VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151)最新文献_第8页

Direct estimation of partial channel impulse response for code acquisition and tracking 用于码采集和跟踪的部分信道脉冲响应的直接估计

VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151) Pub Date : 1998-05-18 DOI: 10.1109/VETEC.1998.686440

S. Moon-Ho Song, Jang-Suk Choi, W. M. Kim, Soo-Won Kim

引用次数: 0

Beam falsing loss in switched-beam smart antenna systems 开关波束智能天线系统中的波束丢失损耗

VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151) Pub Date : 1998-05-18 DOI: 10.1109/VETEC.1998.686397

D. Bevan

引用次数: 0

Power control for diversity reception in time-division duplex CDMA 时分双工 CDMA 分集接收的功率控制

VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151) Pub Date : 1998-05-18 DOI: 10.1109/VETEC.1998.686177

I. Ghauri, R. Knopp

引用次数: 3

Cell coverage determination using optimal detection 利用最优检测确定手机覆盖范围

VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151) Pub Date : 1998-05-18 DOI: 10.1109/VETEC.1998.686420

F. Jaimes-Romero, D. Munoz-Rodriguez

引用次数: 1

Smoothed calculation of interference from an array of cells 平滑计算来自一组单元的干扰

VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151) Pub Date : 1998-05-18 DOI: 10.1109/VETEC.1998.686111

G. Yost, S. Panchapakesan

{"title":"Smoothed calculation of interference from an array of cells","authors":"G. Yost, S. Panchapakesan","doi":"10.1109/VETEC.1998.686111","DOIUrl":"https://doi.org/10.1109/VETEC.1998.686111","url":null,"abstract":"Presents a model developed to calculate the intersystem interference (ISYSI) between two different systems that operate in adjacent areas. The model is simple and employs an integral over a field of interfering sources located with a certain density within the entire area in question. Several parameters have been studied, including distribution of interferers (mobiles/base stations) in the interfering system, area and geometry of the interfering system, and the effects of adding cells to the interfering system. The integral of the source density is normalized to the desired number (and strengths) of the sources. The integral does not have a closed form but the numerical integration is straight forward. The results of this study can be used to define the guard zone between the two adjacent systems. The results are compared with those derived from Vasquaz and Montalvo (1997) and H'mimy and Kilvia (1997). Qualitatively, this method gains in simplicity, allows for not only the real-life irregularity of shape and layout of interfering cells but also for modeling different source densities. The detailed structure of the cells in the field of interferers becomes irrelevant. With this integration technique we average over realistic distributions and movements of the interferers in a manner that yields an approximation at least as good as any other and that allows easy adjustments for changing traffic patterns, calculation of \"worst case\" scenarios, etc. Under the same cell geometries and layout as that described in Vasquaz and Montalvo the results obtained by using the two methods agree closely.","PeriodicalId":335954,"journal":{"name":"VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151)","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132568336","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 path loss formulation for wireless applications considering terrain effects for urban environments 考虑城市环境地形影响的无线应用路径损耗公式

VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151) Pub Date : 1998-05-18 DOI: 10.1109/VETEC.1998.686499

L. Piazzi, Henry L. Bertonj

引用次数: 5

Adaptive algorithm for the multishot matched filtering multiuser detector in a multipath Rayleigh fading environment 多径瑞利衰落环境下多镜头匹配滤波多用户检测器的自适应算法

VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151) Pub Date : 1998-05-18 DOI: 10.1109/VETEC.1998.686510

N.J.M. van Waes, Y. Bar-Ness

{"title":"Adaptive algorithm for the multishot matched filtering multiuser detector in a multipath Rayleigh fading environment","authors":"N.J.M. van Waes, Y. Bar-Ness","doi":"10.1109/VETEC.1998.686510","DOIUrl":"https://doi.org/10.1109/VETEC.1998.686510","url":null,"abstract":"CDMA proves to be an attractive method for multiuser communication due to its potential capacity increase and anti-multipath fading capability. However, its performance is limited by the existence of multiple access interference energy (MAI), which results in the so called near-far problem. To reduce the MAI effect, different decorrelating structures for multiuser detection have been proposed. For the asynchronous case, the \"one-shot decorrelator\" was proposed, based on inversion of the partial correlation matrix, which may however be singular. As an alternative, the so called \"multishot decorrelator\", which does not suffer from the aforementioned singularities, was also suggested. However, both detectors, based on inversion of some matrix, are not robust to errors in users' relative delays. The application of the adaptive \"Bootstrap algorithm\" with the one-shot structure proved to easily handle variation in delay estimates and outperform the decorrelating detector. We propose and compare a Bootstrap algorithm suitable for the multishot matched filtering, multiuser detector in a multipath environment, examine its performance, and compare it to that of other detectors. We also propose the extension of the multishot structure to a multistage receiver, by adding an appropriate canceler.","PeriodicalId":335954,"journal":{"name":"VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151)","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131868430","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: 5

Moisture effects on the penetration loss through exterior building walls 水分对建筑外墙穿透损失的影响

VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151) Pub Date : 1998-05-18 DOI: 10.1109/VETEC.1998.683704

Sung Jin Hong, Kyung Jae Kim, Jeong Rhul Lee, B. S. Park, I. Lu

引用次数: 5

Concatenated coded spreading with coherent demodulation for DS-CDMA DS-CDMA的相干解调级联编码扩展

VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151) Pub Date : 1998-05-18 DOI: 10.1109/VETEC.1998.686088

T. Frey, P. Schramm

引用次数: 6

Combined PAT algorithms for mobile multimedia satellite services 移动多媒体卫星业务的组合PAT算法

VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151) Pub Date : 1998-05-18 DOI: 10.1109/VETEC.1998.686549

M. Holzbock, A. Jahn

{"title":"Combined PAT algorithms for mobile multimedia satellite services","authors":"M. Holzbock, A. Jahn","doi":"10.1109/VETEC.1998.686549","DOIUrl":"https://doi.org/10.1109/VETEC.1998.686549","url":null,"abstract":"Next generation satellite services will offer high capacity links for multimedia applications. Mobile receivers for these future applications will use high gain antennas with a beamwidth of 5 degrees and smaller. These antennas require a precise pointing, acquisition and tracking (PAT) process to steer the antenna exactly towards the satellite direction. The channel characteristics at high frequencies, like fading and shadowing, seriously affect the steering algorithms. In the framework of SECOMS (Satellite EHF Communications for Mobile Multimedia Services) and ABATE (ACTS Broadband Aeronautical Terminal Experiment, both European ACTS projects) several field trials and service demonstrations have been performed for future wideband multimedia satellite services at higher frequency bands (20/30 GHz and 40/50 GHz). These experiments were performed using high gain antennas with various beamwidth in different scenarios and environments. This paper gives an overview of these experiments and describes the used antenna PAT algorithms. The measured propagation data allows the implementation of the effects of the land mobile satellite (LMS) channel in a detailed antenna pointing simulator.","PeriodicalId":335954,"journal":{"name":"VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134257846","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