27th IEEE Vehicular Technology Conference最新文献

An evaluation of the effectiveness of citizen's band radio in the highway safety environment 公路安全环境下市民波段无线电有效性评价

27th IEEE Vehicular Technology Conference Pub Date : 1977-03-16 DOI: 10.1109/VTC.1977.1622420

H. DeFrancesco, J. Renner, R. McPhail

{"title":"An evaluation of the effectiveness of citizen's band radio in the highway safety environment","authors":"H. DeFrancesco, J. Renner, R. McPhail","doi":"10.1109/VTC.1977.1622420","DOIUrl":"https://doi.org/10.1109/VTC.1977.1622420","url":null,"abstract":"This paper describes the operational experiment being performed and the evaluation methodology being employed to measure the effectiveness of CB radio as a means to improve highway safety. The project was funded by the U.S. Department of Transportation/ National Highway Safety Administration(DOT/ NHTSA) [1] and is being performed for DOT/NHTSA by the New York State Police (NYSP) with support from its technical consultant, Advanced Technology Systems, Inc. (ATS). The operational experiment is being conducted in a seven county region in north central New York State which includes the cities of Syracuse, Utica and Watertown. In this region CB radios have been installed in 150 State Police vehicles and 21 base stations. The experiment is measuring response times and is tracking response media being employed in reacting to roadway incidences requiring assistance to the motoring public. The paper contains three sections. The first section describes the design of the experiment and the steps taken to prepare for and conduct the experiment. The second section describes the data collection and processing system designed to handle and evaluate the large quantities of data collected during the experiment. The third section covers the evaluation of the outcomes of the experiment. It describes the parameters measured and the statistical tests used to determine the significance of differences obtained in the parameter values with and without the use of CB radios by the State Police.","PeriodicalId":105804,"journal":{"name":"27th IEEE Vehicular Technology Conference","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129570267","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

Computer simulation of HCMTS 16 channel multiplexer HCMTS 16通道多路复用器的计算机仿真

27th IEEE Vehicular Technology Conference Pub Date : 1977-03-16 DOI: 10.1109/VTC.1977.1622427

A. Johnson

{"title":"Computer simulation of HCMTS 16 channel multiplexer","authors":"A. Johnson","doi":"10.1109/VTC.1977.1622427","DOIUrl":"https://doi.org/10.1109/VTC.1977.1622427","url":null,"abstract":"In the High Capacity Mobile Telephone System (HCMTS) many closely adjacent radio frequency channels are used and for economic reasons it is desirable to multiplex these signals for transmission from a single antenna. The multiplexer used in HCMTS consists of 16 high Q cavity resonators which act as highly selective bandpass filters. These cavity resonators are tied together at their common junction by lengths of transmission line which are three-quarters of a wavelength long at the center frequency of the HCMTS transmit band (880 MHz). The cavity resonators are made of invar to provide temperature stability and are copper plated and gold flashed to provide proper electrical and environmental properties. This multiplexer provides a nominal loss of 3 dB from any input to the output and an isolation of about 20 dB between any input sources. A photograph of a complete multiplexer is shown in Figure 1. Because of the complex nature of this multiplexer and the significant cost of building prototype models, it is most desirable to develop a method for simulating the characteristics of the multiplexer. There are many applications where simulated results are useful including the determination of the optimum loaded Q for the individual cavity resonators, the determination of heat dissipation throughout the device and the study of changes due to temperature variations. A computer simulation for the multiplexer has been developed and will be described along with results in the above areas.","PeriodicalId":105804,"journal":{"name":"27th IEEE Vehicular Technology Conference","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125654502","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

Survey of computer aided dispatching (CAD) 计算机辅助调度(CAD)概述

27th IEEE Vehicular Technology Conference Pub Date : 1977-03-16 DOI: 10.1109/VTC.1977.1622415

R. Fetherston

{"title":"Survey of computer aided dispatching (CAD)","authors":"R. Fetherston","doi":"10.1109/VTC.1977.1622415","DOIUrl":"https://doi.org/10.1109/VTC.1977.1622415","url":null,"abstract":"The key elements of CAD systems are studied to assess the growing importance of digital techniques on the \"dispatching\" activity. This activity consists largely of communications from citizens in distress through a communications center and on to the appropriate Patrol \"unit\". The importance of the communication center \"operator's\" role in this communication link involving telephone two-way radio, and remote data communication must be visualized to understand today's dispatching process. The communications link must provide protection, or help, for any citizen in a \"reasonable\" time even though information is relayed through the operators. The ways are described in which CAD and closely related data communications are being added to the telephone and two-way radio communication links to enhance the \"dispatching\" operation. These additions are also seen to improve the availability of important information to officers operating field \"units\" for both emergency and routine investigation. Within this framework the importance of the role of data transmission in todays operations is estimated. Probably future trends of data enhancement in the dispatching/CAD environment for Public Safety are suggested and the impact upon system design and operation are glimpsed.","PeriodicalId":105804,"journal":{"name":"27th IEEE Vehicular Technology Conference","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1977-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130641074","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 dual-car system for proving ground mileage accumulation tests 用于验证地面里程累积测试的双车系统

27th IEEE Vehicular Technology Conference Pub Date : 1977-03-16 DOI: 10.1109/VTC.1977.1622424

T. Jones, R.F. Ayotte

引用次数: 1

Cascode linear power amplifier 级联线性功率放大器

27th IEEE Vehicular Technology Conference Pub Date : 1977-03-16 DOI: 10.1109/VTC.1977.1622440

J. Salvey

引用次数: 0

Air-fuel control in a microprocessor-based system for improving automobile fuel economy 基于微处理器的空气燃油控制系统提高汽车燃油经济性

27th IEEE Vehicular Technology Conference Pub Date : 1977-03-16 DOI: 10.1109/VTC.1977.1622422

Chung-Hyun Sung, M. F. Crocetti

引用次数: 0

Digital voice considerations for the land-mobile radio services 陆地移动无线电业务的数字话音考虑

27th IEEE Vehicular Technology Conference Pub Date : 1977-03-16 DOI: 10.1109/VTC.1977.1622446

H. M. Sachs

引用次数: 10

A simplified method for calculating UHF base-to-mobile statistical coverage contours over irregular terrain 不规则地形上超高频基对移动统计覆盖等高线的简化计算方法

27th IEEE Vehicular Technology Conference Pub Date : 1977-03-16 DOI: 10.1109/VTC.1977.1622448

W. Kessler, M. J. Wiggins

引用次数: 1

A digitally encoded voice encryption system 一种数字编码的语音加密系统

27th IEEE Vehicular Technology Conference Pub Date : 1977-03-16 DOI: 10.1109/VTC.1977.1622414

R.E. Bailey

引用次数: 1

Total area radio coverage in Orange County, California using the simulcasting technique 使用同步广播技术，覆盖加州奥兰治县的全部无线电区域

27th IEEE Vehicular Technology Conference Pub Date : 1977-03-16 DOI: 10.1109/VTC.1977.1622418

G. Gray

引用次数: 1