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First International Conference on 3G Mobile Communication Technologies

2000

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Displaying Results 1 - 25 of 94
  • Resource management issues for UMTS

    Publication Year: 2000, Page(s):401 - 405
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (404 KB)

    One of the most important aspects of third generation systems employing W-CDMA is resource management, which should regulate the operation of a network in such a way that ensures the uninterrupted service provision to the existing connections and at the same time accommodates in an optimum way the new connection requests. This article presents issues concerning resource management and call admissi... 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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  • Space-time estimation techniques for UTRA system

    Publication Year: 2000, Page(s):281 - 287
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (548 KB)

    This paper investigates the space-time channel estimation techniques in a multiple-access communication receiver system that receives coded digital data modulated using DS-CDMA, with an antenna array in a multipath propagation environment. A spatial and temporal channel model has been implemented, which is built upon the understanding of multipath fading and Doppler spread with merging time delay ... View full abstract»

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  • Forward link Erlang capacity of 3G CDMA system

    Publication Year: 2000, Page(s):213 - 217
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (316 KB)

    We analyze the forward link Erlang capacity of the 3rd generation CDMA system with voice and data users. The forward link outage condition for 2G CDMA system is extended to the case of the 3rd generation CDMA system with voice and data users. By introducing a forward power control factor, we derive the forward link blocking probability and Erlang capacity with closed form View full abstract»

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  • An active feedback for wideband amplifier linearization

    Publication Year: 2000, Page(s):112 - 116
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (332 KB)

    A new active feedback network is proposed for amplifier linearization. The technique is analyzed theoretically and practical results demonstrate the linearization performance with two-tones, π/4 DQPSK and W-CDMA. This technique differs from available linearization techniques by performing both with narrow and wideband modulated signals. Also the linearization circuitry is simple and small in si... View full abstract»

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  • Strategic aspects of core network migration

    Publication Year: 2000, Page(s):24 - 27
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (292 KB)

    The problem every potential 3G operator has to face today is how to either migrate to or build from scratch the new networks that will offer new data services and applications to mobile subscribers. There are currently two different core network architectures being standardised, one is being specified in the context of UMTS phasel or release 99, the other one will be part of release 2000, the so-c... View full abstract»

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  • An efficient reservation-based dynamic channel assignment strategy

    Publication Year: 2000, Page(s):352 - 355
    Cited by:  Papers (8)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (236 KB)

    The guard channel scheme for radio channel allocation in cellular networks gives resource access priority to handoff calls over new calls in admission control. This reduces handoff call blocking probability significantly at the expense of a small increase in new calls blocking probability. The effectiveness of the guard channel scheme has been demonstrated under fixed channel assignment (FCA). In ... View full abstract»

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  • Real-time video communications over GPRS

    Publication Year: 2000, Page(s):426 - 430
    Cited by:  Papers (9)  |  Patents (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (420 KB)

    One of the stated aims of 3rd generation mobile communications systems is to provide enhanced multimedia services to the user. Such services will include an integration of video, high-quality audio and data services. This paper describes a real-time mobile video communications system which employs ETSI's GPRS mobile packet system as a mobile access medium. Subjective performance tests a... 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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  • Performance evaluation of a parallel fractional adaptive single-user receiver in a dynamic environment

    Publication Year: 2000, Page(s):108 - 111
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (304 KB)

    This paper investigates the behavior of one particular near-far resistant detector, the parallel fractional adaptive detector, in a dynamic environment. This detector belongs to the general family of minimum mean squared error (MMSE) detectors. This receiver does not require information regarding the signature waveforms and timing of all users, except for the timing of the desired user, and it doe... View full abstract»

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  • Migration to all-IP based UMTS networks

    Publication Year: 2000, Page(s):19 - 23
    Cited by:  Papers (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (396 KB)

    There has been a significantly increased interest in building future UMTS systems based on IP (Internet protocol) technologies. The major motivation is to have a common service platform and transport for 3G networks based on IP. This is also reflected in the establishment of the 3G.IP industry group and current 3GPP standardisation activities. This paper presents an overview of this trend and summ... View full abstract»

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  • 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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  • Data multiplexing strategies for mobile applications

    Publication Year: 2000, Page(s):421 - 425
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (380 KB)

    There is an increasing demand for sending different types of data over mobile communication systems. Sending different types of data simultaneously requires some multiplexing strategy. This paper focuses on multiplexing strategies for mobile applications to transmit different types of data. Here we propose several modifications to the ITU H.223 multiplexing standard, which makes communications mor... View full abstract»

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  • Adaptive antenna array system combining the adaptive beamformer with the interference canceller for wideband DS/CDMA

    Publication Year: 2000, Page(s):195 - 199
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (376 KB)

