Vehicular Technology Conference. IEEE 55th Vehicular Technology Conference. VTC Spring 2002 (Cat. No.02CH37367)最新文献_第6页

Sensitivity of feedback channel delay on transmit adaptive array 发射自适应阵列反馈信道延迟的灵敏度

Vehicular Technology Conference. IEEE 55th Vehicular Technology Conference. VTC Spring 2002 (Cat. No.02CH37367) Pub Date : 2002-08-07 DOI: 10.1109/VTC.2002.1002543

Cheol-Yong Ahn, Jin-Kyu Han, Young-Kwan Choi, Dong Ku Kim

引用次数: 0

Improving chaos equations fading models for Ka band satellite links Ka波段卫星链路混沌方程衰落模型的改进

Vehicular Technology Conference. IEEE 55th Vehicular Technology Conference. VTC Spring 2002 (Cat. No.02CH37367) Pub Date : 2002-08-07 DOI: 10.1109/VTC.2002.1002971

E. Costamagna, L. Favalli, P. Gamba, F. Tarantola

引用次数: 4

Connectionless broadcast channel and mobility of Bluetooth 无连接广播信道和蓝牙的移动性

Vehicular Technology Conference. IEEE 55th Vehicular Technology Conference. VTC Spring 2002 (Cat. No.02CH37367) Pub Date : 2002-08-07 DOI: 10.1109/VTC.2002.1002622

Yongsuk Kim, B. Zhen

{"title":"Connectionless broadcast channel and mobility of Bluetooth","authors":"Yongsuk Kim, B. Zhen","doi":"10.1109/VTC.2002.1002622","DOIUrl":"https://doi.org/10.1109/VTC.2002.1002622","url":null,"abstract":"This paper proposes a new mechanism for Bluetooth connectionless broadcast channel and concept of net access point (NAP) segment. They are used to track location of idle personal area network users (PANU) in power and radio resource save manner. The connectionless broadcast channel is separated into beacon window and broadcast window. During the beacon window, NAP spreads an extended ID packet that includes BD ADDR and clock offset to synchronize all PANU in its radio range. The Extended ID packet is the standard ID packet with extra information field at the end. Then, any user-defined information is released in the broadcast window from NAP to PANU without connection establishment between NAP and PANU. The NAP segment is a set of geography neighbor NAP. When an idle PANU moves within a NAP segment, no handover is needed even when the current connection breaks. When an idle PANU moves across the NAP segment, handover must be performed to register the PANU's location. We present an analysis of PANU mobility with and without the NAP segment to show that the NAP segment can save the radio resources of the NAP and power consumption of the PANU.","PeriodicalId":159750,"journal":{"name":"Vehicular Technology Conference. IEEE 55th Vehicular Technology Conference. VTC Spring 2002 (Cat. No.02CH37367)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114749249","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

Modeling of mobile satellite channels by scalable clustering algorithm 基于可扩展聚类算法的移动卫星信道建模

Vehicular Technology Conference. IEEE 55th Vehicular Technology Conference. VTC Spring 2002 (Cat. No.02CH37367) Pub Date : 2002-08-07 DOI: 10.1109/VTC.2002.1002974

L. Husson, J. Dany, Sylvain Chambon, Karim Berradi, Armando Beffani

引用次数: 7

Delay spread in microcells analysed with waveguide theory 用波导理论分析微蜂窝中的延迟扩散

Vehicular Technology Conference. IEEE 55th Vehicular Technology Conference. VTC Spring 2002 (Cat. No.02CH37367) Pub Date : 2002-08-07 DOI: 10.1109/VTC.2002.1002768

D. Porrat, D. Cox

引用次数: 2

Blind channel estimation and equalization using Viterbi algorithms 使用Viterbi算法的盲信道估计和均衡

Vehicular Technology Conference. IEEE 55th Vehicular Technology Conference. VTC Spring 2002 (Cat. No.02CH37367) Pub Date : 2002-08-07 DOI: 10.1109/VTC.2002.1002873

