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Ninth IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (Cat. No.98TH8361)

8-11 Sept. 1998

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  • Personal, Indoor and Mobile Radio Communications '98

    Publication Year: 1998, Page(s):0_3 - 0_16
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    Freely Available from IEEE
  • Author index

    Publication Year: 1998, Page(s):1575 - 1581
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    Freely Available from IEEE
  • Using higher order constellations with minimum mean square error (MMSE) receiver for severe multipath CDMA channel

    Publication Year: 1998, Page(s):1035 - 1039 vol.3
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (436 KB)

    Third generation wireless systems are expected to be characterized by high data rates and multimedia traffic. This paper is a preliminary investigation to determine if two dimensional higher order constellations, in conjunction with code division multiple access (CDMA), can be used to support the data communication needs of such systems. We compare the performance of QPSK and 16-QAM in a high mult... View full abstract»

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  • Analysis of 16-QAM over a nonlinear channel

    Publication Year: 1998, Page(s):1325 - 1329 vol.3
    Cited by:  Papers (6)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (356 KB)

    This paper derives the symbol error probability of a 16-QAM modulation scheme that undergoes nonlinear distortion as a result of power amplification. The performance degradation is computed when the receiver does not compensate for the amplitude saturation effects and a relatively simple method that does not resort to complex processing and equalization is proposed and analyzed to compensate for t... View full abstract»

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  • An adaptive filtering PN code acquisition scheme with improved acquisition based capacity in DS/CDMA

    Publication Year: 1998, Page(s):1486 - 1490 vol.3
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (392 KB)

    The acquisition-based capacity of a DS/CDMA system is defined as the maximum number of simultaneous users that can achieve PN code acquisition with certain reliability. This paper introduces a novel PN code acquisition scheme utilizing an LMS adaptive filter structure to estimate the delay offset of the desired user in the presence of multiple access interference. It is shown that the adaptive fil... View full abstract»

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  • Personal computing and communication-a Swedish strategic research program

    Publication Year: 1998, Page(s):1570 - 1574 vol.3
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (536 KB)

    This paper describes a strategic research program in personal computing and communication. The program was initiated by the Swedish Foundation for Strategic Research and started in 1997. The main objectives for the program are to promote multidisciplinary research in computing and communication and to initiate cooperation between research groups within academia as well as between industry and acad... View full abstract»

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  • CDMA reverse link capacity in a Manhattan like microcellular system

    Publication Year: 1998, Page(s):1029 - 1034 vol.3
    Cited by:  Papers (2)
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    In this paper, the effect of the hard and soft handoff on the reverse link capacity for a CDMA Manhattan like microcellular system is evaluated. We obtain analytical expressions for the relative other-cell interference factor as a function of the breakpoint, the cell radio, the variance of the random variation and the propagation path loss exponents for both hard and soft handoff. It is shown that... View full abstract»

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  • Analysis of GSM HSCSD service with channel allocation constraints

    Publication Year: 1998, Page(s):1511 - 1515 vol.3
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (424 KB)

    A mathematical model for analyzing the new GSM HSCSD (high speed circuit switched data) service specified by the European Telecommunications Standards Institute (ETSI) as a part of the GSM phase 2+ standard is presented. The study is conducted using a multidimensional Markov chain for a system carrying both HSCSD and the pre existing voice traffic. The key parameters which control the new data ser... View full abstract»

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  • Equalization of satellite UMTS channels using RBF networks

    Publication Year: 1998, Page(s):1250 - 1254 vol.3
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (308 KB)

    The paper proposes a radial basis function (RBF) neural network (NN) approach to satellite universal mobile telecommunication system (S-UMTS) channel equalization. Two main problems arise in S-UMTS communications: (i) non-linear distortions which are caused by the onboard nonlinear power amplifiers, and (ii) multipath propagation. This paper shows that RBF networks are particularly well suited to ... View full abstract»

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  • Frequency stabilized direct GMSK modulator

