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Journal of Communications and Networks

Issue 3 • Date Sept. 2006

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Displaying Results 1 - 19 of 19
  • [Front cover]

    Publication Year: 2006, Page(s): c1
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  • [Front inside cover]

    Publication Year: 2006, Page(s): c2
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  • Error probability evaluation of a novel cooperative communications signaling strategy in CDMA systems

    Publication Year: 2006, Page(s):257 - 266
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (787 KB) | HTML iconHTML

    The powerful benefits of multi-antenna systems can be obtained by cooperative communications among users in multiple access environments without the need for physical arrays. This paper studies a novel cooperative signaling strategy that achieves high performance and low implementation complexity for synchronous code division multiple access (CDMA) wireless mobile networks. The validity of the pro... View full abstract»

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  • Generalized self spread-spectrum communications with turbo soft despreading and decoding

    Publication Year: 2006, Page(s):267 - 274
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (661 KB) | HTML iconHTML

    Self-spreading (SSP) is a spread spectrum technique where the spreading sequence is generated from data bits. Although SSP allows communications with low probability of interception by unintended receivers, despreading by the intended receiver is prone to error propagation. In this paper, we propose both a new transmitter and a new receiver based on SSP with the aim to a) reduce error propagation ... View full abstract»

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  • Block-ordered layered detector for MIMO-STBC using joint eigen-beamformers and ad-hoc power discrimination scheme

    Publication Year: 2006, Page(s):275 - 285
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1513 KB) | HTML iconHTML

    Suitable for multi-input multi-output (MIMO) communications, the joint beamforming space-time block coding (JBSTBC) scheme is proposed for high-speed downlink transmission. The major functionality of the scheme entails space-time block encoder and joint transmit and receive eigen-beamformer (EBF) incorporating with block-ordered layered decoder (BOLD), and its operating principle is described in t... View full abstract»

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  • Effect of people moving near short-range indoor propagation links at 2.45 GHz

    Publication Year: 2006, Page(s):286 - 289
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (989 KB) | HTML iconHTML

    Measurement results are presented for the effects of people moving near and across short-range indoor propagation links at 2.45 GHz (ISM band). Excess loss due to scattering and blockage by human bodies in the vicinity of one terminal were measured for different radio links in an office environment. Statistics on fades due to human body motion are given. Polarization coupling (depolarization) for ... View full abstract»

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  • A generalized blind adaptive multi-user detection algorithm for multipath Rayleigh fading channel employed in a MIMO system

    Publication Year: 2006, Page(s):290 - 296
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (628 KB) | HTML iconHTML

    In this paper, a generalized blind adaptive algorithm is introduced for multi-user detection of direct sequence code division multiple access (DS-CDMA) wireless communication systems. The main property of the proposed algorithm is its ability to resolve the multipath fading channel resulting in inter symbol interference (ISI) as well as multiple access interference (MAI). Other remarkable properti... View full abstract»

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  • Adaptive cross-layer packet scheduling method for multimedia services in wireless personal area networks

    Publication Year: 2006, Page(s):297 - 305
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1059 KB) | HTML iconHTML

    High-rate wireless personal area network (HR-WPAN) has been standardized by the IEEE 802.15.3 task group (TG). To support multimedia services, the IEEE 802.15.3 TG adopts a time-slotted medium access control (MAC) protocol controlled by a central device. In the time division multiple access (TDMA)-based wireless packet networks, the packet scheduling algorithm plays a key role in quality of servic... View full abstract»

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  • Performance analysis of space-time block coded cooperative wireless transmission in Rayleigh fading channels

    Publication Year: 2006, Page(s):306 - 312
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (802 KB) | HTML iconHTML

    This paper studies theoretically the bit error rate (BER) performance of cooperative transmission using space-time block code (STBC) in a fully distributed manner. Specifically, we first propose a STBC-based cooperative signaling structure to make the cooperation of three single-antenna terminals possible. Then, we derive the closed-form BER expressions for both cooperation and noncooperation sche... View full abstract»

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  • Power control in uplink and downlink CDMA systems with multiple flow types

    Publication Year: 2006, Page(s):313 - 322
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (687 KB) | HTML iconHTML

    We consider a power controlled code division multiple access (CDMA) system with multiple flow types. At each of the N nodes, there are F flow types with different signal-to-interference-and-noise-ratio (SINR) requirements. To keep the complexity of the transmitter low, we assume that each node uses the same power level for all its flows. The single flow case has been fully solved and is well-under... View full abstract»

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  • A performance analysis of OFDM systems in excessively dispersive multipath channels

    Publication Year: 2006, Page(s):323 - 329
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (779 KB) | HTML iconHTML

    For orthogonal frequency division multiplexing (OFDM), the discrete Fourier transform (DFT)-based processing at the receiver has been perceived equivalent to the matched filter (MF)-based processing. In this paper, we revisit the equivalence and mathematically show that when the guard interval is insufficient, the well-known DFT-based processing inherently causes more intersymbol and interchannel ... View full abstract»

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  • Reducing outgoing traffic of proxy cache by using client-cluster

    Publication Year: 2006, Page(s):330 - 338
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (917 KB) | HTML iconHTML

    Many web cache systems and policies concerning them have been proposed. These studies, however, consider large objects less useful than small objects in terms of performance, and evict them as soon as possible. Even if this approach increases the hit rate, the byte hit rate decreases and the connections occurring over congested links to outside networks waste more bandwidth in obtaining large obje... View full abstract»

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  • Jellyfish: A conceptual model for the as Internet topology

    Publication Year: 2006, Page(s):339 - 350
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1255 KB) | HTML iconHTML

    Several novel concepts and tools have revolutionized our understanding of the Internet topology. Most of the existing efforts attempt to develop accurate analytical models. In this paper, our goal is to develop an effective conceptual model: A model that can be easily drawn by hand, while at the same time, it captures significant macroscopic properties. We build the foundation for our model with t... View full abstract»

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  • Gallop-Vegas: An enhanced slow-start mechanism for TCP Vegas

    Publication Year: 2006, Page(s):351 - 359
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1003 KB) | HTML iconHTML

    In this article, we present a new slow-start variant, which improves the throughput of transmission control protocol (TCP) Vegas. We call this new mechanism Gallop-Vegas because it quickly ramps up to the available bandwidth and reduces the burstiness during the slow-start phase. TCP is known to send bursts of packets during its slow-start phase due to the fast window increase and the ACK-clock ba... View full abstract»

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  • Call for papers

    Publication Year: 2006, Page(s): 1
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  • Call for papers

    Publication Year: 2006, Page(s): 1
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  • [Advertisement]

    Publication Year: 2006, Page(s): 1
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  • Journal of Communications and Networks (JCN)

    Publication Year: 2006, Page(s): c3
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  • [Back cover]

    Publication Year: 2006, Page(s): c4
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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.

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Anthony Ephremides
University of Maryland