{"title":"Fuzzy Handoff Control Using Learnt Cell Boundary for Radio PBX","authors":"Yasuaki Kinoshjta, Y. Omata, Tetsuya Fukudome","doi":"10.1109/PIMRC.1991.571500","DOIUrl":"https://doi.org/10.1109/PIMRC.1991.571500","url":null,"abstract":"","PeriodicalId":254396,"journal":{"name":"IEEE International Symposium on Personal, Indoor and Mobile Radio Communications.","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127531094","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 Capacity Estimation Model For Cellular Systems","authors":"J. Short, B. Zako","doi":"10.1109/PIMRC.1991.571455","DOIUrl":"https://doi.org/10.1109/PIMRC.1991.571455","url":null,"abstract":"Acomputer model has been developed to set up a single RF carrier scenario consisting of a central serving cell and two tiers of co-channel interferers. Samples are then generated uniformly within the serving cell and at each point the carrier to co-channel interference ratio (CA) is evaluated. The cumulative distribution function (CDF) can then be derived by considering a large number of samples. For a given C/Ic threshold, the outage probability of the system is then found by drawing the appropriate threshold line across the CDF.","PeriodicalId":254396,"journal":{"name":"IEEE International Symposium on Personal, Indoor and Mobile Radio Communications.","volume":"124 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126086627","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":"Voltage Tuneable RF Bandpass Filters For Mobile Communications","authors":"P. Sroka","doi":"10.1109/PIMRC.1991.571460","DOIUrl":"https://doi.org/10.1109/PIMRC.1991.571460","url":null,"abstract":"","PeriodicalId":254396,"journal":{"name":"IEEE International Symposium on Personal, Indoor and Mobile Radio Communications.","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126386183","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":"Use Of A Matched Filter For DS Receiver Synchronization In An AWGN Channel With Continuous And Pulsed Tone Jamming","authors":"J. Iinatti, Pentti A. Leppänen","doi":"10.1109/PIMRC.1991.571487","DOIUrl":"https://doi.org/10.1109/PIMRC.1991.571487","url":null,"abstract":"This paper introduces some simulation results regarding a DS spread spectrum system in which the principle of matched filter synchronization for acquisition of the code synchronization is used. Acquisition is performed by means of a matched filter or matched filter and reference filter, and synchronization pulses are integrated recursively over ten databits. A Gold code pair is used as the spreading code. AWG noise and a jamming carrier are added to the information signal in the channel, the jamming signal being either continuous or pulsed. The probabilities of detecting the main correlation peaks and false synchronizations and bit error rates are measured in the simulations. Some advantages are obtained from a reference filter in certain cases.","PeriodicalId":254396,"journal":{"name":"IEEE International Symposium on Personal, Indoor and Mobile Radio Communications.","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125656039","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}
K. Kobayashi, T. Sakai, S. Kubota, M. Morikura, S. Kato
{"title":"A New Carrier Recovery Circuit For Land Mobile Satellite Communication","authors":"K. Kobayashi, T. Sakai, S. Kubota, M. Morikura, S. Kato","doi":"10.1109/PIMRC.1991.571507","DOIUrl":"https://doi.org/10.1109/PIMRC.1991.571507","url":null,"abstract":"A DCF (dual carrier filter) reverse-modulation-type carrier recovery circuit is proposed to achieve a low carrier skipping rate and satisfactory phase tracking performance for coherent detection of PSK (phase shift keying) signals in fast Rician fading channels. The proposed scheme employs both narrow and wide bandwidth carrier filters simultaneously for the reverse-modulation-type carrier recovery circuit. It is clarified by computer simulation that the Pe performance of a QPSK (quadriphase shift keying) modem employing the proposed scheme shows an improvement of 1.5 dB in required E/sub s//N/sub O/ at Pe=10/sup 4/ (after Viterbi decoding (R=7/8, K=7), C/M (direct-to-multipath signal power ratio)=10 dB, interleaving size=64*64), compared with conventional coherent detection employing the reverse modulation tank-limiter scheme or the Costas loop scheme. >","PeriodicalId":254396,"journal":{"name":"IEEE International Symposium on Personal, Indoor and Mobile Radio Communications.","volume":"355 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115934374","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":"Effective Order Of Implicit Diversity In The Performance Of CDMA In Indoor Radio Channels","authors":"A. Falsafi, K. Pahlavan","doi":"10.1109/PIMRC.1991.571492","DOIUrl":"https://doi.org/10.1109/PIMRC.1991.571492","url":null,"abstract":"This paper addresses different methods for calculation of the average error rate of a BPSK modulated direct-sequence spread spectrum (DS-SS) system in the presence of multi-user and multipath interference and AWGN. It is shown that the performance of such systems can be approximated using certain parameters derived from the channel model. The performance of the system in a simulated channel model is compared with previously published methods for performance analysis [5,6, lo]. Improvements to this approximation are proposed which show close agreement with the results of computer simulations.","PeriodicalId":254396,"journal":{"name":"IEEE International Symposium on Personal, Indoor and Mobile Radio Communications.","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127615093","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}
