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Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324)最新文献

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High integrity wireless communications over a channel exhibiting severe multi-path propagation 在显示严重多径传播的信道上进行的高完整性无线通信
Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324) Pub Date : 1999-09-19 DOI: 10.1109/VETECF.1999.798623
A. Kemp, A. R. Phillips, J. Orriss, S. Barton
{"title":"High integrity wireless communications over a channel exhibiting severe multi-path propagation","authors":"A. Kemp, A. R. Phillips, J. Orriss, S. Barton","doi":"10.1109/VETECF.1999.798623","DOIUrl":"https://doi.org/10.1109/VETECF.1999.798623","url":null,"abstract":"As a means of attaining high data integrity, triple spatial diversity can be provided on a code division multiple access (CDMA) system but the consequential impact of this on system capacity is unknown. This paper introduces a quantification of this problem and provides some interesting and perhaps surprising results. It also examines some methods for providing a solution.","PeriodicalId":355729,"journal":{"name":"Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324)","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129328020","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
Traffic scheduling and fairness for GPRS air interface GPRS空中接口的流量调度与公平性
Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324) Pub Date : 1999-09-19 DOI: 10.1109/VETECF.1999.798446
D. Calin, S. Malik, D. Zeghlache
{"title":"Traffic scheduling and fairness for GPRS air interface","authors":"D. Calin, S. Malik, D. Zeghlache","doi":"10.1109/VETECF.1999.798446","DOIUrl":"https://doi.org/10.1109/VETECF.1999.798446","url":null,"abstract":"Potential traffic policies are investigated to handle efficiently the bursty nature of data applications as envisaged in General Packet Radio Service (GPRS), a new packet oriented data service for GSM networks. The study is conducted to assess the uplink capacity of the GPRS system which is optimized for various system parameters. Different performance measures such as blocking, frame delay, system throughput and frame loss probability are evaluated.","PeriodicalId":355729,"journal":{"name":"Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129349003","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: 7
Comparing frequency planning against 1/spl times/3 and 1/spl times/1 re-use in real frequency hopping networks 频率规划与实际跳频网络中1/spl倍/3和1/spl倍/1复用的比较
Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324) Pub Date : 1999-09-19 DOI: 10.1109/VETECF.1999.801716
U. Rehfuess, K. Ivanov
{"title":"Comparing frequency planning against 1/spl times/3 and 1/spl times/1 re-use in real frequency hopping networks","authors":"U. Rehfuess, K. Ivanov","doi":"10.1109/VETECF.1999.801716","DOIUrl":"https://doi.org/10.1109/VETECF.1999.801716","url":null,"abstract":"On the one hand, the potential of radio link control options like frequency hopping, power control and discontinuous transmission for capacity increase in GSM mobile radio networks has been extensively studied by several authors using computer simulations in homogeneous hexagonal networks. Unfortunately, some idealistic assumptions on these network models have a substantial drawback on the practical relevance of the simulation results. On the other hand, many field trials and regular network operation have proven very good results in terms of both network quality and capacity when applying radio link options in tight frequency re-use. But there, systematic investigations are hardly feasible. Therefore, we present results of close-to-reality simulations of FH networks showing that FH, PC and DTX can largely improve system capacity in real non-homogeneous networks by as much as 200%. We systematically investigate both advanced frequency assignments at varying re-use and frequency assignments in cluster 1/spl times/3 and 1/spl times/1. Our results reveal some aspects contrasting widely spread views on implementing FH in real networks. From our investigations we deduct recommendations concerning the optimum approach of using frequency hopping, power control and discontinuous transmission in GSM networks.","PeriodicalId":355729,"journal":{"name":"Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127354838","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
An adaptive logical link control for wireless Internet service in ITS 智能交通系统中无线互联网服务的自适应逻辑链路控制
Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324) Pub Date : 1999-09-19 DOI: 10.1109/VETECF.1999.797331
Chi-Hyun Park, D. Cho
