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Universal Personal Communications. 1995. Record., 1995 Fourth IEEE International Conference on

Date 6-10 Nov. 1995

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Displaying Results 1 - 25 of 203
  • Proceedings of ICUPC '95 - 4th IEEE International Conference on Universal Personal Communications

    Publication Year: 1995
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    Freely Available from IEEE
  • Conference Author Index

    Publication Year: 1995
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    Freely Available from IEEE
  • Reduced complexity frequency estimator applied to burst transmission

    Publication Year: 1995 , Page(s): 231 - 235
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (429 KB)  

    In burst transmission, carrier recovery is a crucial point for synchronization systems. Indeed, an imprecise frequency estimation can cause cycle slips. An unbiased feedforward frequency estimator, for M-PSK modulated signals, in the non data aided mode (NDA) is derived from the maximum likelihood (ML) principle. A compromise is realized between noise filtering and estimation slip probability by m... View full abstract»

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  • Improved error resilience in mobile audio-visual communications

    Publication Year: 1995 , Page(s): 702 - 706
    Cited by:  Papers (4)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (674 KB)  

    Low bit rate audio-visual coding algorithms are now being actively standardized in ITU and ISO/IEC. Their application to mobile multi-media communication systems is being considered. One of the most important features in this application is robustness against the transmission errors experienced in mobile radio channels. In this paper, the speech and video quality degradations due to errors are ana... View full abstract»

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  • Alternative scenarios for data applications via Internet-mobile and DECT-ATM interworking

    Publication Year: 1995 , Page(s): 788 - 792
    Cited by:  Patents (17)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (540 KB)  

    The standardization of DECT in ETSI has been very productive, as a matter of fact the DECT standard was one of the first to be completed with different profiles. DECT Data profile gives the possibility to interconnect a wireless access to any possible data network. This paper deals with an interworking solution to access the Internet through the DECT air interface, using ATM as transport network. ... View full abstract»

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  • Co-channel interference cancellation for CDMA over multipath fading channels

    Publication Year: 1995 , Page(s): 143 - 147
    Cited by:  Papers (3)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (372 KB)  

    We consider the performance of direct-sequence (DS) based code division multiple-access (CDMA) over a wireless communications environment that is characterized by multipath Rayleigh fading channels. Specifically, we propose and analyze a multiuser detection strategy, which employs a cascade of co-channel interference cancellation, for the demodulation of asynchronous DS spread-spectrum multiple-ac... View full abstract»

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  • Satellite personal communications: integration scenarios with terrestrial networks

    Publication Year: 1995 , Page(s): 585 - 589
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (504 KB)  

    The paper considers future possible scenarios integrating satellite systems with cellular networks. In particular, original satellite counterparts of the cell and the location area concepts are determined. As a matter of fact, as it is shown in the paper, an appropriate definition of these concepts is a fundamental step for the design of efficient handover and location update procedures in an inte... View full abstract»

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  • Standardization, frequency spectrum and regulatory issues for satellite personal communications

    Publication Year: 1995 , Page(s): 575 - 579
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (576 KB)  

    The paper discusses some issues relevant to satellite personal communication networks (S-PCN), showing that substantial international cooperation is required to exploit the huge potential for global market penetration. One of the most crucial issues for the deployment of S-PCN (LEO) systems is represented by the frequency coordination/service licensing. Their “global” nature needs inte... View full abstract»

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  • BER performance of orthogonalizing matched filter (OMF) in mobile DS-CDMA systems

    Publication Year: 1995 , Page(s): 42 - 46
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (388 KB)  

    This paper proposes orthogonalizing matched filter (OMF) detection with RAKE and antenna diversity reception for mobile DS-CDMA systems. OMF is a blind interference canceller controlling its coefficients adaptively by minimizing the average output power under a constraint coefficient condition. The OMF scheme with RAKE reception includes matched filters which are orthogonal to the desired signal m... View full abstract»

