{"title":"A digital signal processor for high precision non-contact speed measurement of rail-guided vehicles","authors":"J. Bohmann, H. Meyr, G. Spies","doi":"10.1109/VTC.1982.1623057","DOIUrl":"https://doi.org/10.1109/VTC.1982.1623057","url":null,"abstract":"The intention of this paper is to describe the principle, structure and performance of a digital signal processing system to be used for non-contact speed measurement of rail-guided vehicles. The speed and distance measurements are calculated from signals generated by optical sensors as an image of tne rail-surface. These signals are identical except for a time delay which is inversely proportional to tne translation velocity of the vehicle. The combination of a precise optical system and sophisticated digital signal processing algorithms yields a system of very high precision and reliability.","PeriodicalId":230854,"journal":{"name":"32nd IEEE Vehicular Technology Conference","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1982-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124502844","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}
{"title":"Transforming engine maps for ROMBIC","authors":"R. Peterson, A. Robbi","doi":"10.1109/VTC.1982.1623006","DOIUrl":"https://doi.org/10.1109/VTC.1982.1623006","url":null,"abstract":"ROMBIC is a ROM-based digital ignition controller which generates a spark advance as a two-dimensional function of RPM and engine load, or vacuum. Its ROM contains time domain information related to the advance; this enables the controller to have a relatively simple architecture, and to operate in the time domain. The computation of the ROM contents is based upon engineering data for an engine, families of curves of spark advance vs. RPM with vacuum as a parameter. Computer programs which map the angle-degree domain data into the time domain have been developed. The algorithms employed in these programs are outlined.","PeriodicalId":230854,"journal":{"name":"32nd IEEE Vehicular Technology Conference","volume":"247 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1982-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122817512","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}
{"title":"A comparsion of binary paging codes","authors":"J. L. Sandvos","doi":"10.1109/VTC.1982.1623049","DOIUrl":"https://doi.org/10.1109/VTC.1982.1623049","url":null,"abstract":"A comparison of two of the major coding formats for binary paging is presented. Performance of the codes is investigated for both Gaussian noise and Rayleigh fading. An analytical analysis of the stationary pager in a fading field is also presented. For the Gaussian and Rayleigh fading cases, the testing uses a common radio and bit detector as the receiver with either frontend noise or a Rayleigh Fading simulator to simulate the rf channel. A minicomputer is interfaced to both the rf generator and the data output of the bit detector and serves as the source, sink and statistics tabulator for the testing. In addition to alert-only paging, this study investigates the performance of both numeric and alphanumeric paging. A discussion of the implications of the various sensitivity differences is included.","PeriodicalId":230854,"journal":{"name":"32nd IEEE Vehicular Technology Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1982-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130163842","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}
{"title":"\"Electric vehicles are practical with today's technology\"","authors":"V. Wouk","doi":"10.1109/VTC.1982.1622997","DOIUrl":"https://doi.org/10.1109/VTC.1982.1622997","url":null,"abstract":"Electric (battery-powered) automobiles continue to be an elusive practicality. This paper discusses the main reason for the disappointment, namely, the effort to build high performance into an electric car that can travel a long distance before the batteries are depleted, an objective that is inherently impossible with today's battery technology. However, with an infrastructure of electric outlets for charging EV batteries where cars are normally parked, electric automobiles could be introduced rapidly into the population of automobiles with existing technology. The key to the practicality of EVs is to design for the fact that most usage of road vehicles, except buses, taxis and long-haul trucks, is for short trips. When the EV is not being used, the batteries could be charged (a process called biberonnage), if there were networks of electric outlets where vehicles are normally parked. This subject is discussed qualitatively and quantitatively. Examples are given of experimental charging when the EV is not in use, where ranges of 160 km or more per day were obtained. The paper also shows that in most applications of the use of any car, the intervals between the vehicle actually being driven is more than 1/2 hour. This represents an interval long enough to charge the lead batteries sufficiently to drive the EV over 130 km per day. The problem of making EVs practical is political, not economic nor technical.","PeriodicalId":230854,"journal":{"name":"32nd IEEE Vehicular Technology Conference","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1982-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131041647","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}
{"title":"A temperature stabilized RF detector with extended dynamic range","authors":"R. Turner","doi":"10.1109/VTC.1982.1623024","DOIUrl":"https://doi.org/10.1109/VTC.1982.1623024","url":null,"abstract":"The purpose of this paper is to document some of the finer points which became apparent during the development of an RF powermeter. The powermeter, intended for use in a hostile thermal environment, was an integral part of an automated test set used to evaluate mobile telephone units. The initial task was to develop circuitry that produced a DC output voltage which was simply related to the RF input power. The circuit performance was further specified to accommodate a wide dynamic range of inputs and to remain reasonably accurate despite wide temperature variations. The development was begun by employing DC current biasing to improve the detector's sensitivity to low level input signals. Next a subtractive technique was utilized to provide improved temperature stability. An additive technique was devised to extend the range of linear operation. Only by employing all of these methods was the resultant circuit able to meet its requirements. In the sections which follow, the current biased envelope detector with the proposed improvements is discussed, a circuit is introduced, and experimental results which confirm the validity of the suggested techniques are presented.","PeriodicalId":230854,"journal":{"name":"32nd IEEE Vehicular Technology Conference","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1982-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127748428","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}
