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First International Conference on 3G Mobile Communication Technologies

2000

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Displaying Results 1 - 25 of 94
  • Evaluation of W-CDMA network performance and impact of soft handover using dynamic network simulations

    Publication Year: 2000, Page(s):347 - 351
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1012 KB)

    Soft handover is an essential technique for code-division multiple-access (CDMA) mobile cellular communication systems. The main benefits of soft handover are the fading margin improvement and a higher uplink capacity while the disadvantages include the overhead in the radio access network and the increased downlink interference due to the transmission from multiple base stations. The investigatio... View full abstract»

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  • Mobility management for the support of handover within a heterogeneous mobile environment

    Publication Year: 2000, Page(s):341 - 346
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (360 KB)

    Intra-technology handover algorithms already exist for each cellular wireless technology. Although these algorithms will continue to evolve with their respective technologies no revolutionary change is justified. No handover algorithm yet exists for the support inter-network handovers. In this paper, a mobility manager function is defined and its support of a hierarchy of handover algorithms is pr... View full abstract»

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  • Wideband flexible microwave radio-steps towards the software radio

    Publication Year: 2000, Page(s):336 - 340
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (384 KB)

    The paper discusses the design and development of a microwave radio transceiver at 1.4 GHz, which implements multirate signal processing algorithms to provide variable channel bandwidths, symbol rates on the channel, two constellation PSK modulation schemes, and wide frequency tuning range using fractional-N synthesis to achieve fine frequency resolution and low noise. To avoid RF switching, there... View full abstract»

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  • First International Conference on 3G Mobile Communication Technologies (Conf. Publ. No.471)

    Publication Year: 2000
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (392 KB)

    The following topics were dealt with: third generation network trials and testing; migration to 3G mobile radio networks; power control; system performance and modelling; time division duplex; receiver techniques; IP techniques; cell and network planning; error correction and coding; smart antennas; 3G capacity analysis; handover; interference cancellation and multi-user detection; positioning and... View full abstract»

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  • Overcoming the challenges of lower layer protocol reconfiguration for software radio based mobile terminals

    Publication Year: 2000, Page(s):331 - 335
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (412 KB)

    Dynamic reconfiguration of lower layers of the protocol stacks used in communications terminals is key to the development of future multi-mode software radios. Together with the use of software downloading, future terminals will become a platform to support the deployment of yet unspecified services and applications. This paper details experiments undertaken that have demonstrated a new way to dow... View full abstract»

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  • Technology requirements of the 3GPP-TDD terminal

    Publication Year: 2000, Page(s):89 - 93
    Cited by:  Papers (1)  |  Patents (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (456 KB)

    This paper examines the technology requirements for the implementation of the 3GPP-TDD mode and discusses how the terminal complexity of the TDD mode compares to that of the FDD mode. An overview of the TDD mode covers the frequency bands, the synchronous nature, and the physical channel structure. The differences in the inner receiver implementation between the TDD mode and the FDD mode are highl... View full abstract»

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  • Analysis of integrated voice and data for GPRS

    Publication Year: 2000, Page(s):436 - 440
    Cited by:  Papers (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (284 KB)

    In multimedia mobile communications, several type of services such as voice, WWW, FTP with different quality of services are to be supported. Some services like voice are delay-sensitive, whereas the other can tolerate more delay. Based on different QoS, the scheme of sharing the radio resources plays an important role in network dimensioning. We present a new analysis for integrated services cons... View full abstract»

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  • Channel estimation for multi-user detector DS-CDMA receivers

    Publication Year: 2000, Page(s):261 - 265
    Cited by:  Patents (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (324 KB)

    We consider a multi-user detector for the downlink of a DS-CDMA system with similar parameters to the UTRA-TDD specification, placing particular emphasis on the various trade-offs which must be accommodated to obtain a sufficiently accurate estimate of the multipath channel and thus permit reliable data transmission. We demonstrate that choosing parameters solely to optimise the mean square error ... View full abstract»

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  • Terminal reconfigureability-the software download aspect

