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IEE Colloquium on Radio Systems for Rural Communications

27 Jan 1993

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Displaying Results 1 - 9 of 9
  • Radiowave propagation over a 4-segment piece linear terrain profile

    Publication Year: 1993, Page(s):5/1 - 5/4
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (160 KB)

    This paper presents a path integral solution to the problem of paraxial radiowave propagation over terrain. The analysis inherently takes into account the reflected, space and diffracted waves, and considers finite impedance rough ground. The solution is in the form of a series of one-dimensional integrals which incorporate the Fresnel integral. An accurate numerical method for evaluating these in... View full abstract»

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  • Renewable energy supplies for radio systems for servicing rural customers

    Publication Year: 1993, Page(s):6/1 - 6/4
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (200 KB)

    BT has used solar powered equipment for about 18 years, and there are three such known installations in the UK local access network (all powering single channel radio sets). However, these are all very low powered applications (average consumption less than 1 W), and can be satisfied from a modest sized solar panel float-charging a small battery. This paper describes a further example, from the BT... View full abstract»

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  • Packet synchronisation for a rural telephone network

    Publication Year: 1993, Page(s):7/1 - 7/6
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (240 KB)

    This paper presents an analysis of a frame synchronisation algorithm suitable for use in a time division duplex link. Frame synchronisation is maintained in the conventional manner by the use of short frame alignment words (FAWs) embedded in the data stream. To facilitate fast initial frame synchronisation an embedded data packet with a long FAW is transmitted as part of the link set-up procedure.... View full abstract»

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  • IEE Colloquium on `Radio Systems for Rural Communications' (Digest No.018)

    Publication Year: 1993
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (16 KB)

    The following topics were dealt with: rural radiotelephone networks and systems; modulation, propagation and detection aspects; renewable energy supplies; packet synchronisations; and simulation View full abstract»

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  • Parallel computation simulation of a large exchangeless radio network

    Publication Year: 1993, Page(s):8/1 - 8/9
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (356 KB)

    In a rural radio telephony system design it is proposed that each village be provided with one radio unit consisting of two transceivers, two omnidirectional antennas, at least one telephone, and a control unit. With such equipment a cluster of villages will form a local area radio network. Clusters of villages will be linked via gateways, with each gateway linking such a local network to the exis... View full abstract»

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  • Communications via satellite and research collaboration with a developing country

    Publication Year: 1993, Page(s):1/1 - 1/4
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (236 KB)

    This paper presents the experiences of conducting an international collaboration in research and development of novel rural communications solutions between the Universities of Southampton, Warwick and Dar es Salaam. Some of the solutions, particularly regarding communications between the remote sites, are discussed View full abstract»

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  • Modulation and radio transmission aspects of the distributed rural radio telephone system

    Publication Year: 1993, Page(s):4/1 - 4/6
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (204 KB)

    The system is digital, with time-division-duplex. An equivalent baseband data rate of either 80 or 40 kb/s is foreseen, depending on the speech CODEC standard chosen. Omnidirectional antennas must be used Solar power is likely to be used in most locations, as there will be little infrastructure in many of the regions where the system find implementation. A practical linear modulation transmitter i... View full abstract»

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  • Non-coherent detection of narrow-band modulation for use in an advanced rural radio-telephone network

    Publication Year: 1993, Page(s):3/1 - 3/4
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (160 KB)

    This paper addresses work being carried out as part of a programme of research into rural radio-telephone communications. Key areas considered and investigated include filtering strategies, error performance and phase integration after frequency discrimination. Some of the specific design aspects and considerations of noncoherent detection of π/4 DQPSK modulation adopted for use in such a netwo... View full abstract»

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  • A distributed network radio system appropriate to rural telephony

    Publication Year: 1993, Page(s):2/1 - 2/8
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (344 KB)

    The paper describes the concept of a distributed radio telephone system appropriate to the specific needs of users in small villages in developing countries. Although a circuit switched system, it has many of the characteristics of a packet radio system. The factors which affect the performance limits of the network are discussed and the results of simulation of its connectivity are presented View full abstract»

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