{"title":"Mobile telephone control unit design guidelines for the high capacity mobile telecommunications system","authors":"J. Walker","doi":"10.1109/VTC.1978.1622509","DOIUrl":"https://doi.org/10.1109/VTC.1978.1622509","url":null,"abstract":"Mobile telephone control unit design guidelines for the High Capacity Mobile Telecommunications System have been developed based on driving behavior, user preference, automobile environment and calling procedure considerations. This paper explains these guidelines and illustrates their application by reviewing five control unit design approaches.","PeriodicalId":264799,"journal":{"name":"28th IEEE Vehicular Technology Conference","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1978-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115145592","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":"Microprocessor control of an electric vehicle","authors":"F. Colliver, W. D. Wesson, L. Grigsby","doi":"10.1109/VTC.1978.1622514","DOIUrl":"https://doi.org/10.1109/VTC.1978.1622514","url":null,"abstract":"This paper will investigate the use of a micro-processor to control the operation of a d-c series motor that is used to drive a battery powered van. The microprocessor will accomplish this control by sampling the speed of the vehicle and comparing this speed to the desired speed, which is set by the operator, and then vary the duty cycle of the SCR chopper based on the computed speed error to maintain the vehicle at the desired speed. It should be pointed out that the reference speed signal is not to be preset such that the microprocessor must maintain only one speed, but rather the input speed reference is capable of being varied continuously from zero to maximum rated speed and the microprocessor is to track this varying reference and control the vehicle to this speed.","PeriodicalId":264799,"journal":{"name":"28th IEEE Vehicular Technology Conference","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1978-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114148934","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":"Medium frequency mine communications","authors":"R. Chufo","doi":"10.1109/VTC.1978.1622545","DOIUrl":"https://doi.org/10.1109/VTC.1978.1622545","url":null,"abstract":"Wireless radio transmission at Medium Frequency (MF) is feasible for both personnel and vehicular communications in underground mines. MF radio does not suffer from the severe corner losses and leaky feeder installation requirements of Ultra High Frequency (UHF) radio. Propagation data obtained in both coal and metal/nonmetal mines has encouraged several organizations to develop portable and base station equipment.","PeriodicalId":264799,"journal":{"name":"28th IEEE Vehicular Technology Conference","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1978-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123887074","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":"Iowa public safety mobile communications system \"Technology on the move\"","authors":"G. Graves","doi":"10.1109/VTC.1978.1622600","DOIUrl":"https://doi.org/10.1109/VTC.1978.1622600","url":null,"abstract":"This paper describes in detail the technical and operational aspects of the Iowa Public Safety Mobile Communications System. The mobile communications system is unique in design and applies many technological advances to land mobile applications. This system was designed by State of Iowa Electronic Engineers. This is not a turnkey system; the system is comprised of components representing 27 different manufacturers. Many components were uniquely designed or uniquely applied to mobile technology. The Iowa System makes near maximum use of available 155 MHz spectrum. It utilizes 15 KHz adjacent channel spacing and its repeater channels are as close as 195 KHz at co-located sites. Two repeaters and one simplex channel operate simultaneously within a 1 MHz spectrum.","PeriodicalId":264799,"journal":{"name":"28th IEEE Vehicular Technology Conference","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1978-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122106282","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":"Urban congestion and solar cycle effects on CB radio range","authors":"L. Berry","doi":"10.1109/VTC.1978.1622553","DOIUrl":"https://doi.org/10.1109/VTC.1978.1622553","url":null,"abstract":"The proliferation of Citizen's Band radio has occurred during a period of low solar activity when sky-wave propagation of 27 MHz signals was unlikely. Lucas (New York Times, July 11, 1976) pointed out that ionospherically propagated interference might significantly decrease the local range of CB radios near the peak of a solar cycle. On the other hand, increasing local congestion has already decreased this range in urban areas. The combined effects of noise, local co-channel interference, and sky-wave interference on radio range have been computed as functions of solar activity, fraction of the population transmitting on a channel, and area population for reasonable statistical distributions of transmitter and receiver characteristics. The model and the input data used in the calculation will be described.","PeriodicalId":264799,"journal":{"name":"28th IEEE Vehicular Technology Conference","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1978-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125791625","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":"Dead reckoning vehicle location using a solid state rate gyro","authors":"M. Kotzin, A. van den Heuvel","doi":"10.1109/VTC.1978.1622528","DOIUrl":"https://doi.org/10.1109/VTC.1978.1622528","url":null,"abstract":"A solid state rate sensor based on the principle of inertia modulation has been evaluated for use in a dead reckoning vehicle location system using sparse signposts. The sensor consisted of a small, simply supported steel bar caused to vibrate at its resonant frequency. Rotation of the bar about its longitudinal axis induces vibration in a plane orthogonal to the driven motion whose magnitude is linearly related to the rotation rate and, upon integration, angular displacement. This output, together with distance-travelled estimates from the vehicle odometer was used to provide a semi-continuous estimate of vehicle position relative to a known initial location and heading. Cumulative errors due