{"title":"A decentralized control approach for an automated highway system","authors":"R.E. Magee, R. Fenton, L.C. Rakocy","doi":"10.1109/VTC.1982.1623061","DOIUrl":"https://doi.org/10.1109/VTC.1982.1623061","url":null,"abstract":"A partially decentralized control hierarchy for an automated highway system, which involves a post-deterministic synchronous control policy, is presented. This hierarchy is characterized by control flexibility, an efficient distribution of the computational load, minimal communications between wayside and the controlled vehicles, minimal trip time delay and trip time variance, and energy efficiency. It incorporates a \"local\" solution to the most difficult problems -- saturation and conflict resolution at merging junctions -- encountered in normal (nonemergency) operations, and operations could be sustained at lower levels if a higher level(s) were to fail.","PeriodicalId":230854,"journal":{"name":"32nd IEEE Vehicular Technology Conference","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1982-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116842830","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}
{"title":"800 MHz for public safety — Design considerations for conventional systems","authors":"B. Ebstein, G. M. Stone","doi":"10.1109/VTC.1982.1623043","DOIUrl":"https://doi.org/10.1109/VTC.1982.1623043","url":null,"abstract":"Major questions arising in the design of a conventional (i.e., not trunked) public safety 800 MHz land-mobile communication system are discussed. Public safety agencies consider implementing systems in the 800 MHz band because of the difficulty of obtaining channels in the VHF high band and UHF 450-512 MHz bands, because of the excellent coverage available in urban and suburban environments, or for both reasons. Somewhat higher costs in this band are often offset by the advantages cited. Two very different types of systems are described. One is a complex, multi-channel tollroad system that is primarily mobile radio oriented, and is unified through an extensive microwave backbone system. This system serves both police and tollroad maintenance, engineering and administrative functions. The other is a municipal police and fire system with channels to serve both dispatch operations of the two departments and other functions such as fire ground, detective and administrative users. Both the fire ground and police dispatch systems are designed to provide highly reliable portable radio coverage over the entire jurisdiction. For a ribbon type system, such as the tollroad system, the use of the 800 MHz band allows special requirements to be imposed on antenna pattern specifications and on individual channel assignments. The restrictions placed on transmitter power and satellite receiver placement add to the design constraints normally found in such a system. The municipal system design poses the challenge of meeting the diverse requirements of dispatch and tactical communications (such as fire ground and detective message traffic) and portable coverage on both police and fire channels, while providing mobile coverage in a compatible system. Location of base stations and receivers, in light of available transmitter powers and known system losses also requires careful attention. The aspects of 800 MHz system design for conventional, public safety systems that are unique to these situations are presented and discussed. They include ERP limitations, antenna patterns available, and licensing requirements, as well as special consideration needed to produce competitive bid specifications in a market in which not every equipment feature or type is available from every supplier. Many of the design considerations discussed for public safety systems are equally applicable to business and industrial users of 800 MHz systems.","PeriodicalId":230854,"journal":{"name":"32nd IEEE Vehicular Technology Conference","volume":"108 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1982-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134375654","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}
{"title":"Meeting the challenge of limited resources — In the allocations of the radio spectrum for use by the public safety radio services","authors":"R. E. Brooking","doi":"10.1109/VTC.1982.1623014","DOIUrl":"https://doi.org/10.1109/VTC.1982.1623014","url":null,"abstract":"This paper begins with the allocations of the radio spectrum under Docket 6651; the discovery after just three years that the Land Mobile Radio Services were already in need of more frequencies for operating their radio systems. Starting in 1951 the Joint Technical Advisory Committee (JTAC) worked \"under great pressure\" to find a solution and in 1953 it presented a report to the FCC supporting channel splitting in the 152-162 MHz band as a means of providing additional channels. In 1959 the FCC held a Statutory Inquiry into the use of the frequencies between 25 and 890 MHz (Docket 11997). The occupancy of the 800 MHz band continues to grow. New technologies have been implemented.","PeriodicalId":230854,"journal":{"name":"32nd IEEE Vehicular Technology Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1982-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128291756","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}
{"title":"FM radio simulcasting — A systems approach","authors":"S. Maddy","doi":"10.1109/VTC.1982.1623016","DOIUrl":"https://doi.org/10.1109/VTC.1982.1623016","url":null,"abstract":"The past several years the technique of simulcasting (the use of multiple transmitters simultaneously transmitting the same information) has become necessary to satisfy the geographical coverage requirements of large RF transmission systems. It has been found that specially designed equipment is needed to adhere to the stringent requirements of this type of system in order to obtain usable overlap area coverage. It has also been found that a properly designed simulcast RF transmission system has many advantages over a single transmitter even within the same coverage area. In order to develop system design guidelines a set of laboratory tests were devised to determine the parameters required for an acceptable system. A system audio processing scheme was then devised that would implement the system and conform to the design guidelines obtained from the laboratory tests. In this paper I will describe these laboratory tests and show the results. The audio processing scheme that was then used is described as well as several other system design considerations. Lastly, the advantages of implementing a transmission system using simulcasting techniques is discussed.","PeriodicalId":230854,"journal":{"name":"32nd IEEE Vehicular Technology Conference","volume":"690 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1982-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133801551","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}