发布求助
文献互助 智能选刊 最新文献

Proceedings of IEEE Vehicular Technology Conference (VTC)最新文献

筛选
英文 中文
FEC, ARQ, and throughput of radio LANs 无线局域网的FEC、ARQ和吞吐量
Proceedings of IEEE Vehicular Technology Conference (VTC) Pub Date : 1994-06-08 DOI: 10.1109/VETEC.1994.345331
J. Whitehead, R. Krishnamoorthy
{"title":"FEC, ARQ, and throughput of radio LANs","authors":"J. Whitehead, R. Krishnamoorthy","doi":"10.1109/VETEC.1994.345331","DOIUrl":"https://doi.org/10.1109/VETEC.1994.345331","url":null,"abstract":"We have studied the impact of error-correction coding on multiple-cell and peer-to-peer packet radio networks employing ALOHA and CSMA medium access control protocols. Our methods included detailed analysis of BER for BPSK in the presence of multiple interfering signals and simple equilibrium models for ALOHA performance in non-fading and fading radio environments. The results predict improvements for modest coding (rate>2/3).<<ETX>>","PeriodicalId":383541,"journal":{"name":"Proceedings of IEEE Vehicular Technology Conference (VTC)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124127259","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
Time dispersion measurements in urban microcellular environments 城市微细胞环境中的时间色散测量
Proceedings of IEEE Vehicular Technology Conference (VTC) Pub Date : 1994-06-08 DOI: 10.1109/VETEC.1994.345148
A. Arowojolu, A. Turkmani, J. D. Parsons
{"title":"Time dispersion measurements in urban microcellular environments","authors":"A. Arowojolu, A. Turkmani, J. D. Parsons","doi":"10.1109/VETEC.1994.345148","DOIUrl":"https://doi.org/10.1109/VETEC.1994.345148","url":null,"abstract":"Time dispersion measurements have been conducted in the urban city centre of Liverpool at 1800 MHz. The measurement setup is based on the swept time-delay cross-correlation technique and has a time-delay resolution of 33 ns. The use of automatic gain control (AGC) circuitry in the RF stage permitted the observation of the spatial variation of the multipath power delay profile and RMS delay spread. The experimental work investigated the dependence of RMS delay spread on base antenna height, gain, downtilt and distance in the LOS and non-LOS regions of the microcell. The results obtained indicate that (a) the RMS delay spread is less than or equal to 520ns/280ns in the LOS/non-LOS regions, (b) that the delay spread increases with antenna height and with the use of a directional antenna but decreases with downtilt. Furthermore, the RMS delay spread results are compared with theoretical results obtained using geometrical optics (GO) and the uniform theory of diffraction (UTD).<<ETX>>","PeriodicalId":383541,"journal":{"name":"Proceedings of IEEE Vehicular Technology Conference (VTC)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127755279","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
Radiowave retransmission in confined areas using radiating cable: theoretical and experimental study 在受限区域使用辐射电缆的无线电波重传:理论和实验研究
Proceedings of IEEE Vehicular Technology Conference (VTC) Pub Date : 1994-06-08 DOI: 10.1109/VETEC.1994.345229
M. Liénard, P. Mariage, J. Vandamme, P. Degauque
{"title":"Radiowave retransmission in confined areas using radiating cable: theoretical and experimental study","authors":"M. Liénard, P. Mariage, J. Vandamme, P. Degauque","doi":"10.1109/VETEC.1994.345229","DOIUrl":"https://doi.org/10.1109/VETEC.1994.345229","url":null,"abstract":"After a brief description of the theoretical approach to compute the field radiated by a leaky coaxial cable, examples are given to point out the influence of the tunnel walls on the electric field variation along the cable. The time domain response is then described together with experimental results.<<ETX>>","PeriodicalId":383541,"journal":{"name":"Proceedings of IEEE Vehicular Technology Conference (VTC)","volume":"179 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129032130","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
Phase noise in low bit rate transportable Ka band satellite terminals 低比特率可移动Ka波段卫星终端中的相位噪声
Proceedings of IEEE Vehicular Technology Conference (VTC) Pub Date : 1994-06-08 DOI: 10.1109/VETEC.1994.345083
L. Nagurney