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  • Performance of ARQ go-back-N protocol in Markov channels with unreliable feedback: delay analysis

    Publication Year: 1995 , Page(s): 481 - 485
    Cited by:  Papers (6)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (552 KB)  

    An ARQ go-back-N protocol with a time-out mechanism is studied. Transmissions on both the forward and the reverse channels are assumed to be subject to Markovian errors. An approach based on renewal theory is further extended and the steady state number of packets in the ARQ system is evaluated. This quantity is one of two components that contribute to the delay in the overall system. Simulation r... View full abstract»

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  • Pre-diversity using coding, multi-carriers and multi-antennas

    Publication Year: 1995 , Page(s): 605 - 609
    Cited by:  Papers (3)  |  Patents (8)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (376 KB)  

    In this paper, we describe a prediversity (diversity at transmitter) scheme using coding, multi-carriers and multi-antennas designed for fading channels. Burst errors occur frequently in the Rayleigh flat fading mobile channel. To solve this kind of problem, the time interleaving technique has been utilized. However it can not deal with slow fadings, and has a long processing delay. Our proposal r... View full abstract»

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  • A study on mobile multi-media terminal construction for PHS

    Publication Year: 1995 , Page(s): 677 - 681
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (364 KB)  

    This paper proposes a new mobile multi-media terminal architecture for personal handyphone system (PHS) to permit the use of portable computer devices. The features of the architecture are as follows. First, the communication control function is put into the terminals to make it possible to correct transmission error adaptively according to the data type. Second, high levels of modularity are offe... View full abstract»

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  • A study of CW spatial fading of the indoor radio propagation channel

    Publication Year: 1995 , Page(s): 201 - 205
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (420 KB)  

    Results of the analysis of 160 segments of 1.5 meter CW envelope fading data are reported. The data were obtained by complex addition of the multipath components of the channel's impulse responses. Measurements were performed at two dissimilar office buildings, using four antenna separations of 5, 10, 20, and 30 meters per building, and 20 locations (1.5 meters in extent) for each antenna separati... View full abstract»

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  • A comparison on the performance of the FDD and TDD modes of B-CDMA communications

    Publication Year: 1995 , Page(s): 339 - 343
    Cited by:  Papers (3)  |  Patents (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (432 KB)  

    The performance of two modes of transmission power control of the broadband code division multiple access (B-CDMA) signals, the time division duplex (TDD) and frequency division duplex (FDD), on a modified Rayleigh modeled channel; and their respective effectivity of diversity reception are compared in order to find the most efficient method to be adopted for the future personal land mobile teleco... View full abstract»

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  • Mobility management signalling in satellite mobile networks

    Publication Year: 1995 , Page(s): 580 - 584
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (428 KB)  

    The implications of some location techniques when applied to satellite mobile networks are examined. Several types of location techniques are possible, but all of them have different implications in the mobility management procedures. A trade-off between paging and location registration signalling is always present. The database contents might be different according to the applied location techniq... View full abstract»

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  • Performance evaluation of parallel acquisition in cellular DS/CDMA reverse link

    Publication Year: 1995 , Page(s): 47 - 51
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (328 KB)  

    This paper evaluates the acquisition probability and mean acquisition time of the double-dwell and single-dwell detection schemes for the parallel acquisition system, in the IS-95 reverse link. The parallel acquisition is performed by N parallel I/Q noncoherent correlators. The detection, false alarm, and missing probabilities for the single-dwell and double-dwell detection schemes are evaluated o... View full abstract»

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  • Performance modelling of UPT networks

    Publication Year: 1995 , Page(s): 543 - 547
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (392 KB)  

    A general modelling framework for steady state performance analysis of Universal Personal Telecommunications (UPT) services in a multinetwork environment is presented in this paper. The investigated performance measures are related to service control points (SCPs) and databases. The proposed framework enables the modelling of UPT services described in the ITU Draft Rec. Q.76. This framework consid... View full abstract»

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  • High-speed multi-modulus prescaler IC

