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Vehicular Technology Conference Fall 2000. IEEE VTS Fall VTC2000. 52nd Vehicular Technology Conference (Cat. No.00CH37152)最新文献

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A self-calibration algorithm for an asynchronous CDMA-based antenna array 基于异步cdma的天线阵列自校准算法
Vehicular Technology Conference Fall 2000. IEEE VTS Fall VTC2000. 52nd Vehicular Technology Conference (Cat. No.00CH37152) Pub Date : 2000-09-24 DOI: 10.1109/VETECF.2000.883301
C. Lee, J. Chun
{"title":"A self-calibration algorithm for an asynchronous CDMA-based antenna array","authors":"C. Lee, J. Chun","doi":"10.1109/VETECF.2000.883301","DOIUrl":"https://doi.org/10.1109/VETECF.2000.883301","url":null,"abstract":"A new iterative calibration algorithm for an asynchronous CDMA-based antenna array in the presence of unknown gain and phase errors is presented. The algorithm is applicable to a nonuniform array where the number of users could be greater than the number of antennas, and does not require a prior knowledge of the DOAs of the signals of any user. The method requires the code sequence of a reference user only. The proposed algorithm provides us with the joint estimates of the spatial signature and the channel impulse response of the used signal sources as well as the calibration of the sensor gains and phases, even under multiple access interference. The algorithm is near-far resistant and thus well suited for the multipath fading channel.","PeriodicalId":186198,"journal":{"name":"Vehicular Technology Conference Fall 2000. IEEE VTS Fall VTC2000. 52nd Vehicular Technology Conference (Cat. No.00CH37152)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130144827","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
Uplink acquisition of synchronization parameters in MC-CDMA systems MC-CDMA系统中同步参数的上行采集
Vehicular Technology Conference Fall 2000. IEEE VTS Fall VTC2000. 52nd Vehicular Technology Conference (Cat. No.00CH37152) Pub Date : 2000-09-24 DOI: 10.1109/VETECF.2000.883248
F. Bader, S. Zazo, J.M. Paez Borrallo
{"title":"Uplink acquisition of synchronization parameters in MC-CDMA systems","authors":"F. Bader, S. Zazo, J.M. Paez Borrallo","doi":"10.1109/VETECF.2000.883248","DOIUrl":"https://doi.org/10.1109/VETECF.2000.883248","url":null,"abstract":"Most of the current synchronization schemes used for the forward/downlink MC-CDMA (multi-carrier code division multiple access) systems are not suitable for the reverse/uplink case. The technique proposed gives a new way to estimate the time-frequency synchronization parameters in an uplink MC-CDMA system, with the consideration that all the users reach the base station in an asynchronous mode. The proposed scheme combines the CDMA insertion mode for different spreading codes for all the users, and the SS-MC-MA (spread spectrum multi-carrier multiple access) mode as an insertion technique for the offset correction sequences. The insertion of pilots and offset correction sequences for each user are located at different carriers and obey to the non-overlapping principle with the rest of the user's position.","PeriodicalId":186198,"journal":{"name":"Vehicular Technology Conference Fall 2000. IEEE VTS Fall VTC2000. 52nd Vehicular Technology Conference (Cat. No.00CH37152)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128912446","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
Effects of adaptive equalization on the performance of broadband wireless communications 自适应均衡对宽带无线通信性能的影响
Vehicular Technology Conference Fall 2000. IEEE VTS Fall VTC2000. 52nd Vehicular Technology Conference (Cat. No.00CH37152) Pub Date : 2000-09-24 DOI: 10.1109/VETECF.2000.886670
A. Semmar, H. Huynh, M. Lecours
{"title":"Effects of adaptive equalization on the performance of broadband wireless communications","authors":"A. Semmar, H. Huynh, M. Lecours","doi":"10.1109/VETECF.2000.886670","DOIUrl":"https://doi.org/10.1109/VETECF.2000.886670","url":null,"abstract":"The performance of wireless wideband high data rate indoor communications systems is affected by the channel propagation conditions. In this context, the channel delay profile characteristics constitute a significant constraint by imposing an irreducible error rate which results in a limitation of the transmission rate. We examine the effects of equalization techniques on the performance of broadband wireless communications with CQPSK modulation. Although general in nature, this study is carried out in the context of its application to high data rare wideband transmission at millimeter-wave frequencies. The performance results are based on Monte Carlo simulations with a simplified model of the generated received signal which depend on the power delay profile characteristics. Two power delay profile models are considered: a one sided exponential model and a uniform model. Simulations results show that the relative performance of linear and non-linear equalization techniques strongly depends on the characteristics of the power delay profile model.","PeriodicalId":186198,"journal":{"name":"Vehicular Technology Conference Fall 2000. IEEE VTS Fall VTC2000. 52nd Vehicular Technology Conference (Cat. No.00CH37152)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130677867","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 equalization and decoding with channel shortening filters for space-time coded modulation 基于信道缩短滤波器的空时编码调制迭代均衡与译码
