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IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211)最新文献

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Rate compatible punctured SCCC 速率兼容的穿孔SCCC
IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211) Pub Date : 2001-10-07 DOI: 10.1109/VTC.2001.957179
Hasung Kim, Gordon L. Stüber
{"title":"Rate compatible punctured SCCC","authors":"Hasung Kim, Gordon L. Stüber","doi":"10.1109/VTC.2001.957179","DOIUrl":"https://doi.org/10.1109/VTC.2001.957179","url":null,"abstract":"Wireless packet transmission requires an adaptive error control coding scheme that can accommodate varying code rate and very low FER requirements for high data rate transmission. Serial concatenated convolutional codes (SCCC) can provide lower FER performance than parallel concatenated convolutional codes (PCCC) in the region of moderate-to-high SNR because SCCC shows little error-flooring problem. This paper proposes a rate compatible punctured SCCC (RCPS) and RCPS-HARQ system to achieve adaptive and high reliable error control coding, and presents their performance on AWGN and multipath Rayleigh fading channels. Comparative results with rate compatible punctured PCCC (RCPP) and an example of a W-CDMA system are also given.","PeriodicalId":129008,"journal":{"name":"IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211)","volume":"156 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126593106","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: 12
Effects of forwarder coordination on the data transmission across HiperLAN/2 ad hoc subnets 转发器协调对跨HiperLAN/2自组织子网数据传输的影响
IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211) Pub Date : 2001-10-07 DOI: 10.1109/VTC.2001.957211
J. Peetz, Bane Strahinjic
{"title":"Effects of forwarder coordination on the data transmission across HiperLAN/2 ad hoc subnets","authors":"J. Peetz, Bane Strahinjic","doi":"10.1109/VTC.2001.957211","DOIUrl":"https://doi.org/10.1109/VTC.2001.957211","url":null,"abstract":"The HiperLAN/2 (H/2) standard has been designed by the European Telecommunications Standards Institute (ETSI) to provide high bit rate wireless communication in the 5 GHz frequency band. Beside infrastructure based networking, one-hop ad hoc communication for centrally coordinated single subnets is covered by a profile for home environments. The objective of a novel multiple-frequency forwarding technique, introduced in Peetz (2001) for the first time, was to overcome the restrictions of the one-hop configuration and to extend it to multihop ad hoc connectivity. This forwarding concept is very flexible in use and proved to fulfill even the quality of service requirements of MPEG video and constant bit rate traffic, see Peetz. The paper discusses the advantages of forwarder coordination, it proposes technical solutions, and evaluates the performance of double and triple subnet constellations with up to 4-hop inter-subnet routes.","PeriodicalId":129008,"journal":{"name":"IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126681982","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
Measurement-based simulation of mobile radio channels with multiple antennas using a directional parametric data model 使用方向参数数据模型的多天线移动无线电信道测量仿真
IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211) Pub Date : 2001-10-07 DOI: 10.1109/VTC.2001.956939
D. Hampicke, C. Schneider, M. Landmann, A. Richter, G. Sommerkorn, R. Thomä
{"title":"Measurement-based simulation of mobile radio channels with multiple antennas using a directional parametric data model","authors":"D. Hampicke, C. Schneider, M. Landmann, A. Richter, G. Sommerkorn, R. Thomä","doi":"10.1109/VTC.2001.956939","DOIUrl":"https://doi.org/10.1109/VTC.2001.956939","url":null,"abstract":"A parametric modeling approach for multiple input multiple output (MIMO) radio channels is introduced that is based on measured data. The MIMO measurement principle can be effectively exploited to estimate the propagation direction of any significant path at both ends of the wireless link simultaneously. From the estimated parameter sets a precise reconstruction of the multidimensional wave field in the aperture domains of time, frequency and space is possible. This enables various analyses and simulations of MIMO transmission links in a very realistic way.","PeriodicalId":129008,"journal":{"name":"IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211)","volume":"1 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120918327","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: 11
Ultra wideband DS-CDMA via innovations in chip shaping 通过芯片成型的创新实现超宽带DS-CDMA
IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211) Pub Date : 2001-10-07 DOI: 10.1109/VTC.2001.957194
Zhiqiang Wu, C. Nassar, S. Shattil
