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Journal of Communications and Networks

Issue 2 • Date June 2003

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Displaying Results 1 - 18 of 18
  • MIMO capacity, level crossing rates and fades: The impact of spatial/temporal channel correlation

    Publication Year: 2003, Page(s):104 - 115
    Cited by:  Papers (35)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (950 KB) | HTML iconHTML

    It is well known that Multiple Input Multiple Output (MIMO) systems offer the promise of achieving very high spectrum efficiencies (many tens of bit/s/Hz) in a mobile environment. The gains in MIMO capacity are sensitive to the presence of spatial and temporal correlation introduced by the radio environment. In this paper, we examine how MIMO capacity is influenced by a number of factors e.g., a) ... View full abstract»

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  • Approaching near-capacity on a multi-antenna channel using successive decoding and interference cancellation receivers

    Publication Year: 2003, Page(s):116 - 123
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (438 KB) | HTML iconHTML

    In this paper, we address the problem of designing multirate codes for a multiple-input and multiple-output (MIMO) system by restricting the receiver to be a successive decoding and interference cancellation type, when each of the antennas is encoded independently. Furthermore, it is assumed that the receiver knows the instantaneous fading channel states but the transmitter does not have access to... View full abstract»

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  • Noncoherent detection of orthogonal modulation combined with Alamouti space-time coding

    Publication Year: 2003, Page(s):124 - 134
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (454 KB) | HTML iconHTML

    In this paper, we investigate the error probability performance of noncoherently detected orthogonal modulation combined with Alamouti space-time block coding. We find that there are two types of pairwise error probabilities that characterize the performance. We employ methods that allow a direct evaluation of exact, closed-form expressions for these error probabilities. Theoretical as well as num... View full abstract»

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  • Error performance of serially concatenated space-time coding

    Publication Year: 2003, Page(s):135 - 140
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (511 KB) | HTML iconHTML

    In this paper, we investigate the error performance of a serially concatenated system using a nonrecursive convolutional code as the outer code and a recursive QPSK space-time trellis code as the inner code on quasi-static and rapid Rayleigh fading channels. At the receiver, we consider iterative decoding based on the maximum a posteriori (MAP) algorithm. The performance is evaluated by means of c... View full abstract»

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  • Design criteria and performance of space-frequency bit-interleaved coded modulations in frequency-selective Rayleigh fading channels

    Publication Year: 2003, Page(s):141 - 149
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (428 KB) | HTML iconHTML

    In this paper, we investigate design criteria and the performance of the space-frequency bit-interleaved coded modulation (SF-BICM) systems in frequency-selective Rayleigh fading channels. To determine the key parameters that affect the performance of SF-BICM, we derive the pairwise error probability (PEP) in terms of the determinant of the matrix corresponding to any two codewords. We prove that ... View full abstract»

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  • Performance of multicarrier-CDMA uplink with antenna arrays and multiuser detection

    Publication Year: 2003, Page(s):150 - 156
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (352 KB) | HTML iconHTML

    In this paper, an uplink MC-CDMA system incorporating multiuser detection and smart antennas has been considered. The performance of asynchronous as well as synchronous system is studied over a correlated Rayleigh multipath slow fading channel. A simplified array-processing algorithm suitable for slow fading situation is investigated to overcome the heavy computational complexity associated with E... View full abstract»

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  • Iterative LBG clustering for SIMO channel identification

    Publication Year: 2003, Page(s):157 - 166
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (562 KB) | HTML iconHTML

    This paper deals with the problem of channel identification for Single Input Multiple Output (SIMO) slow fading channels using clustering algorithms. Due to the intrinsic memory of the discrete-time model of the channel, over short observation periods, the received data vectors of the SIMO model are spread in clusters because of the AWGN noise. Each cluster is practically centered around the ideal... View full abstract»

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  • Receiver techniques for ultra-wide-band multiuser systems over fading multipath channels

    Publication Year: 2003, Page(s):167 - 173
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (382 KB) | HTML iconHTML

    We treat the problem of channel estimation and interference cancellation in multiuser ultra-wide-band (UWB) communication systems over multipath fading channels. The UWB system under consideration employs a random time-hopping impulse radio format. We develop a channel estimation method based on linear weighted algorithm. An iterative channel estimation and interference cancellation scheme is prop... View full abstract»

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  • Design and performance of space-time trellis codes for rapid Rayleigh fading channels

    Publication Year: 2003, Page(s):174 - 183
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (511 KB) | HTML iconHTML

    Space-Time (ST) codes are known to provide high transmission rates, diversity and coding gains. In this paper, a tight upper bound on the error probability of ST codes over rapid fading channels is presented. Moreover, ST codes suitable for rapid fading channels are presented. These codes are designed using the QPSK and 16-QAM signal constellations. The proposed codes are based on two different en... View full abstract»

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  • Large-system analyses of multiple-antenna system capacities

    Publication Year: 2003, Page(s):96 - 103
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (612 KB) | HTML iconHTML

    Asymptotic theorems are very commonly used in probability. For systems whose performance depends on a set of n random parameters, asymptotic analyses for n → ∞ are often used to simplify calculations and obtain results yielding useful hints at the behavior of the system for finite n. These asymptotic analyses are especially useful whenever the convergence to the asymptotic results is... View full abstract»

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  • [Advertisement]

    Publication Year: 2003, Page(s): 1
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  • Call for papers

    Publication Year: 2003, Page(s): 1
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  • Call for papers

    Publication Year: 2003, Page(s): 1
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  • [Front cover]

    Publication Year: 2003, Page(s): c1
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  • [Back cover]

    Publication Year: 2003, Page(s): c4
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  • Special issue on coding and signal processing for MIMO system

    Publication Year: 2003, Page(s):93 - 95
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (96 KB)

    Projections indicate that by the year 2005 the number of wireless subscribers will exceed that of wireline subscribers, a fact that promises both an explosive growth in wireless services as well as a rapid convergence with the Internet. The wireless challenges are varied and many: multimedia traffic requiring high data rates, networking requiring seamless connectivity, mobility causing the physica... View full abstract»

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  • Journal of Communications and Networks (JCN) - back inside cover

    Publication Year: 2003, Page(s): c3
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  • Journal of Communications and Networks (JCN) - back inside cover

    Publication Year: 2003, Page(s): c2
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Aims & Scope

The Journal of Communications and Networks is published six times per year, and is committed to publishing high-quality papers that advance the state-of-the-art and practical applications of communications and information networks.

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Meet Our Editors

Editor-in-Chief
Anthony Ephremides
University of Maryland