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IEE Proceedings - Communications

Issue 3 • Date June 1999

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Displaying Results 1 - 10 of 10
  • Heuristic approach for optimal channel assignment in cellular mobile systems

    Publication Year: 1999, Page(s):196 - 200
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (477 KB)

    An efficient heuristic algorithm is proposed for the channel assignment problem in cellular mobile systems. The merit of the algorithm is the improved repetitive ordering of requirements in sequences using the deterministic assignment difficulties. Benchmark problems are employed to validate the performance merit of the proposed algorithm and five other well-known channel assignment schemes. The r... View full abstract»

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  • Constant modulus receivers under reduced noise amplification objective

    Publication Year: 1999, Page(s):145 - 149
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (364 KB)

    A family of algorithms is presented far the adaptation of a fractionally spaced FIR channel equaliser for binary data. These algorithms incorporate an additive adjustment to the standard constant modulus objective so as to facilitate a reduction in the noise amplification factor. The novel algorithms essentially seek to balance the constant modulus objective of the equalisation with the noise powe... View full abstract»

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  • Nonlinear signalling with unevenly distributed phase states

    Publication Year: 1999, Page(s):157 - 162
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (532 KB)

    A class of signals called nonlinear uneven signals is constructed by extending regular nonlinear signals and employing unevenly distributed phase states. Nonlinear uneven signals are constructed with CPFSK, CPM and PSK signals at two different numbers of states N=4 and N=8. Numerical results indicate that nonlinear uneven signals can achieve distances significantly higher than those of regular non... View full abstract»

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  • Node-oriented optimal flow control protocols for ATM networks

    Publication Year: 1999, Page(s):171 - 179
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (820 KB)

    Optimal flow control protocols for ATM networks that satisfy grade of service (GOS) requirements and fairness criteria are developed. The authors propose a novel node-oriented approach for flow control based on a modified definition of power. In this approach, bandwidth allocation and enforcement are carried out for groups of users multiplexed at nodes rather than for each individual user as in pr... View full abstract»

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  • Performance calculation of cellular radio systems over fading channel

    Publication Year: 1999, Page(s):201 - 207
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (448 KB)

    Detailed formulas in closed or approximate forms are presented for calculating the distribution of the received bit energy-to-total-noise ratio. The parameters of Rayleigh fading statistics can be obtained from the multipath intensity profile. No predetermined number of effective multipaths is required and is decided during computation. The saddlepoint method can greatly reduce the calculation com... View full abstract»

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  • Synchronisation techniques for a CCMA system using neural nets

    Publication Year: 1999, Page(s):150 - 156
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (516 KB)

    A new synchronisation technique for a T out of N-user multiple access adder channel (MAC) with binary inputs is described. The application of artificial neural networks at the decoder is considered as a fast and robust technique for filtering, sorting, shifting and decision making upon the incoming MAC data. An efficient decoding technique is introduced for the extraction of block synchronisation ... View full abstract»

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  • Design of link-state alternative path routing protocols for connection-oriented networks

    Publication Year: 1999, Page(s):163 - 170
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (604 KB)

    Alternative path routing (APR) can be used to achieve efficient routing in communications networks. Several approaches to APR in connection-oriented networks running a link-state routing protocol are described, and their performance evaluated using call-level simulations. A source routing paradigm is assumed where primary paths for calls are computed only at source nodes. However, depending on the... View full abstract»

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  • Congestion control with a new fairness criterion for multicast ABR service in ATM networks

    Publication Year: 1999, Page(s):181 - 184
    Cited by:  Papers (2)  |  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (344 KB)

    The authors present an explicit-rate (ER) based congestion control scheme for multicast available bit rate (ABR) service in asynchronous transfer mode (ATM) networks which support bandwidth allocation with a new fairness criterion, and analyse the stability of the network for both the unicast connections case and the unicast-plus-multicast connections case. Specifically, under the new fairness cri... View full abstract»

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  • Performance analysis and design of pilot-symbol aided TCM for a Rayleigh fading channel

    Publication Year: 1999, Page(s):185 - 190
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (444 KB)

    A Chernoff bound is derived on the pairwise error event probability of pilot-symbol aided TCM schemes with L-fold space diversity in a Rayleigh fading channel. In the scheme, pilot-symbols are inserted periodically to estimate the channel characteristics. The fading processes experienced by the pilot-symbols are used to estimate those suffered by the data symbols using interpolation. The estimated... View full abstract»

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  • Comparison of a distributed dynamic channel assignment scheme with multichannel CSMA in a terrestrial radio environment

    Publication Year: 1999, Page(s):191 - 195
    Cited by:  Papers (3)  |  Patents (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (384 KB)

    The comparison is explored between call-oriented distributed channel assignment strategies used in UFDMA, DECT, and PACS-UB, and packet-oriented multichannel CSMA. Analysis is developed for a UFDMA call-oriented scenario for channel sense delays, which are either fixed or increase according to the number of channels in the allocation. It is shown that when the channel sense delay becomes a large f... View full abstract»

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