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2006 Symposium on Communications and Vehicular Technology最新文献

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Phased Array Antenna Steering Using a Ring Resonator-Based Optical Beam Forming Network 基于环形谐振器的光束形成网络的相控阵天线转向
2006 Symposium on Communications and Vehicular Technology Pub Date : 2006-11-23 DOI: 10.1109/SCVT.2006.334363
A. Meijerink, C. Roeloffzen, L. Zhuang, D. Marpaung, R. Heideman, A. Borreman, W. van Etten
{"title":"Phased Array Antenna Steering Using a Ring Resonator-Based Optical Beam Forming Network","authors":"A. Meijerink, C. Roeloffzen, L. Zhuang, D. Marpaung, R. Heideman, A. Borreman, W. van Etten","doi":"10.1109/SCVT.2006.334363","DOIUrl":"https://doi.org/10.1109/SCVT.2006.334363","url":null,"abstract":"A novel beam steering mechanism for a phased array antenna receiver system is introduced. The core of the system is a ring resonator-based integrated optical beam forming network chip. Its principles are explained and demonstrated by presenting some measurement results. The system architecture around the chip is based on a combination of frequency down conversion, filter-based optical single sideband modulation and balanced coherent detection. It is proven that such an architecture has significant advantages with respect to a straightforward architecture using double sideband modulation and direct detection, namely relaxed bandwidth requirements on the optical modulators and detectors, reduced complexity and optical losses of the beam forming chip, and enhanced dynamic range","PeriodicalId":233922,"journal":{"name":"2006 Symposium on Communications and Vehicular Technology","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122225621","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: 33
UWB based positioning: Cramer Rao bound for Angle Of Arrival and comparison with Time Of Arrival 基于超宽带的定位:Cramer Rao对到达角的约束和与到达时间的比较
2006 Symposium on Communications and Vehicular Technology Pub Date : 2006-11-01 DOI: 10.1109/SCVT.2006.334374
A. Mallat, J. Louveaux, L. Vandendorpe
{"title":"UWB based positioning: Cramer Rao bound for Angle Of Arrival and comparison with Time Of Arrival","authors":"A. Mallat, J. Louveaux, L. Vandendorpe","doi":"10.1109/SCVT.2006.334374","DOIUrl":"https://doi.org/10.1109/SCVT.2006.334374","url":null,"abstract":"In this paper we consider the potential of UWB (ultra wide band) signals for positioning. We consider both TOA (time of arrival) and AOA (angle of arrival) based methods. For the AOA method we use a linear array of equi-spaced elements. We derive the CRB associated with this method, without using the monochromatic assumption. The CRBs of both methods are compared. The analytical results are illustrated for UWB signals having the spectral occupation fulfilling the FCC emission mask. We show that, for far field conditions and practical numbers of antenna array elements, TOA outperforms AOA. However the accuracy provided by AOA is shown to be very interesting","PeriodicalId":233922,"journal":{"name":"2006 Symposium on Communications and Vehicular Technology","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127863188","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
A Scheme of Fractional Modulation for Wireless OFDM 一种无线OFDM分式调制方案
2006 Symposium on Communications and Vehicular Technology Pub Date : 2006-11-01 DOI: 10.1109/SCVT.2006.334373
F. Benedetto, G. Giunta
{"title":"A Scheme of Fractional Modulation for Wireless OFDM","authors":"F. Benedetto, G. Giunta","doi":"10.1109/SCVT.2006.334373","DOIUrl":"https://doi.org/10.1109/SCVT.2006.334373","url":null,"abstract":"This work proposes a new multi-carrier transmission scheme through the use of a fractionally modulation before data transmission. The idea is to exploit the correlation between the OFDM symbols at neighboring sub-carriers by means of an interpolation process. We propose a new OFDM scheme that sends interpolated data vectors and reconstructs at the receiver's side the original data vectors for all sub-carriers. We have evaluated the system's performance under realistic channel conditions using two CDMA test channels. Computer simulations show that the proposed scheme outperforms the conventional OFDM in terms of BER as well as in terms of noise immunity","PeriodicalId":233922,"journal":{"name":"2006 Symposium on Communications and Vehicular Technology","volume":"192 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124262117","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
Optimal Resource Allocation for MIMO OFDM-CDM Systems under Power, QoS and Fairness Constraints 功率、QoS和公平性约束下MIMO OFDM-CDM系统的最优资源分配
2006 Symposium on Communications and Vehicular Technology Pub Date : 2006-11-01 DOI: 10.1109/SCVT.2006.334368
F. Brah, J. Louveaux, L. Vandendorpe
