IEEE International Symposium on Personal, Indoor and Mobile Radio Communications.最新文献

{"title":"Reduced-Decoding Complexity Of Quadrature Partial Response Trellis Coded Modulation (QPR-TCM) In The Presence Of Intersymbol Interference","authors":"O. Ucan, Ümit Aygölü, E. Panayirci","doi":"10.1109/PIMRC.1991.571481","DOIUrl":"https://doi.org/10.1109/PIMRC.1991.571481","url":null,"abstract":"In this paper, to improve both bandwidth efficiency and error performance, partial response signalling and trellis coded modulation are considered together for QAM. A new receiver for data transmission systems employing combined partial responsetrellis coded modulation (QPR-TCM) i s investigated. Thus, combined 6QPR-TCM and 42QPR-TCM systems are introduced. Simulation studies in IS1 environment are done. In colored noise environment, the error probability of 6QPR-TCM is analytically lower bounded and compared to the classical 4QAMTCM .","PeriodicalId":254396,"journal":{"name":"IEEE International Symposium on Personal, Indoor and Mobile Radio Communications.","volume":"341 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":"115983258","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":"Suburban Propagation Measurements At 1.8 Ghz And Their Application To PCN","authors":"Y. F. Ko","doi":"10.1109/PIMRC.1991.571512","DOIUrl":"https://doi.org/10.1109/PIMRC.1991.571512","url":null,"abstract":"Future land mobile radio systems aimed at the mass market have an unprecedented capacity requirement especially in dense areas. Such capacities can only be achieved by using cell radii below 1 km and larger frequency allocations. However, in other areas, such small cells are not necessary because the demand and the propagation loss are lower. Personal Communications Networks (PCNs) will operate in the 1800 MHz band in two blocks of 75 MHz separated by a 20 MHz guard band. The European Telecommunications Standards Institute (ETSI) has formulated a translation of the GSM 900 standard to the PCN band to form a new pan-European standard called Digital Cellular System 1800 (DCS1800).","PeriodicalId":254396,"journal":{"name":"IEEE International Symposium on Personal, Indoor and Mobile Radio Communications.","volume":"6 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":"123333293","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":"Compound Strategies Of Coding, Equalization And Space Diversity For Wide-bind TDMA Indoor Wireless Channels","authors":"C. Despins, D. Falconer, S. Mahmoud","doi":"10.1109/PIMRC.1991.571467","DOIUrl":"https://doi.org/10.1109/PIMRC.1991.571467","url":null,"abstract":"Compound strategies of equalization and space diversity in the form of an optimum baseband combiner are attractive for wide-band time division multiple access (TDMA) portable communication radio links in order to combat dispersive fading and cochannel interference. This paper investigates the performance of such a scheme in conjunction with convolutional coding and soft-decision Viterbi decoding via a semi-analytical technique based on the method of moments. Such an approach avoids a Gaussian characterization of interference and yields results for both ideal interleaving and no interleaving. With dual space diversity, three taps per forward filter and a data rate of 10 Mb/s, it is shown that, although a third space diversity branch remains preferable in terms of performance, channel coding can be a viable alternative, particularly in terms of outage rate, to increasing the space diversity order even in the absence of interleaving provided the signal-to-interference ratio is sufficiently high","PeriodicalId":254396,"journal":{"name":"IEEE International Symposium on Personal, Indoor and Mobile Radio Communications.","volume":"26 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":"131971951","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":"Performance Of A Convolutionally Coded Chip Combiner DS Receiver In Pulsed Noise And CW Interference","authors":"J. Juntti, Kari Jyrkä, Pentti A. Leppänen","doi":"10.1109/PIMRC.1991.571491","DOIUrl":"https://doi.org/10.1109/PIMRC.1991.571491","url":null,"abstract":"The performance of a chip combiner DS/BPSK receiver is analysed by means of an extensive Monte-Carlo computer simulation in an AWGN channel, in pulsed WGN and in CW interference using BPSK modulation and an optimum convolutional code of constraint length 7 and code rate 1/2. It is assumed that an interleaver will randomize error bursts. The receiver employs a soft decision Viterbi decoder and a chip combiner interference estimation circuit. The receiver structure eliminates the need for a fast-acting AGC circuit and instead it is assumed that the AGC will remain constant under an interference pulse. The chip combiner DS receiver proved to be robust in the pulsed interference. The optimum erasure level can be determined by simulation if the interference scenario is known. Otherwise good compromises can be determined.","PeriodicalId":254396,"journal":{"name":"IEEE International Symposium on Personal, Indoor and Mobile Radio Communications.","volume":"21 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":"130514838","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":"Multipath Delay Profile Prediction On A Workstation For Urban Mobile Radio Communications","authors":"T. Takeuchi, M. Sako, S. Yoshida","doi":"10.1109/PIMRC.1991.571456","DOIUrl":"https://doi.org/10.1109/PIMRC.1991.571456","url":null,"abstract":"A multipath delay profile prediction system without any field measurement is proposed. The applied method is purely theoretical one assuming a direct-diffracted wave from transmitting antenna and the waves scattered on the walls visible from transmitting antenna as incident waves at a receiving point. The prediction system has been realized on a workstation. Comparison with measured results shows good agreement with the predicted. 