{"title":"Phase noise in low bit rate transportable Ka band satellite terminals","authors":"L. Nagurney","doi":"10.1109/VETEC.1994.345083","DOIUrl":"https://doi.org/10.1109/VETEC.1994.345083","url":null,"abstract":"The development of low bit rate terminals for use with wide bandwidth Ka band transponders, such as ACTS, has forced a reconsideration of phase noise and how it effects low bit rate systems. In this paper we initially calculate the cumulative effect of the phase noise contributions from the oscillators in the ground based transmitter, satellite transponder, and the ground based receiver. We will discuss the cases where the carrier power-to-phase noise power ratio is much larger and much smaller than the carrier power-to-noise/interference power ratio. We extend our results to the case of non-white phase noise spectrum and compare with actual oscillator spectra. We also will discuss complications arising from the fact that one cannot change the phase noise characteristics of the spacecraft. We conclude by illustrating how these analyses can be used to predict the increase in error probability due to phase noise.<<ETX>>","PeriodicalId":383541,"journal":{"name":"Proceedings of IEEE Vehicular Technology Conference (VTC)","volume":"292 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133691984","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
Integration of satellite systems and services within third generation mobile systems such as UMTS and FPLMTS 在诸如UMTS和FPLMTS等第三代移动系统内集成卫星系统和服务
Proceedings of IEEE Vehicular Technology Conference (VTC) Pub Date : 1994-06-08 DOI: 10.1109/VETEC.1994.345112
D. McFarlane
{"title":"Integration of satellite systems and services within third generation mobile systems such as UMTS and FPLMTS","authors":"D. McFarlane","doi":"10.1109/VETEC.1994.345112","DOIUrl":"https://doi.org/10.1109/VETEC.1994.345112","url":null,"abstract":"Third generation mobile systems as typified by UMTS and FPLMTS will have an integrated satellite component. This paper discusses some of the issues which must be addressed in such integration in a global multi-operator environment having a wide variety of regulatory regimes.<<ETX>>","PeriodicalId":383541,"journal":{"name":"Proceedings of IEEE Vehicular Technology Conference (VTC)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130508534","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
Performance evaluation of a multiple-cell CDMA radio system 多小区CDMA无线电系统的性能评价
Proceedings of IEEE Vehicular Technology Conference (VTC) Pub Date : 1994-06-08 DOI: 10.1109/VETEC.1994.345171
Sathy Sathyendran, K. Sowerby, M. Shafi
{"title":"Performance evaluation of a multiple-cell CDMA radio system","authors":"Sathy Sathyendran, K. Sowerby, M. Shafi","doi":"10.1109/VETEC.1994.345171","DOIUrl":"https://doi.org/10.1109/VETEC.1994.345171","url":null,"abstract":"A statistical method for evaluating the performance measures of the base to mobile link of a multiple-cell CDMA system is presented. Specifically, techniques and expressions for estimating the short term average bit-error-rate (BER), service reliability and link availability are developed. The link performance is estimated for a mobile at the vertex of multiple adjacent cells. In the analysis, the system is assumed to employ coherent BPSK modulation and direct sequence spreading and the received signals are assumed to undergo Rayleigh fading, log-normal shadowing and frequency selective fading. The effects of power control and error correction are also investigated.<<ETX>>","PeriodicalId":383541,"journal":{"name":"Proceedings of IEEE Vehicular Technology Conference (VTC)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131263541","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
Adaptive equalization techniques for moderately fading mountainous terrain scenarios 中等衰落山地地形情景的自适应均衡技术
Proceedings of IEEE Vehicular Technology Conference (VTC) Pub Date : 1994-06-08 DOI: 10.1109/VETEC.1994.345129
Klaus-Jürgen Koch, M. Antweiler
{"title":"Adaptive equalization techniques for moderately fading mountainous terrain scenarios","authors":"Klaus-Jürgen Koch, M. Antweiler","doi":"10.1109/VETEC.1994.345129","DOIUrl":"https://doi.org/10.1109/VETEC.1994.345129","url":null,"abstract":"In mountainous propagation scenarios for digital mobile radio communications with moderate fading and with rapidly changing channel characteristics adaptive equalization concepts must be applied to achieve a sufficient low bit error rate in the demodulator. It is shown that the decision feedback equalizer (DFE) with its coefficients derived from the estimation of the channel impulse response yields a better performance with less implementation complexity than the recursive least squares (RLS) lattice equalizer which directly adapts its coefficients.<<ETX>>","PeriodicalId":383541,"journal":{"name":"Proceedings of IEEE Vehicular Technology Conference (VTC)","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134190768","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