    Publication Year: 2000, Page(s):326 - 330
    Cited by:  Papers (3)  |  Patents (24)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (500 KB)

    The reconfigureability of software radios provides the means to alter hardware and software settings within a mobile terminal and therefore requires the secure and reliable download of configuration software from any possible software source. This paper presents a viable software download protocol and describes the requirements on the supporting infrastructure. A detailed signalling message sequen... View full abstract»

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  • A sub-optimum MLSE detector with a folded state-transition trellis preselection stage

    Publication Year: 2000, Page(s):271 - 275
    Cited by:  Papers (1)  |  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (388 KB)

    The maximum-likelihood sequence estimation (MLSE) multiuser detector has a very good performance but at the expense of the exponentially increasing number of states with the number of users. A scheme that folds up the original trellis to reduce the number of states involved has been proposed by Sim and Cruickshank (see Proceedings of the 1999 49th IEEE Vehicular Technology Conference, p.846-50, 19... View full abstract»

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  • Burst error correction capabilities of turbo codes in mobile environments

    Publication Year: 2000, Page(s):176 - 180
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (332 KB)

    Interleaving is a standard signal processing technique used in a variety of communication systems. An application of interleaving is in turbo coding schemes where two or more interleaved versions of the same information sequence are encoded. The interleaver allows the component decoders to generate separate estimates of the a posteriori probabilities for a given information symbol based on data so... View full abstract»

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  • Practical acquisition issues for UMTS

    Publication Year: 2000, Page(s):371 - 375
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1112 KB)

    When a UMTS mobile (UE) is powered-up it must first synchronise with a local Node B before it can use the network. Synchronisation must be achieved in the time, frequency and code domains. Time synchronisation is a two-part process, synchronising first to the primary synchronisation channel (PSCH) to find the power control period (PCP) boundaries, and then to the secondary synchronisation channel ... View full abstract»

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  • Service disciplines performance for WWW traffic in GPRS system

    Publication Year: 2000, Page(s):431 - 435
    Cited by:  Papers (2)  |  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (416 KB)

    We investigate, in this paper, the performance of service disciplines in the General Packet Radio Service (GPRS) system. The GPRS system is a new additional GSM service, which provide packet switched data services over the GSM network and a packet access to data networks. Using either the best effort service or guaranteed performance service, the service discipline affects considerably the MAC lay... View full abstract»

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  • A new development system for reconfigurable digital signal processing

    Publication Year: 2000, Page(s):306 - 310
    Cited by:  Papers (1)  |  Patents (60)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (416 KB)

    Requirements for future mobile communications systems are demanding. This paper presents techniques and a development system for the research, design & development of reconfigurable digital signal processing for software radio based systems. Software radio is an essential technology required for the realisation of 3G to meet requirements such as seamless global roaming and protocol independenc... View full abstract»

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  • Channel prediction based power control in W-CDMA systems

    Publication Year: 2000, Page(s):41 - 45
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (328 KB)

    Knowledge of the radio channel conditions help in improving the performance of the receiver as well as in maintaining the quality of service required by different applications supported by the third generation wireless systems. Power control is a method by which the power transmitted by each user is regulated in order to maintain the received signal to interference ratio above a threshold to maint... View full abstract»

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  • Co-channel interference cancellation techniques for antenna array assisted multiuser OFDM systems

    Publication Year: 2000, Page(s):256 - 260
    Cited by:  Papers (18)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (476 KB)

    Minimum mean square error (MMSE)-based multiple-antenna assisted co-channel interference suppression/space division multiple access (SDMA) schemes designed for OFDM have drawn wide interest. In this article, parallel interference cancellation (PIC) is proposed and studied in comparison to maximum likelihood sequence estimation (MLSE) based schemes. The best design trade-off was constituted by the ... View full abstract»

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  • Re-configurable radio systems and networks

    Publication Year: 2000, Page(s):321 - 325
    Cited by:  Patents (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (532 KB)

