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2008 IEEE International Symposium on Wireless Communication Systems

21-24 Oct. 2008

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  • [CD label]

    Publication Year: 2008, Page(s): c1
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  • Proceedings of the 2008 IEEE international symposium on wireless communication systems

    Publication Year: 2008, Page(s): i
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  • Hub page

    Publication Year: 2008, Page(s): ii
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  • Session list

    Publication Year: 2008, Page(s):iii - iv
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  • Table of contents

    Publication Year: 2008, Page(s):v - xxxvi
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  • Brief author index

    Publication Year: 2008, Page(s):xxxvii - xlvi
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  • Detailed author index

    Publication Year: 2008, Page(s):xlvii - cxliv
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  • The end of indexes

    Publication Year: 2008, Page(s): cxlv
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  • Information for authors

    Publication Year: 2008, Page(s): cxlvi
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  • Frequently asked questions

    Publication Year: 2008, Page(s):cxlvii - cxlix
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  • [PDF Reader FAQ and support]

    Publication Year: 2008, Page(s): cl
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  • Preface

    Publication Year: 2008, Page(s): cli
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  • Committee

    Publication Year: 2008, Page(s): clii
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  • Biographies

    Publication Year: 2008, Page(s): cliii
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  • ISWCS'08 tutorials

    Publication Year: 2008, Page(s):cliv - clix
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (400 KB) | HTML iconHTML

    Provides an abstract for each of the tutorial presentations and a brief professional biography of each presenter. The complete presentations were not made available for publication as part of the conference proceedings. View full abstract»

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  • Heuristic resource allocation for sum rate optimization in MIMO-OFDM systems using eigenvalue updates

    Publication Year: 2008, Page(s):1 - 5
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (126 KB) | HTML iconHTML

    In this paper a heuristic resource allocation algorithm for sum rate maximization is presented. We consider an orthogonal frequency division multiplexing channel with multiple antennas at the base station as well as at the mobile stations. Our algorithm uses eigen-beamforming and dirty paper coding. The user interference is estimated and the eigenvalues of the affected beams are updated. Our algor... View full abstract»

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  • Multi-user cross-layer allocation design for LP-OFDM high data rate UWB systems

    Publication Year: 2008, Page(s):6 - 10
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (310 KB) | HTML iconHTML

    In this paper, we investigate a cross-layer design for the packet scheduling and the resource allocation in UWB systems. This design considers the combination of queuing and channel state information (CSI) which provides QoS support for multimedia applications in UWB. For the physical layer, the use of a linear precoded orthogonal division multiplexing (LP-OFDM) waveform is proposed because of its... View full abstract»

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  • Optimal and efficient bit loading for OFDM in the presence of channel uncertainty

    Publication Year: 2008, Page(s):11 - 15
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (129 KB) | HTML iconHTML

    In practice only imperfect channel state information (CSI) is available at the transmitter due to noisy and time-varying channel. In this paper, we consider optimal bit loading for orthogonal frequency division multiplexing (OFDM) with imperfect CSI subject to channel estimation. The frame length comes in as an important control parameter, while soft channel estimation and the Cramer-Rao bound are... View full abstract»

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  • Statistical analysis of OFDMA assignments

    Publication Year: 2008, Page(s):16 - 20
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (923 KB) | HTML iconHTML

    In this paper we investigate statistical properties of IP optimal subcarrier assignments in the down-link of an OFDMA cell. Essentially, we show that such subcarrier assignments do have ¿¿hidden¿¿ statistical properties which can be exploited to design an extremely simple assignment strategy. We investigate such statistical properties and the corresponding performance of the simple assignment rule... View full abstract»

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  • New metrics reflecting the nonlinear distortions in OFDM transmission

    Publication Year: 2008, Page(s):21 - 25
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1986 KB) | HTML iconHTML

    In this paper, the peak-to-average power ratio (PAPR) metric and other metrics reflecting nonlinear distortions caused by a nonlinear element are presented. To avoid the drawbacks and ambiguity of some well-known frequently quoted metrics an attempt to reveal the influence of nonlinear elements on the transmitted signal is made, what leads to more reliable assessment of the phenomena of the occurr... View full abstract»

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  • OFDM high speed channel complex gains estimation using Kalman filter and QR-detector

    Publication Year: 2008, Page(s):26 - 30
    Cited by:  Papers (7)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (236 KB) | HTML iconHTML

    This paper deals with the case of a high speed mobile receiver operating in an orthogonal-frequency-division-multiplexing (OFDM) communication system. Assuming the knowledge of delay-related information, we propose an iterative algorithm for joint multi-path Rayleigh channel complex gains and data recovery in fast fading environments. Each complex gain time-variation, within one OFDM symbol, is ap... View full abstract»

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  • Analytical evaluation of nonlinear distortion effects on OFDMA signals used in the downlink transmission

    Publication Year: 2008, Page(s):31 - 36
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (328 KB) | HTML iconHTML

    In this paper we consider the evaluation of nonlinear distortion effects on the downlink transmission of systems employing OFDMA (orthogonal frequency division multiple access) signals. Our results allow an analytical spectral characterization of the transmitted signals, as well as the computation of nonlinear interference levels on the received signals. It is shown that the set of subcarriers all... View full abstract»

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  • Intercarrier Interference in OFDM: A deterministic model for transmissions in mobile environments with imperfect synchronization

    Publication Year: 2008, Page(s):37 - 41
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (178 KB) | HTML iconHTML

    Intercarrier Interference (ICI) is an impairment well known to degrade performance of Orthogonal Frequency Division Multiplexing (OFDM) transmissions. It arises from carrier frequency offsets (CFO), from the Doppler spread due to channel time-variation, and, to a lesser extent, from sampling frequency offsets (SFO). The literature reports several models of ICI due to each kind of impairment. Some ... View full abstract»

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  • Mitigating CFO in OFDM systems by exploring the symbol structure

    Publication Year: 2008, Page(s):42 - 46
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (238 KB) | HTML iconHTML

    In this paper we revisit the carrier frequency offset (CFO) estimation and removal for broadband orthogonal frequency division multiplexing (OFDM) systems. We propose an algorithm that explores the time-domain (TD) properties of transmitted symbols carrying pilots and data. A careful examination of the components that constitute the TD received symbols leads to the definition of a simple, yet effe... View full abstract»

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  • Collision erasure and generalized access in MIMO cognitive ad-hoc networks

    Publication Year: 2008, Page(s):47 - 51
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (145 KB) | HTML iconHTML

    Main goal of this work is to give insight on the possible performance improvement arising in the wireless local ad-hoc access from the synergic cooperation of two emerging paradigms, multi-antenna and cognitive radios. The target is the competitive maximization of each access rate in presence of multiple-access interference (MAI) induced by the other accessing terminals. Being the radios cognitive... View full abstract»

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