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IEE Proceedings - Communications

Issue 6 • Date Dec 1997

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Displaying Results 1 - 10 of 10
  • Novel architecture for ATM QoS management

    Publication Year: 1997, Page(s):412 - 418
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (680 KB)

    A novel architecture and an enhanced approach to a flexible, starvation-free ATM QoS managing function is proposed. To meet the stringent timing constraint of the delay QoSs, both high-speed sorter and subtractor are exploited to sort the priority value as well as to process the priority value. The subtractive policy is used to prevent starvation and to assign the priority of each output queue. In... View full abstract»

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  • Spreading code protocol enabling programmable complexity/performance for CDMA local wireless networks

    Publication Year: 1997, Page(s):395 - 401
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (604 KB)

    The paper introduces a novel spreading code protocol, the adaptive group-receiver code protocol, offering flexibility and stability under varying traffic conditions. In the protocol, terminals are divided into groups co-ordinated by central stations and a group-based receiver spreading code is used to manage the contention among users in the groups. The protocol can adaptively adjust the number of... View full abstract»

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  • Low-decoding-complexity TDM coded modulation with unequal error protection

    Publication Year: 1997, Page(s):372 - 380
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (652 KB)

    For time-division-multiplexed coded modulation schemes with unequal error protection (UEP) proposed in the literature, the receiver requires several independent Viterbi decoders to decode all classes of data. A new UEP coded modulation scheme is proposed which has the advantages that decoding can be done by using a single slightly modified Viterbi decoder and that good coding gains can still be pr... View full abstract»

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  • Analysis of uplink and downlink capacities for two-tier cellular system

    Publication Year: 1997, Page(s):405 - 411
    Cited by:  Papers (24)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (568 KB)

    Combining macrocells and microcells in a two-tier cellular system is highly attractive because it provides a balance between maximising the number of users per unit area and minimising the network control associated with handoff. The authors examine the system capacity of a two-tier cellular architecture employing three TDMA/CDMA strategies. Both the uplink and downlink are evaluated via mathemati... View full abstract»

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  • Two-stage nonlinear detector in DS/SSMA communications with impulse noise

    Publication Year: 1997, Page(s):387 - 394
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (780 KB)

    A new two-stage nonlinear detector for synchronous DS/SSMA communications in impulsive channels is presented and analysed. In the detector, an interference cancellation scheme is used such that the effect of the multiple-access on the system performance can be alleviated. For a multiuser system with long spreading sequences an approximate error probability is derived and shows that the new detecto... View full abstract»

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  • BCJR trellis construction for binary linear block codes

    Publication Year: 1997, Page(s):367 - 371
    Cited by:  Papers (1)  |  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (472 KB)

    A novel low-complexity trellis design technique for linear binary block codes is introduced. It is shown that, for block codes, the problem of permutation minimal trellis is very simple. For linear binary block codes, a heuristic algorithm for the reduction of trellis complexity is proposed. A reduction in trellis complexity is achieved by the implementation of a new permutation algorithm, which i... View full abstract»

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  • Investigation of overload control algorithms for SCPs in the intelligent network

    Publication Year: 1997, Page(s):419 - 423
    Cited by:  Papers (3)  |  Patents (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (508 KB)

    All nodes in the intelligent network (IN) must have an overload control mechanism which protects the node by rejecting calls when the load on the node is too high. Two examples of IN nodes are the service control point (SCP), which contains the service logic that is used to provide IN services, and the service switching point (SSP) which detects requests for IN services. The authors investigate ov... View full abstract»

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  • Cellular CDMA overlay situations

    Publication Year: 1997, Page(s):402 - 404
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (260 KB)

    An adaptive LMS filter is applied to a cellular CDMA overlay situation in order to reject narrowband interference in the mobile fading channel, ignoring channel white noise. Both the convergence and steady-state results of the LMS algorithm for the CDMA receiver are presented View full abstract»

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  • Signal detection over Rayleigh-fading channels with non-Gaussian noise

    Publication Year: 1997, Page(s):381 - 386
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (516 KB)

    The authors deal with the problem of the detection of waveforms over fading channels with impulsive noise, modelled as a compound-Gaussian, possibly correlated process. Starting with the optimum detector, which is actually unsuited to real-time implementation, they propose a sub-optimum scheme, with complexity. Moreover, they show that scheme can be further simplified for the important case of bin... View full abstract»

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  • Construction and comparison of periodic digital sequence sets

    Publication Year: 1997, Page(s):361 - 366
    Cited by:  Papers (8)  |  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (548 KB)

    Periodic digital sequences have been used in a wide range of communications applications. The paper aims to provide a concise, practical and up-to-date comparison of the properties of binary and non-binary sequences. The emphasis of the paper is on the constructions and parameter comparisons for various periodic sequence types to allow simple design and selection for a variety of engineering appli... View full abstract»

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