34th IEEE Vehicular Technology Conference最新文献_第4页

Voice input for automobiles using a new method of feature extraction 基于特征提取的汽车语音输入新方法

34th IEEE Vehicular Technology Conference Pub Date : 1984-05-21 DOI: 10.1109/VTC.1984.1623258

P. Andreas, M. Junge

引用次数: 0

Carrier sense multiple access with collision detection for FH/FSK spread spectrum mobile packet radio networks 基于碰撞检测的FH/FSK扩频移动分组无线网络载波感知多址

34th IEEE Vehicular Technology Conference Pub Date : 1984-05-21 DOI: 10.1109/VTC.1984.1623253

R. Sinha, S. C. Gupta

引用次数: 13

Autonomous decentralization concept and its application to railway control systems 自治分散概念及其在铁路控制系统中的应用

34th IEEE Vehicular Technology Conference Pub Date : 1984-05-21 DOI: 10.1109/VTC.1984.1623272

M. Yabushita, S. Miyamoto, M. Nohmi, K. Mori, H. Ihara, H. Matsumaru, H. Ohshima

引用次数: 3

Leaky-feeder radio communication: A historical review 漏馈式无线电通信:历史回顾

34th IEEE Vehicular Technology Conference Pub Date : 1984-05-21 DOI: 10.1109/VTC.1984.1623231

D.J.R. Martin

引用次数: 30

Medium frequency vehicular control and communication systems for underground mines 井下矿井中频车辆控制与通信系统

34th IEEE Vehicular Technology Conference Pub Date : 1984-05-21 DOI: 10.1109/VTC.1984.1623282

L. Stolarczyk, H. Dobroski

{"title":"Medium frequency vehicular control and communication systems for underground mines","authors":"L. Stolarczyk, H. Dobroski","doi":"10.1109/VTC.1984.1623282","DOIUrl":"https://doi.org/10.1109/VTC.1984.1623282","url":null,"abstract":"Theoretical and experimental research sponsored by the U.S. Bureau of Mines shows that medium frequency (MF) electromagnetic (EM) signals propagate great distances in an underground environment such as a tunnel or mine. This propagation is enhanced by different mechanisms associated with the geology, and with the existence of metallic conductors in the entryways. In stratified geologies, a transverse electromagnetic (TEM) mode of signal propagation is possible if a low conducting layer is bounded above and below by higher conducting layers. In general, the difference in conductivities must be at least several orders of magnitude. Such geological waveguide conditions often exist in underground mines. Propagation via the waveguide effect is known as the \"seam mode\" of propagation. Another mode of propagation, the \"tunnel mode,\" exists in underground entries with electrical conductors such as power cables, metal pipes, and phone lines. A monofilar mode of propagation exists when signals are impressed upon conductors and return via the surrounding rock. A bifilar mode of propagation exists when all signals exist only on local conductors. In a given location there is a combination of monofilar and bifilar modes that make possible an interaction between the conductors and a transmitting device in a tunnel or entryway. Signals can be impressed on or received from local conductors via magnetic dipole antennas (loops) or line couplers.","PeriodicalId":178210,"journal":{"name":"34th IEEE Vehicular Technology Conference","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1984-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123848958","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

An antenna for a portable data terminal 用于便携式数据终端的天线

34th IEEE Vehicular Technology Conference Pub Date : 1984-05-21 DOI: 10.1109/VTC.1984.1623236

O. Garay, Q. Balzano

{"title":"An antenna for a portable data terminal","authors":"O. Garay, Q. Balzano","doi":"10.1109/VTC.1984.1623236","DOIUrl":"https://doi.org/10.1109/VTC.1984.1623236","url":null,"abstract":"A Portable Data Terminal has radiation requirements somewhat different from those of a traditional portable radio. A portable transmitter is normally required to radiate in the hands or on the belt of the user when the operator depresses the Push-To-Talk (PTT) switch. The radiation environment, the objects in the immediate vicinity of the radiator (say less than six inches distant) and the position of the radio with respect to such objects, is predictable. For example, the designer can expect that the radio case will be in the hand of the user, the antenna in front of the face of such person, and that there are a few feet of free space around the head of the user. The user of the radio can be expected to operate the transmitter in such conditions. This is not the case for a portable data terminal whose RF transmissions are controlled not by an operator but by interrogation by a base station. In these conditions, the terminal is required to radiate from inside a briefcase, on a table, on a metal slab, etc. In general, one can see that the terminal is expected to radiate from any position in the close vicinity of conducting or non-conducting surfaces. Traditional portable antennas, e.g., whips and helices, cannot satisfy the condition of radiating efficiently when placed close to and parallel to conducting surfaces.","PeriodicalId":178210,"journal":{"name":"34th IEEE Vehicular Technology Conference","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1984-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121991435","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

Train radio system using leaky coaxial cable 使用泄漏同轴电缆的列车无线电系统

34th IEEE Vehicular Technology Conference Pub Date : 1984-05-21 DOI: 10.1109/VTC.1984.1623234

T. Yuge, S. Sasaki

引用次数: 11

ACSB system design ACSB系统设计

34th IEEE Vehicular Technology Conference Pub Date : 1984-05-21 DOI: 10.1109/VTC.1984.1623244

S. Lapin

引用次数: 0

High performance digital communications in mobile channels 移动信道中的高性能数字通信

34th IEEE Vehicular Technology Conference Pub Date : 1984-05-21 DOI: 10.1109/VTC.1984.1623248

F. Davarian

引用次数: 13

Microwave radio in mines and tunnels 矿井和隧道里的微波收音机

34th IEEE Vehicular Technology Conference Pub Date : 1984-05-21 DOI: 10.1109/VTC.1984.1623232

Q. V. Davis, D.J.R. Martin, R. Haining

引用次数: 8