Vehicular Technology Conference Fall 2000. IEEE VTS Fall VTC2000. 52nd Vehicular Technology Conference (Cat. No.00CH37152) Pub Date : 2000-09-24 DOI: 10.1109/VETECF.2000.886095
G. Bauch, N. Al-Dhahir
{"title":"Iterative equalization and decoding with channel shortening filters for space-time coded modulation","authors":"G. Bauch, N. Al-Dhahir","doi":"10.1109/VETECF.2000.886095","DOIUrl":"https://doi.org/10.1109/VETECF.2000.886095","url":null,"abstract":"We consider space-time trellis coded modulation in frequency selective channels. We discuss the outage capacity of space-time trellis coded modulation compared to the capacity of the underlying MIMO channel. Furthermore, we derive FIR channel shortening filters which are used as pre-filters for turbo equalization in order to reduce the number of equalizer states. We show that we can compensate for part of the performance loss due to channel shortening by turbo iterations and a transformation of time diversity to a form of spatial diversity.","PeriodicalId":186198,"journal":{"name":"Vehicular Technology Conference Fall 2000. IEEE VTS Fall VTC2000. 52nd Vehicular Technology Conference (Cat. No.00CH37152)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130992523","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: 21
Multi-channel (blind) equalization for TDMA cellular systems using decision feedback filter 基于决策反馈滤波器的TDMA多通道(盲)均衡
Vehicular Technology Conference Fall 2000. IEEE VTS Fall VTC2000. 52nd Vehicular Technology Conference (Cat. No.00CH37152) Pub Date : 2000-09-24 DOI: 10.1109/VETECF.2000.886829
Young-Hoon Kim, K. Chang
{"title":"Multi-channel (blind) equalization for TDMA cellular systems using decision feedback filter","authors":"Young-Hoon Kim, K. Chang","doi":"10.1109/VETECF.2000.886829","DOIUrl":"https://doi.org/10.1109/VETECF.2000.886829","url":null,"abstract":"Space-time processing using antenna arrays is a promising approach for improving quality, coverage, and capacity in digital cellular communication systems. A (blind) adaptive multi-channel equalizer for decision feedback filter combined with semi-blind channel estimation is proposed effectively to mitigate co-channel and intersymbol interference in a TDMA cellular phone system such as GSM and IS-136 TDMA systems only using the training sequence of the desired user under time varying channel situation. In our scheme, the channels are estimated using training sequence in every slots and used as initial values for the proposed sub-optimal multi-user receiver to mitigate the slowly fading frequency selective multipath channels and co-channel interference. Simulation shows effectiveness of this scheme.","PeriodicalId":186198,"journal":{"name":"Vehicular Technology Conference Fall 2000. IEEE VTS Fall VTC2000. 52nd Vehicular Technology Conference (Cat. No.00CH37152)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131321766","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
Applying splitting algorithms to channel allocation problems-parameter selection 分割算法在信道分配问题中的应用——参数选择
Vehicular Technology Conference Fall 2000. IEEE VTS Fall VTC2000. 52nd Vehicular Technology Conference (Cat. No.00CH37152) Pub Date : 2000-09-24 DOI: 10.1109/VETECF.2000.886121
Xi Xie, S. Wicker
{"title":"Applying splitting algorithms to channel allocation problems-parameter selection","authors":"Xi Xie, S. Wicker","doi":"10.1109/VETECF.2000.886121","DOIUrl":"https://doi.org/10.1109/VETECF.2000.886121","url":null,"abstract":"A channel allocation problem (CAP) can be divided into smaller problems and be solved without losing much performance using splitting algorithms. However, this requires that adequate partitioning be applied to the problem. Some of the considerations are discussed in this paper. Experimental results are presented for one-dimensional partitioning.","PeriodicalId":186198,"journal":{"name":"Vehicular Technology Conference Fall 2000. IEEE VTS Fall VTC2000. 52nd Vehicular Technology Conference (Cat. No.00CH37152)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125497870","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
Spreading sequence sets with zero and low correlation zone for quasi-synchronous CDMA communication systems 准同步CDMA通信系统的零相关带和低相关带扩频序列集
Vehicular Technology Conference Fall 2000. IEEE VTS Fall VTC2000. 52nd Vehicular Technology Conference (Cat. No.00CH37152) Pub Date : 2000-09-24 DOI: 10.1109/VETECF.2000.886114
Xinmin Deng, P. Fan
