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1991 Sixth International Conference on Mobile Radio and Personal Communications

9-11 Dec 1991

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Displaying Results 1 - 25 of 51
  • Simulation of man-made noise in 100 MHz to 3 GHz band

    Publication Year: 1991, Page(s):255 - 260
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (336 KB)

    The authors describe the physical nature of impulsive noise and its simulation. The RF part and digital part of the simulator are described. Man-made impulsive noise environments were simulated and output impulsive noise was measured using noise amplitude distribution (NAD) measuring equipment. The results were in excellent agreement with measured results. The simulator was used to assess the perf... View full abstract»

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  • A study of the error mechanism in wideband mobile radio

    Publication Year: 1991, Page(s):248 - 254
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (304 KB)

    Frequency-selective fading caused by multipath time dispersion degrades the performance of digital communication systems by causing intersymbol interference, resulting in an irreducible BER, and imposing an upper limit on the data symbol rate. The authors present the results of a software investigation of the performance of a GSM-based system, over a mobile radio channel, which has been modelled b... View full abstract»

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  • Average bit error rate for coherent detection in macro and micro cellular radio

    Publication Year: 1991, Page(s):241 - 247
    Cited by:  Papers (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (384 KB)

    The probability of bit error is investigated, taking account of propagation effects in macrocellular and microcellular networks, noise and multiple interferers. Coherent detection of BPSK, QPSK and BFSK is considered with combined log-normal shadowing and Rayleigh fading for macrocellular radio and combined log-normal shadowing and Rician fading for microcellular radio. The effect of interference ... View full abstract»

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  • The application of 16APSK to mobile fading channels

    Publication Year: 1991, Page(s):233 - 240
    Cited by:  Papers (8)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (456 KB)

    Data transmission in the mobile environment is particularly susceptible to the distortion introduced by the propagating channel. The authors concentrated on 16APSK, which utilises two concentric 8-PSK rings to greatly simplify the process of differential reception. Both differentially encoded and differentially demodulated 16APSK are examined (16DEAPSK and 16DAPSK respectively) together with metho... View full abstract»

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  • Transmission planning for mobile telecommunication systems

    Publication Year: 1991, Page(s):126 - 130
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (332 KB)

    Describes the various transmission planning parameters and how they are apportioned within mobile communications systems. The limits that are set on these parameters to provide acceptable speech quality for the customer, be he a fixed or mobile subscriber, are discussed. In some areas the limits are well defined in European and global standards. However, mobile communications networks are introduc... View full abstract»

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  • Sixth International Conference on Mobile Radio and Personal Communications (Conf. Publ. No.351)

    Publication Year: 1991
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (32 KB)

    The following topics were dealt with: channel characterisation; modulation and coding; multiple access and distribution; mobile satellite communications; network planning, circuit configurations; GSM and PCN; third generation systems; location, routing and data; and RLANs and DECT View full abstract»

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  • Introducing personal communications in the developing countries: alternatives and issues

    Publication Year: 1991, Page(s):208 - 211
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (212 KB)

    In planning services in developing countries, the major issues that need to be tackled are: rapid technological growth, a large number of standards and regulatory/financial constraints. The authors touch upon the alternatives and various issues involved in introducing personal communication services in developing countries for both mobile communication and rural/remote area communication through f... View full abstract»

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  • A simulation of a GSM network with frequency hopping

    Publication Year: 1991, Page(s):167 - 174
    Cited by:  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (340 KB)

    A simple mathematical model indicated that the potential advantages of hopping were considerable, so it was decided to develop a more sophisticated Monte Carlo simulation. In the process, some interesting results have been obtained which are equally applicable to non-hopping systems. As with any simulation, some simplifications must be made to reduce the complexity of the problem to a level that c... View full abstract»

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  • A handover protocol for a mixed cell system

    Publication Year: 1991, Page(s):225 - 232
    Cited by:  Papers (2)  |  Patents (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (452 KB)

    With finite radio spectrum allocation proposed for the third generation mobile system, an effective approach to achieve the provision of personal telecommunication services to the mass public is by the introduction of a mixed cell architecture. This implies that cells of different sizes would be overlaid and base stations with different transmit power levels would co-exist in close proximity. The ... View full abstract»

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  • Cellular radio-telephone simulator

    Publication Year: 1991, Page(s):121 - 125
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (256 KB)

    Describes the cellular radio-telephone simulator which is being enveloped at BNR Europe Limited (which incorporates STL) as part of a DTI LINK programme. In order to illustrate some of the features of the simulator, two forms of channel allocation strategy and power control are considered, and results are presented View full abstract»

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  • A DECT testbed for applications and services studies

    Publication Year: 1991, Page(s):308 - 315
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (636 KB)

    A testbed of for the DECT system has been constructed and the basic concepts of the DECT radio specification have been validated. The testbed is proving to be a flexible and valuable tool for developing applications and services View full abstract»

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  • Terminal self-location in mobile radio systems

    Publication Year: 1991, Page(s):203 - 207
    Cited by:  Papers (7)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (388 KB)

    The authors look at some of the work carried out during this year's study, as part of the LINK Personal Communications Programme, on the implications and practicality of self-locating intelligent mobile (SLIM) terminals, especially when used within intelligent networks. The extent to which terminal self-location can contribute to improving the efficiency of operation of the overall radio system is... View full abstract»

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  • Facsimile group 3, a GSM PLMN service

    Publication Year: 1991, Page(s):163 - 166
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (196 KB)