    We propose a scheme that combines the adaptive beamformer (ABF) and the interference canceller (IC) for wideband DS/CDMA. The high pass filter (HPF) and the IC of the proposed scheme consist of the ABF to lessen the computation time of the system. This proposed scheme is analyzed in wideband vector channels of a microcell environment. The proposed scheme provides a better cancellation of the multi... 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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  • Application of space-time coding techniques in third generation systems

    Publication Year: 2000, Page(s):276 - 280
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (372 KB)

    We consider the application of space-time processing techniques using multiple antennas to third generation mobile communication systems, which have been shown to enable substantial capacity improvements. We describe a technique for the evaluation of such schemes and apply it to some potential applications of the technique within the current third generation standards. We describe a simple techniq... View full abstract»

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  • Perfect channel modeling and simulation of measured wide-band mobile radio channels

    Publication Year: 2000, Page(s):288 - 293
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (388 KB)

    Various types of channel sounders have previously been developed with the aim to measure and to investigate the propagation characteristics of wide-band mobile radio channels in different environments. After post-processing the collected data, one often presents the measured power output of the channel as a function of the multipath propagation delay and the Doppler frequency. Such a function is k... View full abstract»

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  • Sensitivity of UMTS FDD system capacity and coverage to model parameters

    Publication Year: 2000, Page(s):224 - 229
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (392 KB)

    The techniques used for the design and optimisation of WCDMA systems are significantly different from those used in GSM/IS136 systems. It is difficult to consider any part of a WCDMA system in isolation-changes to a part of the system will ripple through the radio network, and may cause changes over a larger area than is the case with GSM/IS136 systems. This high degree of interactivity, together ... View full abstract»

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  • Improving the direction-of-arrival resolution via double code filtering in WCDMA

    Publication Year: 2000, Page(s):204 - 207
    Cited by:  Papers (3)  |  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (308 KB)

    This paper presents a new method for improving the azimuthal resolution at the base station of the WCDMA system employing antenna array. The method uses two covariance matrices resulting from double code filtering. The first matrix is extracted by the traditional de-spreading and results in noisy signal estimate. The other matrix is extracted by an orthogonal re-spread method. The orthogonal re-sp... View full abstract»

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  • Multiple code adaptive despreader for UTRA TDD

    Publication Year: 2000, Page(s):94 - 98
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (336 KB)

    A modified version of the minimum mean square error receiver to be used with UTRA TDD mode is presented in this paper. The structure is tested in a multipath fading channel and its equalisation and multipath access interference suppression characteristics are studied and compared with the traditional receiver and with a linear equaliser CDMA receiver View full abstract»

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  • The effects of inter-system interference in UMTS at 1920 MHz

    Publication Year: 2000, Page(s):103 - 107
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (432 KB)

    The Universal Mobile Telecommunications System (UMTS) is composed of an FDD and TDD mode. Both modes have an adjacent carrier at 1920 MHz. The implications thereof for system capacity are analysed. In this context, the FDD mode is assumed to account for full spatial coverage and the TDD mode is employed to cover areas with increased traffic `hot spots'. The separation distance of the TDD and FDD b... View full abstract»

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  • Simulation results and interference cancellation in UMTS downlink receiver

    Publication Year: 2000, Page(s):266 - 270
    Cited by:  Papers (1)  |  Patents (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (260 KB)

    We present here the results of the simulation trials in the UMTS downlink receiver. An SPW implementation of the downlink system is built and analyzed. A RAKE receiver with multiple fingers is employed in the UMTS downlink receiver to take advantage of the multipath channel. Each finger within the receiver performs channel estimation to obtain the channel coefficients. Performance curves for the r... View full abstract»

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  • CDMA mobile systems with tailor made power control to each mobile station

    Publication Year: 2000, Page(s):46 - 50
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (480 KB)

    Power control is an important issue in the capacity of DS-CDMA cellular systems to tackle the near-far problem, co-channel interference and varying signal strength in fading channels. In this paper, we propose an adaptive signal-interference-ratio (SIR) feedback power control technique so that the SIR threshold control level of each mobile station will be individually adjusted with respect to its ... View full abstract»

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  • Experiences of Ericsson's WCDMA evaluation system in the UK

    Publication Year: 2000, Page(s):14 - 18
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (372 KB)

    Ericsson has developed the WCDMA based evaluation system to demonstrate the potential of the 3rd generation (3G) mobile communications. It has been intended for field deployments on a limited scale in different parts of the world. In the UK, Ericsson has deployed a test network in Guildford, Surrey. The Guildford Test Network has been operational since February 1999, and in the process ... View full abstract»

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  • Supporting the successful deployment of third generation public cellular technologies-system dimensioning and network planning

    Publication Year: 2000, Page(s):156 - 160
    Cited by:  Papers (3)  |  Patents (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (668 KB)

    This text describes the implications upon system dimensioning and network planning when making the transition to third generation WCDMA based technology. The applicability of each process is demonstrated using illustrative examples of likely system operating scenarios. The challenges of accurately modelling WCDMA technology supporting mixed service types are described and the corresponding implica... View full abstract»

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