546,"journal":{"name":"VTC Spring 2009 - IEEE 69th Vehicular Technology Conference","volume":"14 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":"126896545","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: 6

A Robust Relay Selection Strategy for Cooperative Systems with Outdated CSI 具有过时CSI的合作系统的鲁棒中继选择策略

VTC Spring 2009 - IEEE 69th Vehicular Technology Conference Pub Date : 2009-04-26 DOI: 10.1109/VETECS.2009.5073336

J. Vicario, A. Bel, A. Morell, G. Seco-Granados

引用次数: 13

Localization of Sensor Nodes in a Wireless Sensor Network Using the nanoLOC TRX Transceiver 利用nanoLOC TRX收发器定位无线传感器网络中的传感器节点

VTC Spring 2009 - IEEE 69th Vehicular Technology Conference Pub Date : 2009-04-26 DOI: 10.1109/VETECS.2009.5073650

Christof Röhrig, M. Müller

引用次数: 44

Efficient User Selection and Ordering Algorithms for Successive Zero-Forcing Precoding for Multiuser MIMO Downlink 多用户MIMO下行链路连续强制零预编码的高效用户选择和排序算法

VTC Spring 2009 - IEEE 69th Vehicular Technology Conference Pub Date : 2009-04-26 DOI: 10.1109/VETECS.2009.5073528

S. Sigdel, W. Krzymień

{"title":"Efficient User Selection and Ordering Algorithms for Successive Zero-Forcing Precoding for Multiuser MIMO Downlink","authors":"S. Sigdel, W. Krzymień","doi":"10.1109/VETECS.2009.5073528","DOIUrl":"https://doi.org/10.1109/VETECS.2009.5073528","url":null,"abstract":"In this paper we consider user scheduling problem for linearly preceded multiuser multiple-input multiple-output (MIMO) downlink, where base station as well as the mobile receivers are equipped with multiple antennas. Optimal precoding involves dirty paper coding (DPC) technique, and it is highly nonlinear and complex. On the other hand, complete inter-user interference cancellation using linear zero-forcing or block diagonalization precoding are suboptimal. Hence, we consider successive zero-forcing precoding, which achieves improved system throughput compared to block diagonalization by allowing users to work under limited interference. Due to the dimensionality constraint of linear precoding techniques user scheduling is required. The optimal user scheduling involves exhaustive search, which becomes very complex for realistic numbers of users and transmit antennas. In addition, for successive zero-forcing precoding the order in which users are precoded successively is important for sum rate maximization, which further increases the complexity of exhaustive search. In this paper we develop a low complexity greedy user scheduling algorithm for successive zero-forcing precoding, which incorporates various user ordering techniques. Simplified heuristic scheduling metrics are proposed, which are shown to perform close to the exhaustive search method. A suboptimal user ordering technique that is similar to the order, in which the proposed greedy user selection selects users, is proposed. Further simplification of regular greedy scheduling algorithm is obtained with the proposed intermediate user grouping technique. The proposed algorithm is of low complexity, but provides performance close to the highly complex exhaustive search algorithm.","PeriodicalId":253546,"journal":{"name":"VTC Spring 2009 - IEEE 69th Vehicular Technology Conference","volume":"16 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":"123363914","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

Efficient Coded Bit and Power Loading for BICM-OFDM BICM-OFDM的有效编码位和功率负载

VTC Spring 2009 - IEEE 69th Vehicular Technology Conference Pub Date : 2009-04-26 DOI: 10.1109/VETECS.2009.5073525

C. Bockelmann, D. Wübben, K. Kammeyer

引用次数: 11

CSMA with Enhanced Collision Avoidance: A Performance Assessment 增强防撞功能的CSMA:性能评估

VTC Spring 2009 - IEEE 69th Vehicular Technology Conference Pub Date : 2009-04-26 DOI: 10.1109/VETECS.2009.5073486

J. Barceló, B. Bellalta, A. Sfairopoulou, C. Cano, M. Oliver

引用次数: 41