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Communications, Radar and Signal Processing, IEE Proceedings F

Issue 5 • Date August 1985

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Displaying Results 1 - 18 of 18
  • Editorial. Land mobile radio

    Publication Year: 1985, Page(s):305 - 306
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | PDF file iconPDF (251 KB)
    Freely Available from IEEE
  • Propagation at 500 MHz for mobile radio

    Publication Year: 1985, Page(s):307 - 320
    Cited by:  Papers (9)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1711 KB)

    The basic characteristics of radio paths relevant to mobile radio communication at UHF are reviewed. Data gathered in a comprehensive survey of urban and suburban Melbourne were analysed to test for consistency with several simple models: Rayleigh envelope, a power spectrum model, log-normal distribution of mean, and the effects of distance and slope of terrain. Factors limiting the validity of so... View full abstract»

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  • Boundaries between radio cells¿influence of buildings and vegetation

    Publication Year: 1985, Page(s):321 - 325
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (776 KB)

    In mobile radio services, an efficient utilisation of the frequency spectrum can be achieved by the small-cell concept. However, small cells lead to high hand-over rates of the radio link between the mobile and the different base stations in the vicinity of the cell boundary. The absolute field-strength levels and the differnces between them when received from various base stations are regarded as... View full abstract»

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  • Conference report

    Publication Year: 1985
    IEEE is not the copyright holder of this material | PDF file iconPDF (160 KB)
    Freely Available from IEEE
  • UHF wideband statistical model and simulation of mobile radio multipath propagation effects

    Publication Year: 1985, Page(s):327 - 333
    Cited by:  Papers (8)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1046 KB)

    A local wideband statistical model is presented for UHF mobile multipath propagation. The complex echo-envelope statistics have been derived from 10 MHz wideband pulse soundings at 436 MHz over a large area in suburban and urban localities. In the proposed model, the effects of Doppler-induced RF phase shifts have been considered. Echo paths are shown to fit a Poisson distribution for the excess t... View full abstract»

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  • Prediction of bit error rate in the presence of impulsive noise: a numerical approach using measured noise data

    Publication Year: 1985, Page(s):334 - 342
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1103 KB)

    Predictions of bit error rate caused by a combination of impulsive and Gaussian noise are made for data communication systems using PSK, DPSK and FSK, with direct carrier modulation. The technique uses the amplitude probability distribution (APD) to characterise the noise at the input of the receiver demodulator. A direct numerical approach (with numerical integration, where appropriate) is used t... View full abstract»

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  • Bit error distribution in digital mobile radiocommunication¿comparison between field measurements and fading simulation

    Publication Year: 1985, Page(s):343 - 347
    Cited by:  Papers (6)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (699 KB)

    It is proposed to test the performance of mobile radio equipment by use of a fading simulator. This procedure has the advantages that the measurements can be made in laboratories, and that the random fading is reproducible in its statistical charcter. It is essential, however, to compare the results of fading simulation with field measurements. The fading simulator used is non-frequency-selective,... View full abstract»

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  • Digital modems for land mobile radio

    Publication Year: 1985, Page(s):348 - 362
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (2231 KB)

    The paper surveys the digital modulation methods available for use in land mobile radio systems. The modulation methods are compared on the basis of their relative tolerances to additive white Gaussian noise, and brief consideration is also given to the equipment complexities involved. The emphasis of the paper is on basic techniques and the essential mechanisms by which they operate, with a view ... View full abstract»

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  • Coherent demodulation of pilot tone single sideband with phase-locked TTIB/FFSR processing

    Publication Year: 1985, Page(s):363 - 365
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (413 KB)

    The paper describes a simple modification to TTIB/FFSR signal processing which permits coherent demodulation of the received signal. This property is fundamental to the successful operation of some data modems used extensively in mobile radio. The operation of the modified processing is independent of the variable delay introduced by the transmitter and receiver RF/IF circuitry and by the propagat... View full abstract»

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  • Experimental evaluation of packet error rates for the 850 MHz mobile channel

    Publication Year: 1985, Page(s):366 - 374
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1012 KB)