TX selection diversity with prediction: systematic nonadaptive predictor design 带预测的TX选择多样性:系统的非自适应预测器设计
Proceedings of IEEE Vehicular Technology Conference (VTC) Pub Date : 1994-06-08 DOI: 10.1109/VETEC.1994.345292
A. Wittneben, T. Kaltenschnee
{"title":"TX selection diversity with prediction: systematic nonadaptive predictor design","authors":"A. Wittneben, T. Kaltenschnee","doi":"10.1109/VETEC.1994.345292","DOIUrl":"https://doi.org/10.1109/VETEC.1994.345292","url":null,"abstract":"In a time division duplex personal communications system uplink and downlink use different time slots on the same carrier. This makes transmit antenna selection diversity possible to combat performance loss in slow fading channels. The best transmit antenna is selected on the basis of signal measurements in preceding receive time slots. Previously proposed selection algorithms have poor performance, if the signal measurements are corrupted by noise. The structure of the optimum selection algorithm for noisy coherent signal measurements is reviewed. It involves an adaptive linear predictor. The design of an optimum nonadaptive predictor is described and the error performance of a system with DECT-like parameters is given. Almost the full diversity gain can be maintained for mobile speeds up to 12 km/h.<<ETX>>","PeriodicalId":383541,"journal":{"name":"Proceedings of IEEE Vehicular Technology Conference (VTC)","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134377081","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: 8
The Walkstation transceiver design Walkstation收发器设计
Proceedings of IEEE Vehicular Technology Conference (VTC) Pub Date : 1994-06-08 DOI: 10.1109/VETEC.1994.345085
D. Kerek, H. Tenhunen, Gerald Q. Maguire, F. Reichert
{"title":"The Walkstation transceiver design","authors":"D. Kerek, H. Tenhunen, Gerald Q. Maguire, F. Reichert","doi":"10.1109/VETEC.1994.345085","DOIUrl":"https://doi.org/10.1109/VETEC.1994.345085","url":null,"abstract":"The design of flexible and efficient future mobile communication systems is a major challenge. The Walkstation Project involves researchers from different areas in order to find a solution via a global system approach. An important task is the investigation of new digital, highly integrated radio interfaces with low cost, small size and low power consumption based on direct sequence CDMA. The simplicity of the design of both the analog and digital parts will allow low power operation and small area in a eventual BiCMOS implementation.<<ETX>>","PeriodicalId":383541,"journal":{"name":"Proceedings of IEEE Vehicular Technology Conference (VTC)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133078493","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
Optimum multi-layered cell architecture for personal communication systems with high degree of mobility 高移动性个人通信系统的最佳多层蜂窝结构
Proceedings of IEEE Vehicular Technology Conference (VTC) Pub Date : 1994-06-08 DOI: 10.1109/VETEC.1994.345049
K. Ogawa, T. Hattori, H. Yoshida
{"title":"Optimum multi-layered cell architecture for personal communication systems with high degree of mobility","authors":"K. Ogawa, T. Hattori, H. Yoshida","doi":"10.1109/VETEC.1994.345049","DOIUrl":"https://doi.org/10.1109/VETEC.1994.345049","url":null,"abstract":"The paper presents a multi-layer structure for personal communications services (PCS). An evaluation is shown for low and high mobility of PCS in terms of cost economy, capacity and spectrum usage. It is supposed that the service area with 30 km radius is covered by a multiple micro cells in the low mobility plane, while the high-mobility plane employs macro cells. Two type of traffic shape are assumed; uniform and exponentially tapered traffic. It is shown that each plane has the optimum cell radius for the prescribed subscriber numbers. Therefore it is desirable to integrate the two systems for the support of full mobility.<<ETX>>","PeriodicalId":383541,"journal":{"name":"Proceedings of IEEE Vehicular Technology Conference (VTC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133078841","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
首页 上一页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信