    Publication Year: 1998, Page(s):1319 - 1324 vol.3
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (588 KB)

    A phase locked loop based architecture is proposed for generation and frequency stabilization of direct Gaussian minimum shift keying (GMSK) at microwave and millimeterwave frequencies. A continuous phase frequency shift keyed (CPFSK) signal with a modulation index of 0.5 is produced at the desired output frequency using a full 360 degree linear continuous phase modulator that is controlled by the... View full abstract»

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  • Dynamic resource allocation with interference avoidance for fixed wireless systems

    Publication Year: 1998, Page(s):1433 - 1437 vol.3
    Cited by:  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (520 KB)

    In this paper, we propose an inter-cell interference management technique, called dynamic resource allocation with interference avoidance (DRA-IA), for fixed broadband wireless systems with narrow sectors or equipped with fixed or adaptive array antennas. The basic idea of DRA-IA is for every base to periodically “turn-off” each of its beams (sectors) for a certain amount of time. This... View full abstract»

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  • A predistorter for nonlinear distortion in multi-code CDMA systems

    Publication Year: 1998, Page(s):1481 - 1485 vol.3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (404 KB)

    In this paper, we present a predistorter for compensating for nonlinear distortion introduced by high power amplifiers (HPAs) employed in multi-code code division multiple access (CDMA) systems. Since the multi-code CDMA system has the multi-level property in its signal amplitude, the performance of the system is severely degraded by the nonlinear effect of the HPA in the transmitter. In order to ... View full abstract»

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  • Optimization approach to prioritized transmitter removal in a multiservice cellular PCS

    Publication Year: 1998, Page(s):1565 - 1569 vol.3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (460 KB)

    We propose a transmitter power control scheme that considers service priority in removal of transmitters under heavy traffic situations. This scheme is for the next generation PCS supporting different classes of wireless services. In developing the scheme we have formulated the prioritized transmitter removal into a manageable optimization problem and used the Lagrangian relaxation technique. Comp... View full abstract»

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  • Other cell interference and capacity of power controlled CDMA in wireless fixed access networks

    Publication Year: 1998, Page(s):1023 - 1028 vol.3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (456 KB)

    We study here the reverse link interference of a power controlled CDMA network in wireless fixed access deployments. We show that the directionality of the subscriber antenna unit may significantly reduce the other cell interference and consequently increase the system frequency reuse. The frequency reuse gain is strongly dependent on the channel statistics as well as the beamwidth of the subscrib... View full abstract»

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  • A comparison of GSM receivers for fading multipath channels with adjacent and co-channel interference

    Publication Year: 1998, Page(s):1506 - 1510 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (504 KB)

    In this paper, we evaluate low complexity detectors for use in the GSM system. In particular, we compare the performance of decision feedback equalization (DFE) and nonlinear data directed estimation (NDDE) to that of the optimal maximum likelihood sequence estimation (MLSE). Establishing the performance of the basic NDDE detector is a first step in investigating the applicability of block transmi... View full abstract»

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  • Power control for wireless data based on utility and pricing

    Publication Year: 1998, Page(s):1427 - 1432 vol.3
    Cited by:  Papers (96)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (612 KB)

    We develop a framework for power control for wireless data services based on economic concepts of utility and pricing. Our approach is based on a model for the level of satisfaction (utility) a wireless data user derives from using the system. Using this model, we present a distributed power control scheme that maximizes the utility of each user. Formulating this algorithm as a non-cooperative gam... View full abstract»

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  • Traffic controlled spatial reuse TDMA in multi-hop radio networks

    Publication Year: 1998, Page(s):1203 - 1207 vol.3
    Cited by:  Papers (26)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (352 KB)

    Spatial reuse TDMA is an access scheme for multi-hop radio networks. The idea is to increase capacity by reusing time slots when possible. A time slot can be reused when the radio units are geographically separated such that small interference is obtained. Of course, spatially reusing the channel resource can be applied to other access schemes such as FDMA and CDMA. Here, we present an algorithm f... View full abstract»

