Proceedings IEEE 56th Vehicular Technology Conference最新文献_第10页

Modified space-time transmission in DS-CDMA downlink facilitating MISO channel equalization 改进的DS-CDMA下行时空传输，实现MISO信道均衡

Proceedings IEEE 56th Vehicular Technology Conference Pub Date : 2002-12-10 DOI: 10.1109/VETECF.2002.1040739

L. Berger, L. Schumacher

引用次数: 16

A fast maximum-likelihood decoder for convolutional codes 卷积码的快速最大似然解码器

Proceedings IEEE 56th Vehicular Technology Conference Pub Date : 2002-12-10 DOI: 10.1109/VETECF.2002.1040367

J. Feldman, I. Abou-Faycal, M. Frigo

引用次数: 42

Area coverage and capacity enhancement by multihop connection of CDMA cellular network CDMA蜂窝网络多跳连接的区域覆盖和容量增强

Proceedings IEEE 56th Vehicular Technology Conference Pub Date : 2002-12-10 DOI: 10.1109/VETECF.2002.1040645

A. Fujiwara, S. Takeda, H. Yoshino, T. Otsu

{"title":"Area coverage and capacity enhancement by multihop connection of CDMA cellular network","authors":"A. Fujiwara, S. Takeda, H. Yoshino, T. Otsu","doi":"10.1109/VETECF.2002.1040645","DOIUrl":"https://doi.org/10.1109/VETECF.2002.1040645","url":null,"abstract":"In future broadband communication systems, a multi-hop scheme, in which stations between a mobile terminal and a base station relay signal transmissions, seems a promising approach for wide-area coverage and system capacity enhancement. We apply the multi-hop connection scheme to a code division multiple access (CDMA) cellular system and compare its performance to that of a conventional single-hop cellular system. In computer simulations, we assume a packet-based multi-cell environment considering intercell and intracell interference and that every mobile station is equipped with a function for relaying transmission signals. Simulations are performed for the cases where the area coverage cannot be obtained by using only a single-hop connection, and where full area coverage is obtained by a single-hop connection. In the former case, almost 90% of area coverage is obtained when the area coverage by a single hop is approximately 50%. In the latter case, packet arrival ratio is increased by using a multi-hop connection. The degree of improvement, however, is very slight due to interference between signals from base stations and relay stations.","PeriodicalId":162055,"journal":{"name":"Proceedings IEEE 56th Vehicular Technology Conference","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122491258","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: 38

MEWLANA-mobile IP enriched wireless local area network architecture mewlana -移动IP丰富的无线局域网架构

Proceedings IEEE 56th Vehicular Technology Conference Pub Date : 2002-12-10 DOI: 10.1109/VETECF.2002.1040661

Mustafa Ergen, A. Puri

引用次数: 56

Correlation properties for radio channels from multiple base stations to two antennas on a small handheld terminal 小型手持终端上从多个基站到两个天线的无线电信道的相关特性

Proceedings IEEE 56th Vehicular Technology Conference Pub Date : 2002-12-10 DOI: 10.1109/VETECF.2002.1040386

Wim Kotterman, G. F. Pedersen, K. Olesen, P. Eggers

{"title":"Correlation properties for radio channels from multiple base stations to two antennas on a small handheld terminal","authors":"Wim Kotterman, G. F. Pedersen, K. Olesen, P. Eggers","doi":"10.1109/VETECF.2002.1040386","DOIUrl":"https://doi.org/10.1109/VETECF.2002.1040386","url":null,"abstract":"It is generally understood that in Rayleigh fading radio channels, sufficient decorrelation for antenna diversity purposes is found at the mobile at antenna separations larger than about /spl lambda//2. However, it has been indicated that with dissimilar antennas with less separation on a small handset, still good diversity gain can be achieved(Pedersen et al. 1999). We present measurements of correlation properties with two similar antennas on our new small measurement handset (Kotterman et al. 2001) (connected by optic fibre, not by conducting cable) of indoor channels at 2140 MHz, including the user. The set-up is with three base stations (BS) simultaneously in order to simulate interference and macro diversity situations. We measured with two types of antennas, monopoles and patches (separation 0.29/spl lambda/ and 0.16/spl lambda/ resp.) in two buildings (old and modern construction) in two different BS configurations, each with up to twelve test users. At the smallest separation of 0.16/spl lambda/ the power correlation between branches remained below 0.83 for the fast fading (median values around 0.5). On the other hand, the slow fading can be strongly correlated between BSs (median value 0.8).","PeriodicalId":162055,"journal":{"name":"Proceedings IEEE 56th Vehicular Technology Conference","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131609590","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

