[1992 Proceedings] The Third IEEE International Symposium on Personal, Indoor and Mobile Radio Communications

19-21 Oct. 1992

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  • Proceedings of 2nd International Symposium on Personal, Indoor and Mobile Radio Communications

    Publication Year: 1992
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    Freely Available from IEEE
  • An integrated baseband processor for universal personal communications applications

    Publication Year: 1992, Page(s):32 - 35
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (216 KB)

    A fully integrated baseband processor suitable for wireless personal communications is presented. The universal architecture of the integrated circuit is demonstrated by using it to create baseband modulation signals that are Gaussian and Nyquist filtered. These baseband drive signals are created to meet present worldwide standards in cellular and cordless telephony including Digital European Cord... View full abstract»

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  • The CDMA digital cellular system-an ASIC overview

    Publication Year: 1992, Page(s):36 - 41
    Cited by:  Papers (3)  |  Patents (31)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (524 KB)

    A code division multiple access (CDMA) standard has been proposed to compete for the next generation of digital cellular telecommunications. The paper describes the CDMA system, gives an overview of some of the basic principles of the system, and how that system has been partitioned into custom ASICs View full abstract»

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  • A fully-integrated, digital, direct sequence, spread spectrum modem ASIC

    Publication Year: 1992, Page(s):42 - 46
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (296 KB)

    Spread spectrum modulation has become very popular due to the FCC allocations in three ISM bands, e.g. 902-928 MHz. The paper describes a single ASIC which digitally implements the down conversion, matched filter, DPSK detection, and AFC functions of a demodulator as well as the differential encoding, PN spreading, and PSK modulation functions of a transmitter. This ASIC performs virtually all the... View full abstract»

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  • Performance of a multiple access protocol for an ATM based pico-cellular radio LAN

    Publication Year: 1992, Page(s):139 - 144
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (496 KB)

    In recent years considerable interest has been shown in the development of packet-based in-building radio LANs. Most of these networks use more than one frequency together with slot reservation strategies to handle mobile traffic in a radio environment. This paper proposes an architecture and a related media access protocol, using a single frequency, to support ATM (asynchronous transfer mode) tra... View full abstract»

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  • Rapid acquisition of spread spectrum signals utilizing integrated technologies

    Publication Year: 1992, Page(s):47 - 51
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB)

    A relatively new rapid coarse acquisition technique is proposed as an alternative to the conventional models currently used in direct sequence spread spectrum (DS-SS) systems. It's comprised of digital components that conform readily to integrated technologies. When nested in a Costas phase locked loop (Costas PLL) the unit generates a pseudo-noise (PN) sequence that is in phase with the incoming ... View full abstract»

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  • A proposed access method for the wireless LAN standard

    Publication Year: 1992, Page(s):145 - 148
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (208 KB)

    The attempt by the IEEE802.11 wireless LAN standard to fulfil the user anticipated performance expectations has imposed a challenging demand on its access method selection. To utilize the valuable shared spectrum resources effectively, a demand assigned multiple access method is proposed to meet this goal. The method is tailored to suit the key requirement specifications which are at present being... View full abstract»

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  • A complex adaptive equalizer ASIC

    Publication Year: 1992, Page(s):52 - 58
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (352 KB)

    An adaptive equalizer ASIC has been developed with a structure which implements either the FIR filter function or the adaptive weight generator function. The ASIC contains full complex arithmetic, saturation logic, tap leakage logic, complex conjugation, and selectable adaptation loop gain, and is cascadable without external logic. It contains 4 taps, cascadable to 8 T-spaced or 16 T/2-spaced taps... View full abstract»

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  • A framework for specifying a physical layer and medium for wireless local area networks

    Publication Year: 1992, Page(s):149 - 152
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (404 KB)

    A conceptual framework for specifying a physical layer and a medium for a wireless local area network is detailed. This framework defines a physical layer entity consisting of a medium independent sublayer, a physical convergence sublayer and a medium dependent sublayer. The action of this physical layer entity is to provide a bidirectional mapping between the information present at the media acce... View full abstract»