{"title":"An adaptive logical link control for wireless Internet service in ITS","authors":"Chi-Hyun Park, D. Cho","doi":"10.1109/VETECF.1999.797331","DOIUrl":"https://doi.org/10.1109/VETECF.1999.797331","url":null,"abstract":"DSRC (dedicated short range communications), which is a radio mobile communication protocol in ITS (intelligent transport system), is suited for traffic related services. Considering the current trends to introduce wireless Internet service into the mobile communication network, wireless Internet service in the ITS system will be valuable. An adaptive logical link control algorithm to support the wireless Internet Web service in DSRC based on the reliable high speed data transmission is proposed and it is shown that an enhanced performance could be obtained compared with the DSRC logical link control algorithms proposed by Europe and Japan.","PeriodicalId":355729,"journal":{"name":"Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130165652","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
Block turbo coded burst-by-burst adaptive radial basis function decision feedback equaliser assisted modems 分组turbo编码突发自适应径向基函数决策反馈均衡器辅助调制解调器
Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324) Pub Date : 1999-09-19 DOI: 10.1109/VETECF.1999.801567
M. Yee, T. Liew, L. Hanzo
{"title":"Block turbo coded burst-by-burst adaptive radial basis function decision feedback equaliser assisted modems","authors":"M. Yee, T. Liew, L. Hanzo","doi":"10.1109/VETECF.1999.801567","DOIUrl":"https://doi.org/10.1109/VETECF.1999.801567","url":null,"abstract":"A novel adaptive modem scheme is presented for transmissions over wideband mobile channels, which employs a radial basis function (RBF) based decision feedback equaliser, in order to mitigate the effects of the dispersive wideband channel. Turbo codes are invoked for improving the bit error rate (BER) and bits per symbol (BPS) performance of the scheme, which is shown to give a significant improvement in terms of mean BPS performance compared to that of the uncoded RBF equaliser assisted adaptive modem.","PeriodicalId":355729,"journal":{"name":"Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131036413","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: 16
Short range motorway communications using a dual-signal receiver 使用双信号接收器的短程高速公路通信
Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324) Pub Date : 1999-09-19 DOI: 10.1109/VETECF.1999.798429
Han Reijmers, G. Janssen, R. Prasad
{"title":"Short range motorway communications using a dual-signal receiver","authors":"Han Reijmers, G. Janssen, R. Prasad","doi":"10.1109/VETECF.1999.798429","DOIUrl":"https://doi.org/10.1109/VETECF.1999.798429","url":null,"abstract":"This paper evaluates the performance of a dual-signal receiver (DSR) when used for short-range communications on a motorway. Vehicles send small packets with equal transmitting power to a base station near the motorway using the slotted Aloha protocol. The positions of the vehicles are derived from real vehicle measurements. The measurements are split into three traffic conditions: queuing traffic with low vehicle speeds, heavy traffic with small average headway's, and light traffic. A DSR is used, and compared with a capture receiver. Success probabilities are calculated using a free space power loss model and Rice distribution. The success probabilities are used to analyse the throughput and delay characteristics for the slotted Aloha protocol in the uplink data stream, under different traffic conditions. The results show that the DSR benefits from the near-far effect. The total throughput for all vehicles is significantly higher than for the capture receiver.","PeriodicalId":355729,"journal":{"name":"Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130291193","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
A video transmission system based on human visual model 基于人眼视觉模型的视频传输系统
Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324) Pub Date : 1999-09-19 DOI: 10.1109/VETECF.1999.798453
Y. Jiang, J. Gu, J. Baras