to sensor inaccuracies and drift were corrected by means of a grid of simulated radio sign-posts spaced at approximately half mile intervals over the test area. Field test of the experimental system yielded a worst case location error of 212 ft. at the 95% confidence level. Location accuracies of 134 ft./95% were obtained when corrections based on map trends were employed.","PeriodicalId":264799,"journal":{"name":"28th IEEE Vehicular Technology Conference","volume":"158 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1978-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127373490","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":"New York World Trade Center three station, common antenna two-way repeater radio system","authors":"M.J. Caruso, D. Geller","doi":"10.1109/VTC.1978.1622547","DOIUrl":"https://doi.org/10.1109/VTC.1978.1622547","url":null,"abstract":"This paper descr ibes an indoor /outdoor an tenna s y s t e m t h a t serves t h e World Trade Center ' s th ree twoway r ad io s t a t ions , s imu l t aneous ly , each on d i f f e r e n t UHF channels . Each s t a t i o n p r o v i d e s : a ) b a s e t o p o r t ab le or mobi le communica t ions , b ) por tab le to por tab le r epea te r ope ra t ion and c ) one-way paging. The indoor s e c t i o n of the an tenna sys tem cons is t s of many branches of l eaky type an tenna t r ansmiss ion l i ne d i s t r ibu ted v i a c a r e f u l l y s e l e c t e d r u n s t h r o u g h o u t t h e s i x s u b t e r r a n i a n areas each t h e s i z e o f s e v e r a l f o o t b a l l f i e l d s . An assortment of transmitter combiners, receiver combiners and a q u a d r u p l e x e r c o u p l e s t h e s t a t i o n s t o t h e a n t e n n a system. Branching w a s accomplished using signal s p l i t ters and combiners. The ends of each branch were t e rmina ted wi th qua r t e r wave whip antennas mounted on ground planes to maximize signal condi t ions where down l i n e l o s s e s are t h e g r e a t e s t . An outdoor antenna serves t h e a b o v e t e r r a i n areas o f t h e b u i l d i n g s , t h e plaza, the surrounding s idewalks and s t reets ,","PeriodicalId":264799,"journal":{"name":"28th IEEE Vehicular Technology Conference","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1978-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130092966","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":"Passive reflectors as a means for extending UHF signals down intersecting cross cuts in mines or large corridors","authors":"R. A. Isberg, R. Chufo","doi":"10.1109/VTC.1978.1622546","DOIUrl":"https://doi.org/10.1109/VTC.1978.1622546","url":null,"abstract":"Tests of communication between hand held two watt UHF transceivers in a room and pillar limestone mine were satisfactory for several thousand feet through straight haulage ways but the range of communication at right angles to the haulage way into intersecting cross cuts was quite limited. It was evident that the radiation from the transceivers was not being reflected by the limestone pillars into the intersecting cross cuts. Two passive aluminum reflectors, each four feet square were installed near the ceiling and positioned 45° with respect to the axis at an intersection of a main haulage way and a cross cut. The range of communications down the intersecting cross cut was significantly extended. Propagation measurements on 450 and 850 MHz in the same mine demonstrated that passive reflectors are a practical and inexpensive means for extending communications into intersecting cross cuts. The same formulae and nomograms which are used for microwave passive reflectors can be used for UHF reflector design.","PeriodicalId":264799,"journal":{"name":"28th IEEE Vehicular Technology Conference","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1978-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126679935","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":"Preprocessing techniques on computer simulation of motorvehicle crash victims","authors":"B. Dimitriadis, P. Groumpos","doi":"10.1109/VTC.1978.1622565","DOIUrl":"https://doi.org/10.1109/VTC.1978.1622565","url":null,"abstract":"Methods of solution of algebraic equations generated by current computer simulation schemes for motorvehicle crash victims are reviewed. Preprocessing techniques, usually found in the literature applied in other areas, are for the first time applied in this problem. Thus, a favorable matrix structure, is generated. Using inherent symmetries present in the above models under certain circumstances the coefficient matrices of the generated sets of equations are transformed into block-arrow forms. For the inversion of those forms, a fast algorithm is provided. When perturbation, symmetric or not, is generated, the matrix partitioning technique has been applied reducing the problem into two parts: a) One easily solvable by the above proposed fast block-arrow form inversion algorithm and b) a very low-order one (including actually only the perturbation, which can be solved readily by any usual technique. We can proceed in this Way, to the solution of very large-dimensional problems, in a very fast and accurate fashion.","PeriodicalId":264799,"journal":{"name":"28th IEEE Vehicular Technology Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1978-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121036705","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 in Bell system","authors":"J. Macdougall","doi":"10.1109/VTC.1978.1622513","DOIUrl":"https://doi.org/10.1109/VTC.1978.1622513","url":null,"abstract":"The Bell System consists of the American Telephone and Telegraph Company with its subsidiaries Western Electric Company, the supply and manufacturing arm of the Bell System; the Bell Telephone Laboratories, the research and development group; and the Operating Telephone Companies that supply local telephone service. Another part of ATbT is the Long Lines Department that operates the long haul long distance service. Bell Telephone Laboratories is owned jointly by ATbT and Western Electric.","PeriodicalId":264799,"journal":{"name":"28th IEEE Vehicular Technology Conference","volume":"121 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1978-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116705105","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}