2010 IEEE 72nd Vehicular Technology Conference - Fall最新文献

Novel Approaches to Determine the Optimal Operating Point of Spectrum Sensing in Overlay Spectrum Sharing 覆盖频谱共享中确定频谱感知最佳工作点的新方法

2010 IEEE 72nd Vehicular Technology Conference - Fall Pub Date : 2010-10-04 DOI: 10.1109/VETECF.2010.5594277

M. Khoshkholgh, K. Navaie, H. Yanikomeroglu

引用次数: 7

Range and Bearing Estimation for Near-Field Sources 近场源的距离和方位估计

2010 IEEE 72nd Vehicular Technology Conference - Fall Pub Date : 2010-10-04 DOI: 10.1109/VETECF.2010.5594340

N. Tayem, Champike Attanaayake, A. Abatan

{"title":"Range and Bearing Estimation for Near-Field Sources","authors":"N. Tayem, Champike Attanaayake, A. Abatan","doi":"10.1109/VETECF.2010.5594340","DOIUrl":"https://doi.org/10.1109/VETECF.2010.5594340","url":null,"abstract":"Most of the array signal processing methods for the estimation of the direction of arrival angle estimation (DOA) for multiple incident sources are based on the far-field assumption. When the sources are located close to the antenna array, these methods are no longer valid. In this paper, a new method is presented for the joint range and DOA estimation for multiple near-field sources. The proposed method proceeds in two steps. In the first step, we construct the Toeplitz matrix using only the second-order statistics and employ rank revealing QR factorization (RRQR) to estimate the DOA. In the second step, we reconstruct the Toeplitz matrix from the collection data only which is equivalent to first-order statistics and employ the RRQR to estimate the range. Compared with existing schemes, the proposed schemes provide several advantages. First, the computation of RRQR for Toeplitz matrix require O(n2) whereas the existing schemes requiring eigenvalue decomposition (EVD) or singular value decomposition (SVD) for an cross spectral matrix. However using SVD or EVD require much more computational complexity O(n3). Second, the proposed method is more suitable for high speed communication since it requires second or first order statistics and a single snapshot. However, the existing method involves multidimensional research or high order statistics which increase the complexity and computational load further. Third, the proposed method does not require any pair matching for the range and DOA for multiple sources. The simulation results verify that the proposed method provide good performance with less computational complexity.","PeriodicalId":417714,"journal":{"name":"2010 IEEE 72nd Vehicular Technology Conference - Fall","volume":"71 23","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120808222","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

Investigation of Two-Dimensional Orthogonal Sequence Mapping to Multi-Layer Reference Signal for LTE-Advanced Downlink LTE-Advanced下行链路二维正交序列映射到多层参考信号的研究

2010 IEEE 72nd Vehicular Technology Conference - Fall Pub Date : 2010-10-04 DOI: 10.1109/VETECF.2010.5594395

K. Takeda, Y. Kishiyama, M. Tanno, Takehiro Nakamura

{"title":"Investigation of Two-Dimensional Orthogonal Sequence Mapping to Multi-Layer Reference Signal for LTE-Advanced Downlink","authors":"K. Takeda, Y. Kishiyama, M. Tanno, Takehiro Nakamura","doi":"10.1109/VETECF.2010.5594395","DOIUrl":"https://doi.org/10.1109/VETECF.2010.5594395","url":null,"abstract":"In the LTE-Advanced downlink, to satisfy high-level performance requirements, advanced multi-antenna transmission techniques such as higher-order single-user (SU)-MIMO, multi-user (MU)-MIMO, and coordinated multi-point transmission/reception (CoMP) are key. At the 3GPP RAN WG1 meeting, the demodulation reference signal (DM-RS) was defined to support channel estimation and data demodulation for up to eight transmission layers. A hybrid code division multiplexing (CDM) and frequency division multiplexing (FDM) scheme was adopted as a DM-RS multiplexing scheme. The time-domain orthogonal cover code (OCC) is used for CDM since time domain orthogonality among OCCs is relatively robust against channel variation. However, in a medium-to-high mobility environment, orthogonality distortion occurs among OCCs, which results in performance degradation. In this paper, we propose a two-dimensional (2D) OCC that achieves two-dimensional orthogonality in the time and frequency domains to improve the performance of CDM-based DM-RSs while reducing the peak transmit power of each OFDM symbol where CDM-based DM-RS are mapped. Simulation results show that the 2D OCC is effective in improving the block error rate performance especially in a medium-to-high mobility environment. Furthermore, it is shown that the proposed 2D OCC effectively reduces the peak transmit power compared to the time-domain OCC.","PeriodicalId":417714,"journal":{"name":"2010 IEEE 72nd Vehicular Technology Conference - Fall","volume":"67 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120907651","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