1.0 Introduction Digital mobile radio communication provides various changes in the mobile telecommunications [ 13. However, its performance is greatly dependent on the multipath delay characteristics, because the bit error is due to the channel distortion caused by frequency selective fading. The multipath delay characteristics of service area is an important information for the system design. Generally, field measurement is conducted to investigate the multipath delay, which is time-consuming and uneconomical. A deterministic approach, such as the prediction of multipath propagation environment for the concerned place can be quite worthwhile to design the mobile radio system, if the topological information is available. There have been some works to estimate the statistical characteristics of mobile radio channel according to building map data [21[3]. However, they have not predicted the exact multipath delay profile at arbitrary receiving point, which will sometimes good information to evaluate the service area and system performance. This paper proposes a method to predict multipath delay profiles in urban areas assuming building-wall-scattered waves and direct-diffixted waves based on a building topological database, where the delay profile prediction system was realized on a workstation. And it is shown that the predicted power delay profiles are coincide with the measured ones, 2.0 Principle The proposed method predicts direct-dz$acted waves (diffracted wave travels on the line connecting between the transmitting and the receiving antennas) and building-wall-scattered wuves arriving at a receiving point based on a building topological database. 2.1 Building topological database The building topological database contains the building positions and heights expressed by wall-vectors representing the outline of the building by rounding counterclockwise [4]. The data were digitized from building maps scaled 1/2500, and its accuracy is 1 m. The height of building, H , is calculated by the equation H = [3.8N + 2.51 (m), where [ ] denote the Gauss symbols and N is the number of story observed in the field inspection. In the prediction, it is assumed that all the buildings stand on a flat surface. 2.2 Delay profile prediction The propagation model assumed for delay profile prediction is composed of direct-diffracted waves and buildingwall-scattered waves. The direct-diffracted wave is the wave travels on the line connecting the transmitting and the receiving antennas, which becomes a direct wave when no diffracting object","PeriodicalId":254396,"journal":{"name":"IEEE International Symposium on Personal, Indoor and Mobile Radio Communications.","volume":"1 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":"129805370","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":"Specifying Local Oscillator Phase Noise Performance: How Good is Good Enough?","authors":"R. Gilmore","doi":"10.1109/PIMRC.1991.571484","DOIUrl":"https://doi.org/10.1109/PIMRC.1991.571484","url":null,"abstract":"Definitive criteria are provided for specifying local oscillator phase noise performance for use in communication systems. In the absence of such criteria, many oscillators tend to be either under or over-specified. The emphasis is on digital modulation and demodulation, but analog communications are also considered. LO phase noise is analyzed for loss in demodulator performance, and also for impact on the modulation process. The results may be used to select an appropriate oscillator, or to tailor the noise characteristics of a frequency synthesizer design.","PeriodicalId":254396,"journal":{"name":"IEEE International Symposium on Personal, Indoor and Mobile Radio Communications.","volume":"33 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":"116979084","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":"An Hybrid Packet Reservation-Demand Assignment Multiple Access Protocol For Personal Communications","authors":"I. Berberana, José Jiménez","doi":"10.1109/PIMRC.1991.571479","DOIUrl":"https://doi.org/10.1109/PIMRC.1991.571479","url":null,"abstract":"In this contribution we propose a Media Access Control (MAC) Protocol for personal communications which combines features from Packet Reservation Multiple Access (PRMA) [1)[2] and Demand Assignment or Reservation MA [3][4]. This protocol is thought to work in a microcellular environment providing both voice and data services with low power terminals. Multiplexing should be performed at talkspurt level in order to increase the system capacity. In this kind of enviroment, signalling traffic may be higher than in traditional cellular networks, due to the number of hand-over and roaming operations. This traffic may be greater if the mobile system is required to support some supplementary ISDN services andlor Inteligent Network services.","PeriodicalId":254396,"journal":{"name":"IEEE International Symposium on Personal, Indoor and Mobile Radio Communications.","volume":"122 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":"124689861","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":"Multiple-Access Capability Of Frequency-Hopped Spread-Spectrum Cellular Radio Communications","authors":"A. Correia, A. A. Albuquerque","doi":"10.1109/PIMRC.1991.571476","DOIUrl":"https://doi.org/10.1109/PIMRC.1991.571476","url":null,"abstract":"In this paper we apply the new accurate method for the evaluation of the probability of error of uncoded asynchronous frequency-hopped spread-spectrum multiple-access (FI-X/SSMA) communications, described in [ 11, to cellular mobile radio communications. Users are assumed to be Poisson distributed in the plane. Systems with M-ary FSK modulation and noncoherent demodulation are considered. The Gaussian approximation method is also presented. We compare the results based on both methods.","PeriodicalId":254396,"journal":{"name":"IEEE International Symposium on Personal, Indoor and Mobile Radio Communications.","volume":"36 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":"127759723","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":"System Design For Location Detection And Monitoring Functions - An Application For PABX Accessed Portable Telephone","authors":"S. Ito","doi":"10.1109/PIMRC.1991.571499","DOIUrl":"https://doi.org/10.1109/PIMRC.1991.571499","url":null,"abstract":"","PeriodicalId":254396,"journal":{"name":"IEEE International Symposium on Personal, Indoor and Mobile Radio Communications.","volume":"12 5 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":"129254947","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":"DEXT: On The Verge Of Cordless And Cellular Systems","authors":"M.J.J. van Nielen","doi":"10.1109/PIMRC.1991.571493","DOIUrl":"https://doi.org/10.1109/PIMRC.1991.571493","url":null,"abstract":"This paper describes the DECT (Digital European Cordless Telecommunications) system and the envisaged application environments, such as the residential, the office and the public environment. If DECT base stations in the public environment (telepoints) are interconnected via a mobility supporting network, a PCN-like system could be offered, thus eliminating the difference between cordless and cellular systems.","PeriodicalId":254396,"journal":{"name":"IEEE International Symposium on Personal, Indoor and Mobile Radio Communications.","volume":"2014 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121764428","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}