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  • Energy efficiency analysis of a multichannel wireless access protocol

    Publication Year: 1998, Page(s):1096 - 1100 vol.3
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (516 KB)

    When user terminals powered by a finite battery source are used for wireless communications, energy constraints are likely to influence the design/choice of media access protocols. We analyze the energy efficiency of a multichannel wireless access protocol using a finite energy source in a mobile radio environment. The average number of correctly transmitted packets for a given amount of allocated... View full abstract»

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  • CDMA downlink code acquisition performance in frequency-selective fading channels

    Publication Year: 1998, Page(s):1476 - 1480 vol.3
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (504 KB)

    In this paper, the performance of some code acquisition schemes are studied in the downlink of DS-CDMA systems. The conventional matched filter, the minimum variance method, the MUSIC algorithms and the eigenvector method based delay acquisition schemes are studied in a frequency-selective fading channel. The three last algorithms are based on different estimation schemes for the inverse of the sa... View full abstract»

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  • Grouping cells in PCS networks

    Publication Year: 1998, Page(s):1560 - 1564 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (516 KB)

    Personal mobility and terminal mobility which are viable through wireless access to communication networks are the most fundamental goals of personal communication services (PCS). The technology needed for the wireless access in PCS networks is generally provided by the cellular networks and intelligent networks (IN). In cellular networks, the wireless mobile terminals (WMT) communicate with base ... View full abstract»

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  • CFAR TMDA burst detection schemes for constant modulus signals

    Publication Year: 1998, Page(s):1235 - 1239 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (424 KB)

    In this paper, the performances of burst detection schemes which employ constant false-alarm rate (CFAR) algorithms are analyzed and compared. These schemes can be used for a typical time division multiple access (TDMA) protocol. The burst detection probabilities and corresponding false-alarm probabilities are derived to understand the effect of the received signal quality degradation at the recei... View full abstract»

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  • Uplink system performance of high-speed IS-95 CDMA with mixed voice and bursty data traffic

    Publication Year: 1998, Page(s):1018 - 1022 vol.3
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (580 KB)

    Recently, the CDMA Development Group (CDG) and TIA-TR45.5 have been considering proposals using multiple codes to provide high-speed data services in IS-95 CDMA systems. Though some aspects of the high-speed CDMA performance have been studied previously, the impact of bursty data traffic dynamics has not been fully investigated. This paper evaluates the high-speed CDMA system performance with mixe... View full abstract»

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  • Matched filter acquisition in fixed multipath channel

    Publication Year: 1998, Page(s):1501 - 1505 vol.3
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (404 KB)

    This paper introduces analytical results for a DS spread spectrum system with matched filter code acquisition in a fixed multipath channel. The performance measure is the mean acquisition time. Constant false alarm rate criteria are used as the threshold setting rule for the comparator. The energies of the multipath components are combined already in the acquisition process by using a chip level p... View full abstract»

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  • Interference analysis of a total frequency hopping GSM cordless telephony system

    Publication Year: 1998, Page(s):1525 - 1529 vol.3
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (608 KB)

    We present an interference analysis which reveals capacity reserves for a hierarchical GSM radio network. In the investigated concept a low-power cordless telephony system reuses the frequencies of a cellular GSM system based on total frequency hopping (T-FH) multiple access. Based on a novel simulation method, which considers the dynamics of a T-FH cellular network, we present results for differe... View full abstract»

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  • Downlink calibration requirements for the TSUNAMI (II) adaptive antenna testbed

    Publication Year: 1998, Page(s):1260 - 1264 vol.3
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (464 KB)

    The TSUNAMI (II) project is an investigation into the use of adaptive antenna technology. The field trial system has been developed for the purposes of investigating the feasibility of implementing such a system using a GSM-1800 base station system. The field trial system uses a digital baseband beamforming technique (DBF) which, like all DBF systems, relies on the accurate transfer of weighted si... View full abstract»

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