Design of a fuel cell hybrid tramway 燃料电池混合动力有轨电车的设计

Proceedings IEEE 56th Vehicular Technology Conference Pub Date : 2002-12-10 DOI: 10.1109/VETECF.2002.1040750

S. Gay, M. Ehsani

引用次数: 4

Investigation of battery technologies for the army's hybrid vehicle application 陆军混合动力车辆电池技术应用研究

Proceedings IEEE 56th Vehicular Technology Conference Pub Date : 2002-12-10 DOI: 10.1109/VETECF.2002.1040467

Yimin Gao, M. Ehsani

引用次数: 28

IEEE 802.11 over multi-hop wireless networks: problems and new perspectives 多跳无线网络上的IEEE 802.11:问题和新观点

Proceedings IEEE 56th Vehicular Technology Conference Pub Date : 2002-12-10 DOI: 10.1109/VETECF.2002.1040699

K. Sundaresan, Hung-Yun Hsieh, Raghupathy Sivakumar

引用次数: 104

On the capacity of multi-antenna systems in the presence of Rician fading 存在时域衰落时多天线系统的容量研究

Proceedings IEEE 56th Vehicular Technology Conference Pub Date : 2002-12-10 DOI: 10.1109/VETECF.2002.1040561

S. Jayaweera, H. V. Poor

引用次数: 46

Reduced-complexity I/Q turbo detector for convolutional-coding assisted space-time trellis coding 卷积编码辅助空时栅格编码的低复杂度I/Q turbo检测器

Proceedings IEEE 56th Vehicular Technology Conference Pub Date : 2002-12-10 DOI: 10.1109/VETECF.2002.1040744

B. Yeap, T. Liew, L. Hanzo

{"title":"Reduced-complexity I/Q turbo detector for convolutional-coding assisted space-time trellis coding","authors":"B. Yeap, T. Liew, L. Hanzo","doi":"10.1109/VETECF.2002.1040744","DOIUrl":"https://doi.org/10.1109/VETECF.2002.1040744","url":null,"abstract":"This paper presents a reduced-complexity turbo detector for convolutional-coding aided space-time trellis coded (STTC) schemes. The proposed technique is based on the separate in-phase/quadrature-phase (I/Q) detection principle developed for single-transmitter and single-receiver systems. Essentially, the reduced-complexity I/Q turbo detector (R-TD) decomposes the received signal into its constituent I and Q components and detects these components separately, hence reducing the number of possible signal combinations to be 'tested' by the detector. It is observed that the R-TD is capable of approaching the performance of the full-complexity turbo detector, while achieving a complexity reduction factor of 4.2 for a R = 1/2 , convolutional-coded 4-PSK 4-state STTC system communicating over two-path equal-weight Rayleigh fading channels. The performance of the convolutional-coded STTC schemes is also compared to that of the STTC benchmarker refraining from using channel coding, while maintaining a particular throughput. It was found that the convolutional-coded STTC system achieved a gain of 1.2 dB at BER=10/sup -5/, although at the expense of a significant increase in complexity.","PeriodicalId":162055,"journal":{"name":"Proceedings IEEE 56th Vehicular Technology Conference","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134629804","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