    A series of field measurements were conducted to examine the transmission characteristics of different digital land mobile systems in the VHF/UHF frequency bands. This paper briefly describes these measurements, and then focuses on the measured data that describe the bipolar coding/FM modulation with a bit rate of 4800 bit/s and an RF channel spacing of 25 kHz. The basic error characteristics of t... View full abstract»

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  • Adaptive slow frequency-hopping system for land mobile radio

    Publication Year: 1985, Page(s):375 - 383
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1021 KB)

    The essential features of a novel adaptive slow frequency-hopping system are described. It is proposed that the system would operate in the heavily congested VHF private mobile radio bands by selecting currently inactive channels, hence increasing the overall spectral efficiency. A preliminary analysis of mutual interference is presented in full, the results of which indicate that a frequency-hopp... View full abstract»

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  • Relationship between base station transmitter multicoupling requirements and frequency planning strategies for cellular mobile radio

    Publication Year: 1985, Page(s):384 - 387
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (445 KB)

    Frequency assignment procedures in mobile radio systems generally aim at achieving a measure of intermodulation compatibility, and, in principle, provided sufficient numbers of channels are available and may be assigned with the minimum of restrictions, then this objective is achievable (at least as far as third-order products are concerned). However, in cellular systems, additional constraints ar... View full abstract»

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  • Experimental vehicle location system using decca navigator and dead-reckoning sensors

    Publication Year: 1985, Page(s):388 - 395
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1499 KB)

    An integrated vehicle location system is described which employs an automatic receiver of simple design for the Decca Navigator system, supplemented by an odometer and gymballed flux-gate compass. Data recorded on board the vehicle have been processed offline using a Kalman filter technique. Vehicle tracks are presented which show less than 70 m standard deviation of error over long routes in urba... View full abstract»

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  • High-user-density digital cellular mobile radio systems

    Publication Year: 1985, Page(s):396 - 404
    Cited by:  Papers (40)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1280 KB)

    Digital cellular mobile radio systems are described having partially overlapping cells that are based on road configurations, and in which the energy is radiated along the road from approximately street lamp elevations. One proposed system uses propagation frequencies in the vicinity of 900 MHz, employs adaptive differential pulse code modulation at 32 kbit/s and a minimum shift keying modem enabl... View full abstract»

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  • Towards a high-capacity digital cellular mobile radio system

    Publication Year: 1985, Page(s):405 - 415
    Cited by:  Papers (25)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (2039 KB)

    A futuristic mobile communication system is proposed, based on the integration of a high-capacity digital cellular mobile radio system with a packet-switched routing network. Every communication terminal, e. g. a telephone, viewphone or computer, is connected to the fixed part of the local area network (LAN) by short-distance radiocommunication. These terminals are deemed to be `mobiles¿¿, irrespe... View full abstract»

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  • Definition of a cellular mobile radio system

    Publication Year: 1985, Page(s):416 - 424
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1113 KB)

    The regulatory and commercial framework for the introduction of a cellular radio system in the UK is unusual, in that it calls for two competing networks to interwork interchangeably with a range of mobile units. Connection to the fixed telephone network is also required. The Total Access Communication System (TACS) has been defined to meet such conditions. A description is given of the bases for ... View full abstract»

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  • 900 MHz digital cordless telephone

    Publication Year: 1985, Page(s):425 - 432
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (2052 KB)

    The paper discusses several aspects of cordless telephony which are relevant to systems being discussed for use in the UK in the future. A variety of methods of arriving at traffic estimates are considered, including studies of population density in urban and suburban London. From these estimates it is shown that an allocation of at least forty channels will be needed to satisfy the demand of dome... View full abstract»

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  • Problems of mobile HF communication and techniques for performance improvement

    Publication Year: 1985, Page(s):433 - 440
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1078 KB)

    The paper first outlines the inherent strengths and weaknesses of mobile and fixed terminals in HF communication systems. Conventional HF system design and operating procedures are then described. The improvement in performance achievable by the use of various forms of diversity combining is quantified, and it is shown how a number of fixed HF terminals can be combined into a geographical diversit... View full abstract»

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Aims & Scope

The latest version of this title is Radar, Sonar & Navigation, IET.

Full Aims & Scope