{"title":"Ultra wideband DS-CDMA via innovations in chip shaping","authors":"Zhiqiang Wu, C. Nassar, S. Shattil","doi":"10.1109/VTC.2001.957194","DOIUrl":"https://doi.org/10.1109/VTC.2001.957194","url":null,"abstract":"One important requirement for next generation wireless communication systems is the ability to support a wide range of high rate data services. Despite advances in efficient modulation and multiple access technologies, very high data rate transfer will still require ultra-wide frequency bands. Traditional DS-CDMA systems operate over one single continuous bandwidth, and with the limited spectrum available from the FCC auctioned off in small blocks, it will not be possible for DS-CDMA to operate over a contiguous ultra-wide frequency band. This paper demonstrates how a novel chip shaping scheme, designed specifically for DS-CDMA systems, enables DS-CDMA to operate over non-adjacent frequency bands in a way that is identical to its operation if all these bands are made contiguous. The chip shape corresponds to an interferometry pattern created by the superposition of N carriers (adjacent or non-adjacent in the frequency domain). Besides the ability to operate over non-adjacent bands, this novel chip shaping enables DS-CDMA to achieve very high performance by exploiting frequency diversity (instead of path diversity) over the combined bands. With the exception of chip shape and receiver design for operation over non-contiguous bands, this new system retains all the features of a traditional DS-CDMA system.","PeriodicalId":129008,"journal":{"name":"IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120955730","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: 5
Design and evaluation of an optimization based approach to multiple burst admission control for cdma2000 基于优化的cdma2000多突发接纳控制方法的设计与评价
IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211) Pub Date : 2001-10-07 DOI: 10.1109/VTC.2001.956587
V. Lau, Yu-Kwong Kwok
{"title":"Design and evaluation of an optimization based approach to multiple burst admission control for cdma2000","authors":"V. Lau, Yu-Kwong Kwok","doi":"10.1109/VTC.2001.956587","DOIUrl":"https://doi.org/10.1109/VTC.2001.956587","url":null,"abstract":"In our previous study, we have formulated the burst admission control problem for wideband CDMA systems as an integer programming problem. In this paper, we propose and analyze the performance of a novel burst admission technique, called the multiple-burst admission-spatial dimension algorithm (MBA-SD) to judiciously allocate the previous channels in wideband CDMA systems to burst requests. Both the forward link and the reverse link burst requests are considered and the system is simulated by dynamic simulations which takes into account the user mobility, power control and soft hand-off. We found that significant performance improvement, in terms of data user capacity, coverage, and admission and outage probabilities, could be achieved by our scheme compared to the existing burst assignment algorithms.","PeriodicalId":129008,"journal":{"name":"IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116249204","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
Iterative interference cancellation scheme with pilot-aided space-time estimation in DS-CDMA systems DS-CDMA系统中导频辅助空时估计的迭代干扰抵消方案
IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211) Pub Date : 2001-10-07 DOI: 10.1109/VTC.2001.956585
L. Brunel, D. Mottier
{"title":"Iterative interference cancellation scheme with pilot-aided space-time estimation in DS-CDMA systems","authors":"L. Brunel, D. Mottier","doi":"10.1109/VTC.2001.956585","DOIUrl":"https://doi.org/10.1109/VTC.2001.956585","url":null,"abstract":"Iterative multiuser interference cancellation schemes for direct sequence code division multiple access systems exhibit good performance results for a reasonable complexity. We study an efficient iterative scheme, combining interference cancellation, soft input soft output decoding and beamforming. To deal with unknown channels, we add a pilot-aided space-time channel estimation in each iteration. The iterative structure has two advantages: the observation signal used for estimation contains less interference from one iteration to the following and soft estimates of coded bits are available for data-aided estimation.","PeriodicalId":129008,"journal":{"name":"IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211)","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116273936","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 new model and its performance for TDOA estimation 一种新的TDOA估计模型及其性能
IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211) Pub Date : 2001-10-07 DOI: 10.1109/VTC.2001.957261
L. Zhu, Jinkang Zhu
{"title":"A new model and its performance for TDOA estimation","authors":"L. Zhu, Jinkang Zhu","doi":"10.1109/VTC.2001.957261","DOIUrl":"https://doi.org/10.1109/VTC.2001.957261","url":null,"abstract":"It is well known that the TDOA estimation technique has been widely used in many kinds of location systems, such as radar, sonar and GPS etc. But, because of its serious multipath propagation the cellular location system has much more difficulty in using TDOA than those traditional location-oriented systems mentioned. And so, looking for a new TDOA estimation model and algorithm that is robust and accurate in all kinds of propagation environments is an especially important task for cellular systems. This article combines multipath equalization and identification techniques and proposes a new model and algorithm for TDOA estimation in a cellular positioning system. Theory and computer simulation both prove that a simple estimation algorithm can obtain good estimation results in this model.","PeriodicalId":129008,"journal":{"name":"IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211)","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116610813","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