    Re-configurable radio systems and networks is potentially the next major leap forward in mobile and wireless communications. The benefits of re-configurable radio techniques in handset design, particularly in the light of the many existing air interface standards, are rapidly becoming clear, and this same technology is facilitating the evolution of flexible base-station platforms. In particular, t... View full abstract»

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  • Sectorization gain in CDMA cellular systems

    Publication Year: 2000, Page(s):70 - 75
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (420 KB)

    This paper presents an analytical method for estimation of sectorization gain in CDMA cellular systems. Non-ideal antenna radiation patterns are investigated in order to identify the factors which limit the sectorization gain. These include environment related factors, i.e. path loss exponent and standard deviation of shadowing, handover schemes i.e. hard, soft and soft/softer handovers, and diffe... View full abstract»

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  • The effects of delay spread for cellular network planning using the combination algorithm for total optimisation

    Publication Year: 2000, Page(s):171 - 175
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (532 KB)

    The combination algorithm for total optimisation (CAT) is a new base-station placement optimisation tool for cellular network planning. The CAT algorithm operates with two external modules, a propagation module and a capacity module that provide the algorithm with the necessary information to solve the base-station placement problem. In this paper new features based on parameters such are delay sp... View full abstract»

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  • An iterative DOA algorithm for a space-time DS-CDMA RAKE receiver

    Publication Year: 2000, Page(s):208 - 212
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (380 KB)

    Base station antenna arrays are a promising method for providing significant capacity performance increases for third generation multimedia cellular mobile radio systems. By determining the direction-of-arrival (DOA) of a desired user the base station can exploit the spatial dimension known as space division multiple access. Many eigendecomposition methods are popular for their high-resolution pro... View full abstract»

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  • Practical W-CDMA receiver and transmitter system design and simulation

    Publication Year: 2000, Page(s):117 - 121
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (428 KB)

    As terminal system designers begin to get to grips with the air-interface technology of W-CDMA and the other IMT-2000 technologies, there is a demand for a system-level simulation environment that is truly cross-disciplinary. The 3G and software radio concepts require an unprecedented degree of amalgamation between RF and DSP technology-areas that traditionally have been well separated. This point... View full abstract»

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  • A novel implitation of reverse link acquisition

    Publication Year: 2000, Page(s):367 - 370
    Cited by:  Papers (1)  |  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (256 KB)

    A simple and economic scheme for coarse code acquisition of reverse link for UMTS (FDD-WCDMA) application is presented. The acquisition performance is evaluated in terms of probability of false detection (pf) in a multiple cell and multipath fading operating environment. The large timing uncertainties region of acquisition in the presence of fading channel and multiple access interference may impo... View full abstract»

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  • A two step architecture for an adaptive receiver

    Publication Year: 2000, Page(s):301 - 305
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (412 KB)

    The number of services on heterogeneous wireless networks is dramatically increasing. The main drawback of this explosion of services is that consumers need more and more terminals. Consequently there is a current and growing interest in multi-mode terminals (multi-services, multi-networks). Such terminals could be implemented using software techniques for terminal reconfiguration purposes. In thi... View full abstract»

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  • Power control in UMTS Release '99

    Publication Year: 2000, Page(s):36 - 40
    Cited by:  Papers (11)  |  Patents (29)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (472 KB)

    The CDMA technology used in UMTS relies on accurate power control techniques, not only for maximising the battery life of mobile terminals and maintaining signal quality, but also as an important means of optimising system capacity by controlling interference. This paper provides a detailed review of the power control mechanisms specified for UMTS Release '99, with the primary emphasis being on th... View full abstract»

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  • An adaptive handover boundaries algorithm

    Publication Year: 2000, Page(s):251 - 255
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (436 KB)

    Cellular network design is based on worst case traffic scenarios that a certain cell might experience. However, reality has shown that traffic tends to vary quite a lot both on a short-term and long-term basis. Although the long-term changes of the traffic can be accommodated by adding capacity where required, the short-term changes are very difficult to accommodate, as these need almost real-time... View full abstract»

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