{"title":"Optimal Resource Allocation for MIMO OFDM-CDM Systems under Power, QoS and Fairness Constraints","authors":"F. Brah, J. Louveaux, L. Vandendorpe","doi":"10.1109/SCVT.2006.334368","DOIUrl":"https://doi.org/10.1109/SCVT.2006.334368","url":null,"abstract":"In this paper we consider resource allocation for throughput maximization and QoS/fairness support in the downlink of a multiuser multi-antennas OFDM-CDM systems with transmit zero-forcing beamforming. The impact of the relaxation of the QoS/fairness constraints on the system throughput is analyzed. The resource allocation problem, with relaxable constraints, formulated as a nonlinear nonconvex optimization problem is efficiently and globally solved through geometric programming in his convex form. Simulation results are provided for different values of the relaxation parameters and illustrate the achievable trade-off between system throughput and QoS/fairness requirements","PeriodicalId":233922,"journal":{"name":"2006 Symposium on Communications and Vehicular Technology","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125971529","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
Air Interface and Physical Layer techniques for 60 GHz WPANs 60 GHz无线广域网的空中接口和物理层技术
2006 Symposium on Communications and Vehicular Technology Pub Date : 2006-11-01 DOI: 10.1109/SCVT.2006.334362
A. Bourdoux, J. Nsenga, W. Van Thillo, F. Horlin, L. Van der Perre
{"title":"Air Interface and Physical Layer techniques for 60 GHz WPANs","authors":"A. Bourdoux, J. Nsenga, W. Van Thillo, F. Horlin, L. Van der Perre","doi":"10.1109/SCVT.2006.334362","DOIUrl":"https://doi.org/10.1109/SCVT.2006.334362","url":null,"abstract":"Thanks to the unprecedented availability of huge bandwidth, the capacity offered by wireless systems in the 60 GHz band can exceed the mythical barrier of 1 Gbps wireless, enabling the deployment of new applications. However, the performance can be limited by the non-ideality of the analog front-ends, multipath fading and the difficulty to achieve a reasonable link budget at high data rates. The goal of this paper is to introduce high rate communications in the 60 GHz band and the associated challenges. We will first introduce WPANs in the 60 GHz band, describing the possible applications, the propagation channel and the standardization context. Furthermore, based on the characteristics of the propagation channel, we will show that beamforming is desirable to boost the link budget, reduce interference and, in some cases, reduce multipath. Next, we will introduce candidate PHY layer solutions that at the same time meet the throughput requirements and relax the analog front-end design. Our solutions rely on the combination of block transmission combined with (nearly) constant envelope modulation: this provides low peak-to-average power ratios, easy equalization, good spectral properties and modest front-end requirements in terms of phase noise and ADC resolution. The receiver signal processing associated with the modulation techniques will be described and link level simulation results will be provided, highlighting the \"front-end friendliness\" of the modulation technique","PeriodicalId":233922,"journal":{"name":"2006 Symposium on Communications and Vehicular Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129225604","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: 14
A New Medium Access Control Protocol for the Next Generation Wireless Ad Hoc Networks 一种新一代无线自组织网络的介质访问控制协议
2006 Symposium on Communications and Vehicular Technology Pub Date : 2006-11-01 DOI: 10.1109/SCVT.2006.334378
K. Ghaboosi, M. Latva-aho
{"title":"A New Medium Access Control Protocol for the Next Generation Wireless Ad Hoc Networks","authors":"K. Ghaboosi, M. Latva-aho","doi":"10.1109/SCVT.2006.334378","DOIUrl":"https://doi.org/10.1109/SCVT.2006.334378","url":null,"abstract":"In ad hoc wireless networks, there are scenarios where the desired destination is located in the range of other transmitters, so that the efforts on setting up communication with this terminal will fail due to collisions that may occur between transmitted control frames and undesired received control and data frames. This phenomenon becomes a bottleneck when most of data transmissions experience packet fragmentation. In such scenarios, the desired destination becomes unreachable during the data transfer of neighboring nodes. Using the same PHY of IEEE 802.11 and making slight modifications in its MAC, a new medium access control scheme equipped by a novel transmission scheduling algorithm is presented to address such problems. The performance of the proposed approach is compared with earlier schemes through simulation-based evaluations, showing performance enhancement due to better handling of unreachability issues","PeriodicalId":233922,"journal":{"name":"2006 Symposium on Communications and Vehicular Technology","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123316431","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
Channel Identification and Equalization for Multi-Transmit Antenna MC-CDMA Systems with Orthogonal Space-Frequency Coding 基于正交空频编码的多发射天线MC-CDMA系统信道识别与均衡
2006 Symposium on Communications and Vehicular Technology Pub Date : 2006-11-01 DOI: 10.1109/SCVT.2006.334365
A. Marousis, P. Constantinou