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  • Implementation of a simple delay-multiply-average technique for frequency estimation on a fixed point DSP

    Publication Year: 1992, Page(s):59 - 63
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (332 KB)

    Describes the implementation of an efficient algorithm for frequency estimation. The algorithm uses a bank of simple delay-multiply-average operations with an increasing delay in each branch. The branch outputs are combined to obtain the frequency estimate. This approach is capable of performance that is close to the Cramer-Rao lower bound. The implementation on a fixed point DSP is described for ... View full abstract»

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  • Resource management for mobility support in a third generation mobile system

    Publication Year: 1992, Page(s):10 - 16
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (428 KB)

    The efficient control and management of radio and fixed network resources in third generation mobile systems will be of vital importance in the provision of mobility to the mass market by the turn of the century. The paper examines the issues surrounding radio and fixed network resource management and the implications to mobility provision View full abstract»

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  • Overview of EIA/TIA IS-41 [cellular radio standard]

    Publication Year: 1992, Page(s):220 - 224
    Cited by:  Papers (1)  |  Patents (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (436 KB)

    This paper provides an overview of the North American Mobile Application Part (MAP), which is documented in Electronic Industries Association (EIA)/Telecommunications Industry Association (TIA) Interim Standards (IS)-41. The purpose of the IS-41 series of recommendations is to address the ongoing and developing concerns of the Cellular Radio-telecommunications Industry with regard to useful servic... View full abstract»

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  • A spectrally efficient narrowband mobile radio system for voice and data communication

    Publication Year: 1992, Page(s):525 - 533
    Cited by:  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (768 KB)

    Private land mobile communications has experienced significant demand for increased capacity and for new services, but congestion within the currently allocated 450 and 800 MHz bands has severely limited the capability of present-generation systems to meet this demand. This paper proposes a narrowband integrated voice/data mobile radio system which triples current voice traffic capacity and simult... View full abstract»

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  • MSKRC quadrature-overlapped modulation and its performance analysis

    Publication Year: 1992, Page(s):605 - 609
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (268 KB)

    A bandwidth efficient quadrature-overlapped modulation, MSK raised cosine (MSKRC) modulation, is introduced. Its power spectral density (PSD) is the product of PSDs of MSK and quadrature overlapping raised cosine (QORC) signals. The PSD main lobe of the MSKRC signal is the same as that of the MSK signal but the PSD sidelobes of the MSKRC signal diminish approximately as fast as 1/f10, m... View full abstract»

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  • Motivation for centralized wireless LAN functions

    Publication Year: 1992, Page(s):153 - 158
    Cited by:  Papers (1)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (504 KB)

    There are technical, economic and human tradeoff factors in determining the degree to which system functions (including medium access method) are distributed between stations and common equipment in large scale wireless LAN systems. Motivations, specific use and benefits of particular centralized functions are described in the context of the application and service requirements of IEEE P802.11. It... View full abstract»

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  • Fading characteristics in outdoor microcell at 1700 MHz

    Publication Year: 1992, Page(s):88 - 91
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (260 KB)

    Narrowband measurements at 1700 MHz have been performed in two different urban environments with antennas below roof level. From these data fading characteristics have been extracted and analysed. For the long fading, period below 5 λ, variance and correlation (autocorrelation) have been calculated and analysed concerning differences between line-of-sight and non-line-of-sight with the tran... View full abstract»

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  • A fast algorithm for maximum likelihood detection of QPSK or π/4-QPSK sequences with unknown phase

    Publication Year: 1992, Page(s):240 - 244
    Cited by:  Papers (7)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (280 KB)

    Maximum likelihood sequence detection (MLSD) of differentially encoded MPSK uses a joint decision on N symbols to achieve a performance gain over conventional 2 symbol differential detection. This paper gives a fast (optimum) algorithm to implement MLSD; the number of operations per N symbol block is of order N log2 N. Thus, it is practical to implement MLSD for any reasonable N for mod... View full abstract»