Y. Arakaki, E. Morikawa, R. Miura, T. Ikegami, H. Wakana, S. Ohmori, M. Wakao
{"title":"Experiments On SCPC Communication And Radio Determination Using Two Geostationary Satellite","authors":"Y. Arakaki, E. Morikawa, R. Miura, T. Ikegami, H. Wakana, S. Ohmori, M. Wakao","doi":"10.1109/PIMRC.1991.571508","DOIUrl":"https://doi.org/10.1109/PIMRC.1991.571508","url":null,"abstract":"Communications Research Laboratory (CRL) and R&D center for Radio Systems have developed a new h y b r i d satellite system which can provide both c o m m u n i c a t i o n s and p o s i t i o n i n g s e r v i c e s in o n e system using two geostationary satellites. The distinctive feature is that location information can be provided by transmitting and receiving ranging signals through two geostationary satellites over the same channel a s communications. Offset-QPSK modulation method is used to handle both communication and ranging signal through a non linear channel such as C-class HPA’s mobile terminals. A ranging signal o f 1 2 0 0 chip rate consists of a part o f PN code of 2 4 0 0 chip M-sequence. Evaluation tests performed on board a ship in the Pacific Ocean showed that positioning accuracy is about 600m at middle latitude. 1 . 0 INTRODUCTION Satellite-based radio determination systems are being developed in the world. Most systems can provide only radio determination service. I f a system w h i c h can provide both radio determination and communication service is developed, th.en we can expect various kinds o f services.Cl] Communications Research Laboratory(CRL) and R&D center for Radio systems have developed a communication and radio determination hybrid s y s t e m . W i t h a s u p p l e m e n t a r y f u n c t i o n a d d e d t o usual satellite communication systems, positioning of mobile stations and communication services such as voice and data transmission can be s i m u l t a n e o u s l y p r o v i d e d o v e r a s i n g l e c o m m u n i c a t i o n s channel.C2) This paper gives the outline o f the system and results of evaluation tests on board a s h i p in the Pacific Ocean. 2.0 E X P E R I M E N T A L SYSTEM The experimental system consists o f two geostationary satellites, ETS-V at 1 5 0 E longitude and I N M A R S A T at 180 E longitude, a base earth station (Kashima Space Research Center) and a mobile earth","PeriodicalId":254396,"journal":{"name":"IEEE International Symposium on Personal, Indoor and Mobile Radio Communications.","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131433254","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":"Evaluation Of The Optimum Symbol State For Pilot Symbol Insertion 16-QAM","authors":"M. Li, A. Bateman, Joe McGeehan","doi":"10.1109/PIMRC.1991.571480","DOIUrl":"https://doi.org/10.1109/PIMRC.1991.571480","url":null,"abstract":"","PeriodicalId":254396,"journal":{"name":"IEEE International Symposium on Personal, Indoor and Mobile Radio Communications.","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115364196","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}
E. Moriyama, M. Mizuno, Y. Nagata, Y. Furuya, I. Kamiya, S. Hattori
{"title":"2.6 Ghz Band Multipath Characteristics for Urban Microcellular Telecommunication Systems","authors":"E. Moriyama, M. Mizuno, Y. Nagata, Y. Furuya, I. Kamiya, S. Hattori","doi":"10.1109/PIMRC.1991.571514","DOIUrl":"https://doi.org/10.1109/PIMRC.1991.571514","url":null,"abstract":"L O Summary Measurement of multipath delay profile characteristics in the 2.6 GWz band has been carried out within a 2 x 1.5 km area in metropolitan Tokyo to investigate the feasibility of a high speed digital micro-cellular portable radio system. The measurement system has time resolution of 40 ns. In this paper we present the spatial variations of the power delay profile and the delay-Doppler spectra, and we show the cumulative distribution of the delay spread and the error rate caused by multipath in the micro-cellular propagation environment.","PeriodicalId":254396,"journal":{"name":"IEEE International Symposium on Personal, Indoor and Mobile Radio Communications.","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132976023","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":"The Design and Development of a Code Division Multiple Access (CDMA) System for Cellular and Personal Communications","authors":"E. Tiedemann, A. Salmasi, K. Gilhousen","doi":"10.1109/PIMRC.1991.571478","DOIUrl":"https://doi.org/10.1109/PIMRC.1991.571478","url":null,"abstract":"","PeriodicalId":254396,"journal":{"name":"IEEE International Symposium on Personal, Indoor and Mobile Radio Communications.","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131836241","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}