{"title":"Channel Identification and Equalization for Multi-Transmit Antenna MC-CDMA Systems with Orthogonal Space-Frequency Coding","authors":"A. Marousis, P. Constantinou","doi":"10.1109/SCVT.2006.334365","DOIUrl":"https://doi.org/10.1109/SCVT.2006.334365","url":null,"abstract":"The combination of multi-carrier CDMA and multiple antennas is a very promising candidate for the downlink in 4G systems, since it achieves robustness, high spectral efficiency, and high data rates in rich scattering environments. This paper presents the design and evaluation of a channel identification scheme as a key factor for the overall performance of MC-CDMA systems. It is efficient by means of both the mean square error (MSE) and its incorporation in a real space-frequency coded MIMO system (BER). The evaluation has been performed over the spatial channel model according to 802.16e case of 3GPP.25.996, incorporating all IF/RF stages","PeriodicalId":233922,"journal":{"name":"2006 Symposium on Communications and Vehicular Technology","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125722829","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
Optimized Rotations for LDPC-coded Gray-mapped MPSK Constellations with Signal Space Diversity 具有信号空间分集的ldpc编码灰映射MPSK星座的优化旋转
2006 Symposium on Communications and Vehicular Technology Pub Date : 2006-11-01 DOI: 10.1109/SCVT.2006.334377
N. Kiyani, U. H. Rizvi, J. Weber, G. Janssen
{"title":"Optimized Rotations for LDPC-coded Gray-mapped MPSK Constellations with Signal Space Diversity","authors":"N. Kiyani, U. H. Rizvi, J. Weber, G. Janssen","doi":"10.1109/SCVT.2006.334377","DOIUrl":"https://doi.org/10.1109/SCVT.2006.334377","url":null,"abstract":"Rotation of the signal constellation together with in-phase and quadrature channel interleaving (signal space diversity) is known to provide good performance gains over fading channels for multi level modulation methods. This paper studies the extension of such schemes with a low density parity check (LDPC) code. It is shown that for both coded and un-coded Gray-mapped MPSK modulation formats with signal space diversity on a Rayleigh fading channel, a well-considered choice of the rotation angle may lead to a significant gain over the conventional un-rotated constellation. However, the optimum rotation angle for the coded scheme may be different from the corresponding optimization angle of the un-coded scheme","PeriodicalId":233922,"journal":{"name":"2006 Symposium on Communications and Vehicular Technology","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114480928","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
Feasibility Study of the Mesh Extension for the IEEE 802.16e Communication System IEEE 802.16e通信系统Mesh扩展的可行性研究
2006 Symposium on Communications and Vehicular Technology Pub Date : 2006-11-01 DOI: 10.1109/SCVT.2006.334381
Y. Lebrun, F. Horlin, A. Bourdoux, L. Van der Perre
{"title":"Feasibility Study of the Mesh Extension for the IEEE 802.16e Communication System","authors":"Y. Lebrun, F. Horlin, A. Bourdoux, L. Van der Perre","doi":"10.1109/SCVT.2006.334381","DOIUrl":"https://doi.org/10.1109/SCVT.2006.334381","url":null,"abstract":"The demand for wireless broadband access is rapidly growing. Consequently, the need for wireless systems offering both high speed data rates and high mobility access will become more and more important for present and future communication systems. An interesting candidate to fulfil those requirements is the OFDMA-based IEEE 802.16e wireless metropolitan area network system. In this paper, we study the possible implementation of the Mesh topology for the IEEE 802.16e standard. The reuse of the TDD frame structure considered in the point-to-multipoint topology will be discussed. The performance of the OFDMA air interface will be analyzed, for a varying spectral reuse factor and for different carrier allocations amongst the users","PeriodicalId":233922,"journal":{"name":"2006 Symposium on Communications and Vehicular Technology","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121111901","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: 4
Joint Carrier and Clock Offset Compensation in a Mobile 802.16E OFDMA Communication System 移动802.16E OFDMA通信系统中的载波和时钟偏移联合补偿
2006 Symposium on Communications and Vehicular Technology Pub Date : 2006-11-01 DOI: 10.1109/SCVT.2006.334372
F. Naessens, F. Horlin, L. Van der Perre
{"title":"Joint Carrier and Clock Offset Compensation in a Mobile 802.16E OFDMA Communication System","authors":"F. Naessens, F. Horlin, L. Van der Perre","doi":"10.1109/SCVT.2006.334372","DOIUrl":"https://doi.org/10.1109/SCVT.2006.334372","url":null,"abstract":"The IEEE 802.16e OFDMA mode is seen as the mobile extension for metropolitan area networks. The goal of the paper is to design an estimation and compensation scheme of both carrier frequency offset (CFO) and sample clock off-set (SCO). The estimations are performed in the frequency-domain based on an interpolation between the pilots located in two successive OFDMA symbols within the DE burst. It is shown that the estimated values derived from a DE burst can be used to pre-compensate the upcoming UE burst. Due to the limiting inter-carrier interference (ICI), the compensation of the CFO is performed in time-domain. On the contrary a frequency-domain compensation of the SCO is sufficient","PeriodicalId":233922,"journal":{"name":"2006 Symposium on Communications and Vehicular Technology","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133658259","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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