{"title":"A video transmission system based on human visual model","authors":"Y. Jiang, J. Gu, J. Baras","doi":"10.1109/VETECF.1999.798453","DOIUrl":"https://doi.org/10.1109/VETECF.1999.798453","url":null,"abstract":"This paper presents a joint source-channel coding scheme of digital video broadcasting over a satellite channel. The video compression is based on the human visual model. The perceptual distortion model, the just-noticeable-distortion (JND), is applied to improve the subjective quality of compressed videos. The 3-D wavelet decomposition can remove spatial and temporal redundancy and provide scalability of the video quality. In order to conceal the errors which occurred under bad channel conditions, a novel slicing method and a joint source channel coding scenario that combines rate compatible punctured convolutional (RCPC) codes with cyclic redundancy check (CRC) and utilizes the distortion information to allocate convolutional coding rates are presented. A new performance index based on the JND is proposed and used to evaluate the overall performance at different signal-to-noise ratios (SNR). Our system uses the OQPSK modulation scheme.","PeriodicalId":355729,"journal":{"name":"Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130475894","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
A new protocol and a new approach towards analysing the performance of medium access control protocols for wireless LANs 一种分析无线局域网介质访问控制协议性能的新协议和新方法
Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324) Pub Date : 1999-09-19 DOI: 10.1109/VETECF.1999.801592
A. R. Phillips, J. Orriss, S. Barton
{"title":"A new protocol and a new approach towards analysing the performance of medium access control protocols for wireless LANs","authors":"A. R. Phillips, J. Orriss, S. Barton","doi":"10.1109/VETECF.1999.801592","DOIUrl":"https://doi.org/10.1109/VETECF.1999.801592","url":null,"abstract":"This paper introduces a new protocol which is based on the standard RTS/CTS exchange with a spread-spectrum contention resolution phase and an unspread, high rate, data phase. The benefit of this asymmetric signalling is that stations defer only for a possible collision with data, not for one with other signalling packets. This strategy is expected to increase throughput on a data-per-area basis compared with conventional protocols such as HIPERLAN and 802.11. A new method of analysis is also presented which lends itself towards simulation as it facilitates the use of relative distances (or losses) which include a shadowing effect. Finally some preliminary results are presented.","PeriodicalId":355729,"journal":{"name":"Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127921418","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
A combination of multiple turbo codes and multiple antennas with a reduced iterative decoder for DS-CDMA systems 用于DS-CDMA系统的多turbo码和多天线的组合，具有简化的迭代解码器
Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324) Pub Date : 1999-09-19 DOI: 10.1109/VETECF.1999.801566
Hayoung Yang, Dae-Ki Hong, Youngsoo Yuk, C. Kang
{"title":"A combination of multiple turbo codes and multiple antennas with a reduced iterative decoder for DS-CDMA systems","authors":"Hayoung Yang, Dae-Ki Hong, Youngsoo Yuk, C. Kang","doi":"10.1109/VETECF.1999.801566","DOIUrl":"https://doi.org/10.1109/VETECF.1999.801566","url":null,"abstract":"In this paper a combined multiple turbo codes and multiple antenna diversity scheme for synchronous DS/CDMA systems over mobile radio fading channels is considered to improve the BER performance. In spite of the multiple structures, no time delay and less amount of computation can be achieved by a modified parallel mode decoding process and a reduced MAP algorithm using trellis code structure.","PeriodicalId":355729,"journal":{"name":"Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126238333","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
Permission probability control for service fairness in CDMA slotted-ALOHA systems CDMA槽aloha系统中服务公平性的权限概率控制
Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324) Pub Date : 1999-09-19 DOI: 10.1109/VETECF.1999.798620
K. Mori, T. Kobayashi
{"title":"Permission probability control for service fairness in CDMA slotted-ALOHA systems","authors":"K. Mori, T. Kobayashi","doi":"10.1109/VETECF.1999.798620","DOIUrl":"https://doi.org/10.1109/VETECF.1999.798620","url":null,"abstract":"This paper proposes a permission probability control scheme to reduce unfairness of service depending on the mobile locations in the up-link of CDMA cellular slotted-ALOHA systems with site diversity reception. In the proposed scheme, mobile stations control transmit permission probability based on the reception level of pilot signals from the surrounding base stations. Successful packet reception rate, fairness coefficient and throughput performance are evaluated in fading environments with imperfect power control. Computer simulation shows that the proposed scheme improves the service fairness for all mobile stations and throughput performance.","PeriodicalId":355729,"journal":{"name":"Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324)","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126874215","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
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