Analysis of IEEE 802.15.4 Throughput in Beaconless Mode on micaZ under TinyOS 2 TinyOS 2下micaZ上无信标模式下IEEE 802.15.4吞吐量分析

2010 IEEE 72nd Vehicular Technology Conference - Fall Pub Date : 2010-10-04 DOI: 10.1109/VETECF.2010.5594493

Nelson I. Dopico, Carlos Gil-Soriano, I. Arrazola, S. Zazo

引用次数: 15

Architectural Analysis of a Smart DMA Controller for Protocol Stack Acceleration in LTE Terminals LTE终端协议栈加速智能DMA控制器的体系结构分析

2010 IEEE 72nd Vehicular Technology Conference - Fall Pub Date : 2010-10-04 DOI: 10.1109/VETECF.2010.5594536

S. Hessel, David Szczesny, Felix Bruns, A. Bilgic, J. Hausner

引用次数: 3

Efficient Gateway Discovery Algorithms for Delay-Tolerant and Delay-Constrained Data Traffic in Vehicular Ad-hoc Networks 车载Ad-hoc网络中延迟容忍和延迟约束数据流量的有效网关发现算法

2010 IEEE 72nd Vehicular Technology Conference - Fall Pub Date : 2010-10-04 DOI: 10.1109/VETECF.2010.5594501

Francisco J. Ros, P. M. Ruiz

引用次数: 7

Performance Evaluation for Resource Allocation Algorithms in CoMP Systems CoMP系统中资源分配算法的性能评价

2010 IEEE 72nd Vehicular Technology Conference - Fall Pub Date : 2010-10-04 DOI: 10.1109/VETECF.2010.5594241

Rodrigo L. Batista, R. Santos, T. Maciel, W. Freitas, F. Cavalcanti

引用次数: 26

Cognitive Optimization Scheme of Coverage for Femtocell Using Multi-Element Antenna 基于多单元天线的飞基站覆盖认知优化方案

2010 IEEE 72nd Vehicular Technology Conference - Fall Pub Date : 2010-10-04 DOI: 10.1109/VETECF.2010.5594579

Yizhe Li, Z. Feng, Qixun Zhang, Li Tan, Fang Tian

{"title":"Cognitive Optimization Scheme of Coverage for Femtocell Using Multi-Element Antenna","authors":"Yizhe Li, Z. Feng, Qixun Zhang, Li Tan, Fang Tian","doi":"10.1109/VETECF.2010.5594579","DOIUrl":"https://doi.org/10.1109/VETECF.2010.5594579","url":null,"abstract":"Recently, femtocell has been proposed as a good solution to increase the coverage area and capacity of the wireless communication system as well as meet the increasing demand for high data rate. The femtocell is low-cost, low-power and can be realized by deploying a femto-base-station connected to the core network via a wired-backhaul. Since the femtocell reuses the macrocell spectrum, co-channel interference between femtocell and macrocell should be taken into consideration first of all. The leakage of femtocell's pilot power to the outside of a residence would cause passing users' handover events and result in increasing load to the network. In this paper, firstly we put forward a simple method for the femtocell to gain recognition of the residence and network environment, and then according to the obtained knowledge the femtocell carries out self-cofiguration and self-optimization for the purpose of achieving an optimized coverage to improve the in door Quality of Service (QoS) and minimum the interference in the existing network. To implement that we bring up a low-cost multi-element antenna solution and a series of corresponding algorithms, which is mainly based on low-complexity shaped beam forming and power adjusting. The simulation results show that the approaches proposed in the paper greatly reduce the femtocell's interference to the macrocell and optimize indoor coverage at the same time. These results can provide guidelines for the deployment of femtocell.","PeriodicalId":417714,"journal":{"name":"2010 IEEE 72nd Vehicular Technology Conference - Fall","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125677161","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

Reliable Network Coded MAC in Vehicular Ad-Hoc Networks 车载Ad-Hoc网络中的可靠网络编码MAC

2010 IEEE 72nd Vehicular Technology Conference - Fall Pub Date : 2010-10-04 DOI: 10.1109/VETECF.2010.5594492

Behnam Hassanabadi, S. Valaee

引用次数: 17

A Model Based Connectivity Improvement Strategy for Vehicular Ad hoc Networks 基于模型的车载Ad hoc网络连通性改进策略

2010 IEEE 72nd Vehicular Technology Conference - Fall Pub Date : 2010-10-04 DOI: 10.1109/VETECF.2010.5594525

Yang Yang, Zhenqiang Mi, James Yifei Yang, Guangjun Liu

引用次数: 12