{"title":"Spreading sequence sets with zero and low correlation zone for quasi-synchronous CDMA communication systems","authors":"Xinmin Deng, P. Fan","doi":"10.1109/VETECF.2000.886114","DOIUrl":"https://doi.org/10.1109/VETECF.2000.886114","url":null,"abstract":"This paper considers the application of sequences with low correlation zone (LCZ) and zero correlation zone (ZCZ) to quasi-synchronous DS/CDMA communication systems. Several classes of sequences with LCZ and ZCZ are described. Numerical results show that the BER performances of systems using ZCZ sequences and LCZ sequences are comparable with the same number of users and almost the same processing gain. In addition, when the timing error is large, the ZCZ sequences perform better than the LCZ sequences. Analytic results are verified with simulations.","PeriodicalId":186198,"journal":{"name":"Vehicular Technology Conference Fall 2000. IEEE VTS Fall VTC2000. 52nd Vehicular Technology Conference (Cat. No.00CH37152)","volume":"123 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126733174","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
Turbo-coded error control for wireless ATM networks 无线ATM网络的turbo编码误差控制
Vehicular Technology Conference Fall 2000. IEEE VTS Fall VTC2000. 52nd Vehicular Technology Conference (Cat. No.00CH37152) Pub Date : 2000-09-24 DOI: 10.1109/VETECF.2000.886825
J. Kim
{"title":"Turbo-coded error control for wireless ATM networks","authors":"J. Kim","doi":"10.1109/VETECF.2000.886825","DOIUrl":"https://doi.org/10.1109/VETECF.2000.886825","url":null,"abstract":"An error control scheme based on the turbo code is proposed and simulated for wireless ATM networks in a multipath fading channel. The packet error performance is substantially improved by increasing the number of iterations in the turbo decoding process and interleaver length of a turbo encoder. It can be concluded that turbo coding is a very promising technique to effectively control channel errors for wireless ATM networks. The results can be applied to error control schemes for wireless ATM networks.","PeriodicalId":186198,"journal":{"name":"Vehicular Technology Conference Fall 2000. IEEE VTS Fall VTC2000. 52nd Vehicular Technology Conference (Cat. No.00CH37152)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123003994","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
Adaptive antenna algorithms for multimedia communications 多媒体通信中的自适应天线算法
Vehicular Technology Conference Fall 2000. IEEE VTS Fall VTC2000. 52nd Vehicular Technology Conference (Cat. No.00CH37152) Pub Date : 2000-09-24 DOI: 10.1109/VETECF.2000.886868
J. Thompson, R. Tanner
{"title":"Adaptive antenna algorithms for multimedia communications","authors":"J. Thompson, R. Tanner","doi":"10.1109/VETECF.2000.886868","DOIUrl":"https://doi.org/10.1109/VETECF.2000.886868","url":null,"abstract":"This paper presents an investigation into receiver algorithms for multiple transmit and receiver systems. A simulation tool has been developed which uses powerful convolutional coding to optimise performance. A number of candidate receiver algorithms are tested to compare performance and complexity. The results show that space-time trellis coding performs best, but is associated with high complexity. A receiver based on minimum mean squared error beamforming is also found to perform well.","PeriodicalId":186198,"journal":{"name":"Vehicular Technology Conference Fall 2000. IEEE VTS Fall VTC2000. 52nd Vehicular Technology Conference (Cat. No.00CH37152)","volume":"189 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123005353","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
Frame synchronization of turbo coded systems using a list-synchronization technique 采用列表同步技术的turbo编码系统帧同步
Vehicular Technology Conference Fall 2000. IEEE VTS Fall VTC2000. 52nd Vehicular Technology Conference (Cat. No.00CH37152) Pub Date : 2000-09-24 DOI: 10.1109/VETECF.2000.883271
Rashid Howlader, B. D. Woerner
{"title":"Frame synchronization of turbo coded systems using a list-synchronization technique","authors":"Rashid Howlader, B. D. Woerner","doi":"10.1109/VETECF.2000.883271","DOIUrl":"https://doi.org/10.1109/VETECF.2000.883271","url":null,"abstract":"This paper proposes a decoder-assisted frame synchronization methodology for turbo-coded systems using the list-synchronization principle, where the first synchronizer provides a list of potential packet starting positions, and the following synchronizer makes the final decision. The list-synchronization method is composed of a decoder-assisted synchronizer and a standard synchronizer. Several configurations of these concatenated synchronization schemes are introduced for resolving shorter or longer packet delays, where the sync word is encoded with a data packet. The decoder-assisted synchronization module accepts soft-decision feedback from the decoder. The performance of these synchronizers evaluated via simulation.","PeriodicalId":186198,"journal":{"name":"Vehicular Technology Conference Fall 2000. IEEE VTS Fall VTC2000. 52nd Vehicular Technology Conference (Cat. No.00CH37152)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123082819","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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