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  • Physical modelling of macro, micro and inhouse cell mobile radio channels

    Publication Year: 1992, Page(s):64 - 68
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (448 KB)

    Realistic channel models are prerequisites for system design and performance analysis of new indoor, personal, and mobile radio communications systems. Channel models should rely on the physical understanding of the radio wave propagation process which has to be developed from both theory and measurements. This allows a description of the essential characteristics pertinent for communication syste... View full abstract»

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  • Throughput optimization of reservation protocols for high speed networks

    Publication Year: 1992, Page(s):287 - 291
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (256 KB)

    Throughput calculation of reservation protocols, normally, ignores the existence of guard time between packets from different users. It should be, however, taken into considerations when propagation delay becomes significant in some applications. In this paper, a Near Station Send First (NSSF) scheme is described. The transmission guard time overhead can be less than 1% of the channel capacity in ... View full abstract»

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  • UMTS: a third generation mobile system

    Publication Year: 1992, Page(s):17 - 21
    Cited by:  Papers (2)  |  Patents (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (412 KB)

    UMTS (Universal Mobile Telecommunications System) is a system capable of providing a variety of mobile services (up to 2 Mbps) now being offered by (dedicated) paging, cordless, and cellular communications systems separately. UMTS is to be operational in domestic, business, vehicular, and (multi-operator) public environments. Maximum integration with the IBCN (Integrated Broadband Communications N... View full abstract»

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  • On multiuser detection in asynchronous CDMA flat Rayleigh fading channels

    Publication Year: 1992, Page(s):123 - 127
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (320 KB)

    The performance analysis of low-complexity decorrelating detectors is presented for both coherent and differentially coherent transmission over the multiple-access, frequency-nonselective Rayleigh fading channel. While it is known that correlation-type receivers are near-far limited in the case when a single fading path dominates, it is shown that the multiuser detectors eliminate the bit error ra... View full abstract»

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  • Reed-Solomon coded QAM modulation on a Rayleigh fading channel

    Publication Year: 1992, Page(s):591 - 595
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB)

    The authors propose the design of a coded transmission system for the terrestrial urban radio channel, with a 4 bit-spectral efficiency. They evaluated the performances of a Reed-Solomon coded 64-QAM modulation on a Rayleigh fading channel. Three decoding algorithms are considered: a hard decision and an erasure Berlekamp-Massey decoding algorithm and a soft decision maximum likelihood decoding al... View full abstract»

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  • Optimizing call management of mobile units

    Publication Year: 1992, Page(s):225 - 229
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (144 KB)

    This paper examines the problem of dynamically maintaining the connection between a source and destination unit. The task of maintaining service semantics in the face of mobility can be handled by a combination of two mechanisms: Reset, and Forward. Resetting involves modifying the path between the source and the destination units. Forwarding, on the other hand, involves forwarding a call through ... View full abstract»

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  • The Mobitex packet-switched radio data system

    Publication Year: 1992, Page(s):534 - 538
    Cited by:  Papers (7)  |  Patents (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (428 KB)

    This paper is a systems engineering overview of a state-of-art packet switched radio data system-the Mobitex system. RAM Mobile Data operates Mobitex systems in the US and the UK. Mobitex systems are also in operation in Scandinavia and Canada. The system architecture is `open', which allows any company to enter the wireless data business by providing radio modems and/or application software confo... View full abstract»

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  • The capacity region for the Gaussian channel with random multipath

    Publication Year: 1992, Page(s):483 - 487
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB)

    In order to provide the decoder with essential information on the channel state, and improve the effectiveness of the communication, a probabilistic analysis of the communication channel is needed. Such modeling must include fading and multipath, as well as interference. An insight into the behavior of the channel can be gained by attempting an information theoretical approach for the multipath mo... View full abstract»

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