First International Conference on 3G Mobile Communication Technologies

2000

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Displaying Results 1 - 25 of 94
  • 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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  • Investigations into integrated location management in mobile multimedia networks

    Publication Year: 2000, Page(s):294 - 300
    Cited by:  Patents (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract |PDF file iconPDF (336 KB)

    Advanced software protocols for multimedia packet networks are currently designed, tested and, in some cases, fielded by a variety of organisations. Additionally, a variety of solutions are required to provide next-generation, highly-programmable technology solutions to eventually provide reliable, efficient, and secure communications of multimedia traffic over rapidly-deployable mobile adhoc netw... View full abstract»

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  • Advanced statistics for WCDMA communication system characterization

    Publication Year: 2000, Page(s):122 - 128
    IEEE is not the copyright holder of this material | Click to expandAbstract |PDF file iconPDF (496 KB)

    Higher-order statistics of random signals are reviewed. After some basic definitions and terminology are established, these statistics are applied to various example signals, including WCDMA formats. New models for amplifier heating and breakdown are described that depend on higher-order signal statistics. We show how higher-order statistics can be employed to predict performance degradation of am... 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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  • 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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  • Performance evaluation of multiple bit-rate traffic mixing on UTRA

    Publication Year: 2000, Page(s):411 - 415
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract |PDF file iconPDF (416 KB)

    An investigation on the impact of mixed traffic on UTRA performance is presented. The competition for resource between different types of services affects their individual throughput/delay characteristics and that of the overall system. The objective of the work is to characterise the diverse operating points of UTRA, providing reference data for radio resource management optimisation 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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  • Predicting and measuring quality of service for mobile multimedia

    Publication Year: 2000, Page(s):451 - 455
    Cited by:  Papers (1)  |  Patents (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract |PDF file iconPDF (360 KB)

    Telecommunications is continually evolving from its historical remit of offering speech over fixed lines to an increasingly feature-rich and mobile environment. The next generation of mobile networks, such as the General Packet Radio Service (GPRS) and the Universal Mobile Telecommunications Service (UMTS) will be able to offer multimedia (combined audio and video) using the packet-based, connecti... 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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  • 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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  • 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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  • 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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  • 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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  • 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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  • A multiservice dimensioning procedure for 3G CDMA

    Publication Year: 2000, Page(s):406 - 410
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract |PDF file iconPDF (568 KB)

    This paper describes a multiservice dimensioning procedure developed to address the problem of evaluating the number of CDMA cells needed in a given area to handle the required traffic with the specified quality. It combines a multiservice CDMA model with a multiservice Erlang-B like algorithm. The procedure has been implemented in a software package called Ameba View full abstract»

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  • Reverse link gating in cdma2000

    Publication Year: 2000, Page(s):65 - 69
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract |PDF file iconPDF (276 KB)

    In this paper, we propose reverse link transmission (both traffic and pilot) to be gated 50% of the time for 1/8 rate speech transmission and show that significant talk time and reverse link capacity improvement can be achieved out of this gating scheme in cdma2000. The position and duration of the gating periods have a significant effect on the performance. The optimal scheme is discussed, and an... 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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  • 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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  • 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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  • UMTS capacity and planning issues

    Publication Year: 2000, Page(s):218 - 223
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract |PDF file iconPDF (540 KB)

    The spectral capacity limits of wideband code division multiple access (WBCDMA) systems are difficult enough to predict in regular hexagonal networks where the interaction of link and system level often lead to nonintuitive results. Attempting to define the capacity in more realistic environments is complicated further as the variation of traffic and site distribution has a significant impact on o... View full abstract»

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  • Channel model implementation for evaluation of location services

    Publication Year: 2000, Page(s):446 - 450
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract |PDF file iconPDF (404 KB)

    Simulation and evaluation of location services presents a number of new problems in the area of stochastic channel modelling which conventional models do not account for. Such problems are modelling of line of sight (LOS) probabilities, LOS to non-line of sight (NLOS) power ratios, NLOS excess propagation time delay, out of cell radio propagation/coverage, and spatial correlation factors. A two le... 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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  • W-CDMA capacity analysis using GIS based planning tools and MATLAB simulation

    Publication Year: 2000, Page(s):230 - 234
    IEEE is not the copyright holder of this material | Click to expandAbstract |PDF file iconPDF (460 KB)

    The evolution of cellular systems towards third generation (3G) or IMT-2000 seems to have a tendency to use W-CDMA as the standard access method, as ETSI decisions have showed. However, there is a question about the improvements in capacity and the wellness of this access method. One of the aspects that worry developers and researchers planning the third generation is the extended use of the Inter... View full abstract»

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  • Performance analysis of reverse link wideband CDMA cellular system under fast closed-loop power

    Publication Year: 2000, Page(s):51 - 55
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract |PDF file iconPDF (332 KB)

    Performance of a reverse link wideband CDMA cellular system with fast closed-loop power control is studied in this paper. The channel is modelled as frequency selective fading. The probability of bit error, P c, is used as the performance criterion. A mathematical formulation is derived which takes into consideration the updating frequency of the power control mechanism, the fading rate... View full abstract»

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