Lei Cao, C. Chen, P. Orlik, Jinyun Zhang, Daqing Gu

{"title":"Blind channel estimation and equalization using Viterbi algorithms","authors":"Lei Cao, C. Chen, P. Orlik, Jinyun Zhang, Daqing Gu","doi":"10.1109/VTC.2002.1002873","DOIUrl":"https://doi.org/10.1109/VTC.2002.1002873","url":null,"abstract":"In this paper, a trellis based blind channel estimation and equalization technique is presented. First, blind channel estimation is accomplished by incorporating a list parallel Viterbi algorithm with the least mean square (LMS) updating approach. In this operation, multiple trellis mappings are preserved and ranked in terms of path metrics. Equivalently, multiple channel estimates are maintained and updated once a single symbol is received. Second, at a certain point, which is determined by the evolution of path metrics and the linear constraint possessed in the trellis mapping, only the best channel estimate is maintained. Third, this channel estimate is adopted to construct the whole trellis that is used by a conventional adaptive Viterbi algorithm. Signal detection and further channel updating are then conducted alternatively. To alleviate the noise impact, a small delay is introduced before the feedback of detected symbols to further update the channel estimate. Simulation has shown the overall good performance of the proposed scheme in terms of mean square error (MSE) convergence of the channel estimation, stability to the initial channel guess, and computational complexity etc.","PeriodicalId":159750,"journal":{"name":"Vehicular Technology Conference. IEEE 55th Vehicular Technology Conference. VTC Spring 2002 (Cat. No.02CH37367)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116291183","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

Decision-feedback equalization for CDMA downlink CDMA下行链路的决策反馈均衡

Vehicular Technology Conference. IEEE 55th Vehicular Technology Conference. VTC Spring 2002 (Cat. No.02CH37367) Pub Date : 2002-08-07 DOI: 10.1109/VTC.2002.1002601

Jürgen F. Rößler, L. Lampe, W. Gerstacker, J. Huber

引用次数: 17

Performance of single user detectors in multitone multiple access asynchronous communications 多音多址异步通信中单用户检测器的性能

Vehicular Technology Conference. IEEE 55th Vehicular Technology Conference. VTC Spring 2002 (Cat. No.02CH37367) Pub Date : 2002-08-07 DOI: 10.1109/VTC.2002.1002692

A. Tonello, S. Pupolin

引用次数: 40

Combined dynamic channel assignment and non-linear spatial processing for high throughput packet radio 结合动态信道分配和非线性空间处理的高吞吐量分组无线电

Vehicular Technology Conference. IEEE 55th Vehicular Technology Conference. VTC Spring 2002 (Cat. No.02CH37367) Pub Date : 2002-08-07 DOI: 10.1109/VTC.2002.1002596

R. R. Araujo, F. Cavalcanti, J. Mota, B. Dorizzi

引用次数: 0

CDMA satellite capacity dynamics and efficiency with imperfect power control for simultaneous QoS classes and diversity 具有不完全功率控制的CDMA卫星容量动态和效率

Vehicular Technology Conference. IEEE 55th Vehicular Technology Conference. VTC Spring 2002 (Cat. No.02CH37367) Pub Date : 2002-08-07 DOI: 10.1109/VTC.2002.1002970

M. Vázquez-Castro, E. Parrado-Hernández, D. Belay-Zeleke, F. Pérez-Fontán

{"title":"CDMA satellite capacity dynamics and efficiency with imperfect power control for simultaneous QoS classes and diversity","authors":"M. Vázquez-Castro, E. Parrado-Hernández, D. Belay-Zeleke, F. Pérez-Fontán","doi":"10.1109/VTC.2002.1002970","DOIUrl":"https://doi.org/10.1109/VTC.2002.1002970","url":null,"abstract":"We focus on a non-GEO scenario and investigate the effect of actual power control performance on the return capacity dynamics of a DS-CDMA system. We consider mobile users at different speeds and transmission rates yielding several classes of services. We compute analytically the ideal maximum return capacity of the system which is shown not to be fixed but limited by a hyperplane in the space of the considered quality of service (QoS), so that different resource assignment criteria can be applied. At maximum ideal capacity, for the different percentages of users that can be served, it is shown that the more restraining the QoS, the more resources that must be assigned. We then explore the appropriate efficiency of the system, i.e. the actual used resources as a function of the distribution of QoS. We finally look into the inter-beam effect by applying different degrees of diversity gains and we show the trade-off between improving the capacity efficiency which is poor due to power control error and the net capacity achieved by the overall system.","PeriodicalId":159750,"journal":{"name":"Vehicular Technology Conference. IEEE 55th Vehicular Technology Conference. VTC Spring 2002 (Cat. No.02CH37367)","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123998349","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