CDMA downlink system capacity enhancement through generalized RAKE reception 通过广义RAKE接收增强CDMA下行系统容量
IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211) Pub Date : 2001-10-07 DOI: 10.1109/VTC.2001.956961
Y. Wang, G. Bottomley
{"title":"CDMA downlink system capacity enhancement through generalized RAKE reception","authors":"Y. Wang, G. Bottomley","doi":"10.1109/VTC.2001.956961","DOIUrl":"https://doi.org/10.1109/VTC.2001.956961","url":null,"abstract":"The benefit of generalized RAKE reception to downlink system capacity is studied. System capacity is evaluated for certain cell and user outage probabilities. Fast fading, noise correlation, power control, and soft handoff are all included in our study. The site selection diversity transmission (SSDT) approach to power allocation between soft handoff links is shown to be optimal in the sense that it minimizes total transmit power to a given user. Numerical results show that G-RAKE receivers can improve system capacity by as much as 30-45% in a highly dispersive channel.","PeriodicalId":129008,"journal":{"name":"IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211)","volume":"29 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116700646","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: 10
Security enhancements in AODV protocol for wireless ad hoc networks 无线自组织网络的AODV协议的安全性增强
IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211) Pub Date : 2001-10-07 DOI: 10.1109/VTC.2001.957123
S. Bhargava, D. Agrawal
{"title":"Security enhancements in AODV protocol for wireless ad hoc networks","authors":"S. Bhargava, D. Agrawal","doi":"10.1109/VTC.2001.957123","DOIUrl":"https://doi.org/10.1109/VTC.2001.957123","url":null,"abstract":"Ad hoc networks are a new generation of networks offering unrestricted mobility without any underlying infrastructure. Primary applications of ad hoc networks are in military, tactical and other security-sensitive operations, where the environment is hostile. Hence, security is a critical issue. Due to the nature of ad hoc networks, conventional security measures cannot be used. New security techniques are essential for a high-survivability network. The performance of the protocol may be severely affected in the presence of compromised nodes that inflict unpredictable and undetectable Byzantine failure. We have identified certain misbehaviors caused by a malicious node to a reactive routing protocol, specifically the ad hoc on-demand distance vector (AODV) protocol. We also discuss the intrusion detection and intrusion prevention model to prevent several identified attacks in the network.","PeriodicalId":129008,"journal":{"name":"IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123878439","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: 141
Channel alternation and rotation for tri-sectored directional antenna cellular systems 三扇形定向天线蜂窝系统的信道交替和旋转
IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211) Pub Date : 2001-10-07 DOI: 10.1109/VTC.2001.956627
V. A. Nguyen, P. Wan, O. Frieder
{"title":"Channel alternation and rotation for tri-sectored directional antenna cellular systems","authors":"V. A. Nguyen, P. Wan, O. Frieder","doi":"10.1109/VTC.2001.956627","DOIUrl":"https://doi.org/10.1109/VTC.2001.956627","url":null,"abstract":"Due to discrete reuse cluster sizes, disjoined and uniformed channel assignment, conventional tri-sectored cellular systems have not taken full advantage of antenna directivities. We present a novel channel alternation and rotation (CAR) scheme to coordinate channel assignment with antenna directivities. In CAR, the cell layout is based on two-tier cell-reuse structure and each cell is allocated one extra channel set for channel alternations and rotations. The extra channel set gives the network designer the flexibility to assign channels according to nearest front lobe interference avoidant strategy to enhance co-channel interference ratio (C/I). CAR allows deployment of smaller, non-integer reuse cluster sizes based on C/I requirements, thus increases frequency reuse efficiency. CAR reuse plans can increase the channel capacity up to 31.25% while still maintain comparable C/I margins. CAR is simple and can be employed in any existing directional antenna system. Therefore, it truly does not impose any additional cost.","PeriodicalId":129008,"journal":{"name":"IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116775821","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
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