    Publication Year: 1995 , Page(s): 325 - 328
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (308 KB)  

    This paper presents a high-speed multi-modulus prescaler IC which consists of nine stages of dual-modulus prescaler (+2/+3) connected in cascade. The multi-modulus prescaler divides the input clock frequency by an integer between 512 to 1024 with a unit step increment. Two kinds of prescaler ICs have been developed: one operates up to 1.2 GHz with a dissipation of 10.8 mW at 2.7 V, and the other o... View full abstract»

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  • Performance of integrated macro and microcell systems applied to TDMA or CDMA cellular systems

    Publication Year: 1995 , Page(s): 615 - 619
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (416 KB)  

    Integration of macro and microcell seems to be a relevant method in the next generation of cellular systems, where higher traffic must be accommodated with a minimum effort of investment. In this paper, we theoretically analyze the system from viewpoint of capacity and probability that a required carrier to interference signal power ratio (CIR) can be maintained in both macrocell and microcell. TD... View full abstract»

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  • A representative based architecture for handling mobility in connection oriented radio networks

    Publication Year: 1995 , Page(s): 848 - 852
    Cited by:  Papers (7)  |  Patents (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (556 KB)  

    This paper presents a connection management architecture for handling mobility in a radio network environment. A new concept of per roaming entity software agent, known as mobile representative, is used for insulating fired network entities from the effects of user mobility. It is shown that mobile representatives can, be used for distributing mobility management load within fixed backbone network... View full abstract»

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  • Architectures for PCS mobility management on ATM transport networks

    Publication Year: 1995 , Page(s): 763 - 768
    Cited by:  Papers (24)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (512 KB)  

    In the future, it is expected that PCS will capture significant revenues generated by business and the residential market. In order to provide more flexible, widespread, tetherless portable communications than can be provided by today's limited portable communications approaches, low-power exchange access radio needs to be integrated with network intelligence provided by the wireline network. We d... View full abstract»

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  • Narrow and wideband measurements for millimeter waves PCS channel characterization

    Publication Year: 1995 , Page(s): 206 - 210
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (600 KB)  

    Extensive measurements have been performed within a typical concrete building laboratory for an indoor EHF multipath channel. It is intended to help in establishing design guidelines for indoor wireless communications systems using millimeter waves. It deals with measurements obtained for narrow and wideband indoor radio channels at 37 GHz. Two kinds of transmission antennas, omnidirectional and d... View full abstract»

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  • Mobile network architectures towards UMTS

    Publication Year: 1995 , Page(s): 178 - 182
    Cited by:  Patents (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (524 KB)  

    The development of the third generation mobile systems obeys, on one hand, the requirement of complete integration within the IBC framework, and is able to supply several communication features and a wide spectrum of services and, on the other hand, a transition perspective, where it can be seen as an evolution of second generation networks, namely GSM, DCS1800 and DECT. This paper addresses the U... View full abstract»

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  • A model of the handover dwell time in mobile cellular systems

    Publication Year: 1995 , Page(s): 364 - 368
    Cited by:  Papers (5)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (444 KB)  

    Handover request queueing has been proposed as protection scheme for future cellular networks and extensively analyzed. In this frame, however, the distribution of the handover dwell time-i.e. the allowed queue waiting time-has been only reasonably assumed. The paper modelizes the handover dwell time in a coverage geometry of circular cells. The satisfactory results of the modeling are compared wi... View full abstract»

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  • The estimation of a CDMA personal system with feedback power control

    Publication Year: 1995 , Page(s): 344 - 347
    Cited by:  Papers (1)  |  Patents (3)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (216 KB)  

    Code-division multiple access (CDMA) has been proposed to increase the radio capacity in the personal and mobile radio communication systems. Power control is used to solve the “near-far” problem in the reverse link and to raise the radio capacity in the forward link of a CDMA system. In general, the power control system estimate the short term average SIR. This paper shows a feedback ... View full abstract»

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