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2005 2nd International Symposium on Wireless Communication Systems

Date 5-7 Sept. 2005

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Displaying Results 1 - 25 of 210
  • [Cover]

    Publication Year: 2005, Page(s): C1
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  • [Title page]

    Publication Year: 2005, Page(s): i
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  • Copyright page

    Publication Year: 2005, Page(s): ii
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  • Conference committee

    Publication Year: 2005, Page(s): iii
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  • Messages

    Publication Year: 2005, Page(s): iv
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  • Program message

    Publication Year: 2005, Page(s): v
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  • Conference committee

    Publication Year: 2005, Page(s): vi
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  • Conference committee

    Publication Year: 2005, Page(s): vii
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  • Program message

    Publication Year: 2005, Page(s): viii
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  • Conference committee

    Publication Year: 2005, Page(s): ix
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  • Table of contents

    Publication Year: 2005, Page(s):xi - xxv
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  • [Breaker page]

    Publication Year: 2005, Page(s): 1
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  • Achievable Rate Region of Multiple Access with Linearly Precoded Parallel Block-Fading MIMO Channels

    Publication Year: 2005, Page(s):3 - 7
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4394 KB) | HTML iconHTML

    The goal is to derive achievable rate region of multiple access MIMO channel with finite number of flat-fading parallel observations when novel user-wise independent linear precoding (pre-equalizing) is performed as the second level encoding procedure for each user separately. No channel state information is assumed to be known at transmitters and each user wants to communicate at the maximum but ... View full abstract»

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  • A Threshold-Based Adaptive Encoding for Achieving the Diversity-Multiplexing Tradeoff

    Publication Year: 2005, Page(s):8 - 12
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (970 KB) | HTML iconHTML

    Recent work has established the diversity-multiplexing tradeoff at high SNR in multiple input multiple output (MIMO) communication systems having Nt and Nr transmit and receive antennas respectively. We introduce a new adaptive encoding (AE) scheme which can switch efficiently between suboptimal encoding schemes, given a very limited non-systematic feedback information to the... View full abstract»

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  • Capacity of Suboptimal Decoders for Coded Multiple-Input Multiple-Output Systems

    Publication Year: 2005, Page(s):13 - 17
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (863 KB) | HTML iconHTML

    The optimal detector for coded multiple antenna systems is too complex to be implemented. We thus consider number of decouplers: the linear zero-forcing equalizer, the linear minimum mean-squared error equalizer (LMMSE), the successive soft/hard interference canceller, and the parallel soft/hard interference canceller. The constrained capacities of these decouplers are analyzed. It is shown that t... View full abstract»

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  • Performance Evaluation of the V-BLAST Coset Detector

    Publication Year: 2005, Page(s):18 - 21
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (868 KB) | HTML iconHTML

    In this paper we address the analytical performance evaluation of the V-BLAST coset detector (CD). The V-BLAST-CD is a sub-optimal detector for spatial multiplexing MIMO systems using non-binary constellations. In the V-BLAST-CD the decision on the transmitted vector is taken by applying the maximum likelihood detector on a list of candidate vectors containing only a subset of the possible transmi... View full abstract»

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  • Joint Estimation of Channel Parameters for MIMO Communication Systems

    Publication Year: 2005, Page(s):22 - 26
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1381 KB) | HTML iconHTML

    In the next generation mobile communication systems, high data rates and high capacity are expected if multiple antennas are used at both receive and transmit sides. Such a radio propagation channel constitutes a multiple-input multiple-output (MIMO) system. In a wireless MIMO system, it is possible to estimate channel parameters in a multipath environment by extending the classical parameter esti... View full abstract»

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  • Minimum Symbol Error Rate Transmitter and Receiver FIR MIMO Filters for Multilevel PSK Signaling

    Publication Year: 2005, Page(s):27 - 31
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1766 KB) | HTML iconHTML

    A theory is developed for minimizing the exact symbol error rate (SER) between the desired and decoded signals with respect to the coefficients of the transmitter and receiver finite impulse response (FIR) multiple-input multiple-output (MIMO) filters. The original source signal is assumed to be a vector source with equally likely independent identically distributed multilevel phase-shift keying (... View full abstract»

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  • Comparison of Coherent and Non-Coherent Space Time Schemes for Frequency Selective Fast-Varying Channels

    Publication Year: 2005, Page(s):32 - 36
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (851 KB) | HTML iconHTML

    This paper presents a comparison between coherent and non-coherent multi-antenna systems for frequency and time selective channel. Performance of a coherent system mainly depends on channel estimation at the receiver. This estimation generally involves insertion of pilot symbols in a frame and thus a loss of spectral efficiency. Differential space time modulation (DSTM), which is an extension of S... View full abstract»

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  • [Breaker page]

    Publication Year: 2005, Page(s): 37
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  • On the Impact of Multi-mode Terminals in Heterogeneous Wireless Access Networks

    Publication Year: 2005, Page(s):39 - 43
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1003 KB) | HTML iconHTML

    Beyond 3G (B3G) networks encompasses, among other features, a wide range of radio access technologies (RATs) providing users with a flexible and efficient access to the increasing pool of demanding services. This allows users to get connected using the access technology that is most suitable according to some specified criteria. Consequently, to take full advantage of B3G networks, mobile terminal... View full abstract»

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  • Performance Study on the Effects of Cell-Breathing in WCDMA

    Publication Year: 2005, Page(s):44 - 49
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4372 KB) | HTML iconHTML

    The performance of CDMA cellular systems over the air is generally interference-limited. A phenomena arising from this is the effect of cell-breathing in 3G cellular systems. Cell-breathing is the expansion or contraction of the effective coverage of a cell in response to the number of active mobiles (MSs) in a network. If it is not well controlled, communication failure may result. With 3G offeri... View full abstract»

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  • Cell Reselection Parameter Optimization in UMTS

    Publication Year: 2005, Page(s):50 - 53
    Cited by:  Papers (4)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1239 KB) | HTML iconHTML

    With UMTS deployments well underway, one of the key performance metrics is standby time. In idle mode, standby time depends on the cell reselection mechanism. Operators can adjust stand-by time and camping cell quality performance by optimizing operator-configurable cell reselection parameters to, for instance, differentiate their service from others. In this paper, the impact of these parameters ... View full abstract»

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  • Statistical Properties of Fading Processes in WCDMA Systems

    Publication Year: 2005, Page(s):54 - 58
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (876 KB) | HTML iconHTML

    When simulating radio access networks (RANs) on the network level, the representation of the physical layer is on the MAC-layer can have a significant impact on the system performance. This paper focuses on the distribution of frame errors in WCDMA systems. We first study the statistical properties of the frame-error distribution as obtained by physical layer simulation. We then compare the statis... View full abstract»

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  • Performance Analysis of a Type-II Hybrid-ARQ in a TDMA System with Correlated Arrival over a Non-Stationary Channel

    Publication Year: 2005, Page(s):59 - 63
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (821 KB) | HTML iconHTML

    In this work, queueing performance of a type-II hybrid ARQ (automatic repeat request) scheme in a TDMA/TDD system with Markovian source over a non-stationary channel is analyzed by assuming infinite queue size. The system of interest can be described by an embedded Markov chain of M/G/1 type which can be solved by matrix analytic method of M/G/1 type. In the numerical examples, power and coding ga... View full abstract»

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