    Facsimile is included in the portfolio of GSM services and is supported by ETSI recommendation 03:45 (by transparent data services), and ETSI recommendation 03:46 (by non-transparent data services). The facsimile group 3 communications protocol and its implementation are discussed View full abstract»

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  • Frame by frame transmission and detection techniques for a mobile radio channel

    Publication Year: 1991, Page(s):101 - 107
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (400 KB)

    Considers packet data transmission over radio channels. A worst case model of a mobile radio channel is used. A useful adaptive matched-filter detection technique useful for this kind of channel with several independent fading paths has been used and found to work satisfactorily Two methods of frame by frame detection are presented. It has also been found that if the stored vectors in the modified... View full abstract»

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  • Performance evaluation of a UMTS in a urban environment

    Publication Year: 1991, Page(s):218 - 224
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (472 KB)

    By means of a simulation programme comparisons were made between different channel allocation schemes and handover criteria in case of uniformly and nonuniformly distributed traffic. These comparisons were, performed in a typical macrocellular environment. Output parameters included statistical C/I distribution, handover rates and carried traffic. The authors present the main functional and archit... View full abstract»

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  • Network aspects of public land mobile and personal communications systems

    Publication Year: 1991, Page(s):115 - 120
    Cited by:  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (460 KB)

    Provides a broad overview of the many important network issues raised by the introduction of public land mobile and personal communications systems, based on cellular radio technology. The following topics are considered: network architecture, interconnection with fixed networks such as the public switched telephone network (PSTN), numbering, the application of intelligent network concepts, signal... View full abstract»

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  • The performance of DECT in the outdoor 1.8 GHZ radio channel

    Publication Year: 1991, Page(s):300 - 307
    Cited by:  Papers (23)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (612 KB)

    The authors looks at the application of the DECT standard to outdoor public access systems (e.g. cordless access and telepoint) and the technical issues raised by its deployment in outdoor environments. They aim to fully characterise propagation conditions in a typical telepoint area and then to accurately predict the DECT link performance for such an environment. Conclusions are drawn as to the m... View full abstract»

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  • Fast VQ-CELP-a speech coder for mobile radio

    Publication Year: 1991, Page(s):280 - 285
    Cited by:  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (244 KB)

    The currently emerging generation of mobile radio systems employs digital speech transmission techniques to achieve higher system capacity than analogue systems. Therefore methods of transmitting high quality digital speech signals at low bit rates are of great interest in such applications. The CELP (code excited linear prediction) algorithm is a good basis for meeting this requirement. However, ... View full abstract»

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  • Study into the use of search, vote and lock for Metropolitan Police personal radio systems

    Publication Year: 1991, Page(s):197 - 202
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (296 KB)

    The Metropolitan Police Service intends to replace its current VHF network of divisional and specialist personal radio systems with a network operating on UHF assignments. The re-engineering program involves over 10000 handheld radios and fixed equipment at over 400 sites. The authors reports on recent work carried out to assess the operational and engineering aspects concerned with achieving wide... View full abstract»

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  • Analysis of decision-aided DPSK in the presence of multipath fading

    Publication Year: 1991, Page(s):157 - 162
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (272 KB)

    A decision-aided DPSK receiver scheme is proposed, which can achieve channel equalization using data symbols alone (i.e. no additive reference information is required). It makes use of the fact that for a typical irreducible error rate of 1%, 99% of the received symbols are correctly demodulated. Using this information to remove the modulation from the incoming radio signal effectively results in ... View full abstract»

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  • A 32 Mbit/s mobile radio link

    Publication Year: 1991, Page(s):31 - 38
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (380 KB)

    Quadrature amplitude modulation (QAM) for digital data transmission at 32 Mbits/s over mobile radio channels is considered. At this transmission rate intersymbol interference (ISI) will generally occur, causing problems in accurately recovering the received signal. The authors consider a novel QAM equalizer which gives the wideband system superior performance to the narrowband system by virtue of ... View full abstract»

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  • MPSK TCM with imperfect phase reference

    Publication Year: 1991, Page(s):93 - 100
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (300 KB)

    The effect of a noisy carrier reference on MPSK trellis coded modulation (TCM) systems is studied for both the static and Rayleigh fading environments. Upper bounds for the error probability are presented for each case. Software and hardware simulation results are presented to show the tightness of these bounds View full abstract»

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  • Characterisation of short-range microwave radio transponding channels for road-use debiting schemes

    Publication Year: 1991, Page(s):261 - 266
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (492 KB)

    The authors present the results of the efforts of the PAMELA consortium to characterise microwave radio propagation channels likely to be encountered in any short-range digital data transponding link. They describe the geometry of the multipath problem for both directions of the link. The effects of antenna patterns on the transmission are implemented in the modelling by incorporating measurement ... View full abstract»

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  • The regulation of mobile communications

    Publication Year: 1991, Page(s):131 - 135
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (352 KB)

    Mobile communications are at the forefront of changes in the telecommunications regulatory environment, and are also affected in more ways than any other service. The following topics are discussed: use of the spectrum; regulation for competition; personal communications; regulation in practice; and the regulator's role View full abstract»

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  • An analytical model for indoor multipath propagation in the picocellular environment

    Publication Year: 1991, Page(s):1 - 8
    Cited by:  Papers (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (416 KB)

    Presents a deterministic algorithm for the prediction of channel characteristics for small cell radio systems. This is achieved through the application of ray tracing techniques on a simplified 3-D description of a given environment. The model has been shown to agree well with wideband measurements made at the University of Bristol. The model has been used to generate narrowband data, Doppler scat... View full abstract»

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