2004 IEEE International Symposium on Circuits and Systems (IEEE Cat. No.04CH37512)

23-26 May 2004

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  • 2004 IEEE International Symposium on Circuits and Systems (IEEE Cat. No.04CH37512)

    Publication Year: 2004
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  • 2004 IEEE International Symposium on Circuits and Systems - Title Page

    Publication Year: 2004, Page(s): i
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  • Copyright

    Publication Year: 2004, Page(s): ii
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  • General Chair's welcome

    Publication Year: 2004, Page(s): iii
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  • Technical Program Chair's message

    Publication Year: 2004, Page(s): iv
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  • Organizing Committee

    Publication Year: 2004, Page(s): v
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  • Technical Program Committee

    Publication Year: 2004, Page(s): vi
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  • Review Committee

    Publication Year: 2004, Page(s):vii - viii
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  • Reviewers

    Publication Year: 2004, Page(s):ix - xvi
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  • Table of contents

    Publication Year: 2004, Page(s):xvii - xi
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  • [Breaker page]

    Publication Year: 2004, Page(s): xii
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  • Frequency domain blind source separation using small and large spacing sensor pairs

    Publication Year: 2004, Page(s): V
    Cited by:  Papers (8)  |  Patents (1)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (626 KB) | HTML iconHTML

    This work presents a method for solving the permutation problem of frequency domain blind source separation (BSS) when the number of source signals is large, and the potential source locations are omnidirectional. We propose a combination of small and large spacing sensor pairs with various axis directions in order to obtain proper geometrical information for solving the permutation problem. Exper... View full abstract»

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  • Gradient flow bearing estimation with blind identification of multiple signals and interference

    Publication Year: 2004, Page(s): V
    Cited by:  Papers (2)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (323 KB) | HTML iconHTML

    We present a technique for reliably estimating the 3D direction cosines of a broadband travelling wave impinging on an array of four sensors of dimensions smaller than the shortest wavelength in the source. Gradient flow converts observed mixtures of delayed source signals into instantaneous linear mixtures of their temporal derivatives through observation of spatial gradients of the field. This f... View full abstract»

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  • Nonlinear ICA solutions for convolutive mixing of PNL mixtures

    Publication Year: 2004, Page(s): V
    Cited by:  Papers (1)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (364 KB) | HTML iconHTML

    This paper introduces an ICA approach to a nonlinear convolutive BSS problem. The mixing model considered here is an evolution of the post nonlinear one: it is the convolutive mixing of PNL mixture. The main aim of this paper is to enlarge the set of blind sources separation problems that can be approached by nonlinear ICA with some stricter mixing environments than the one just widely described i... View full abstract»

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  • Blind separation with Gaussian mixture model for convolutively mixed sources

    Publication Year: 2004, Page(s): V
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (297 KB) | HTML iconHTML

    This paper proposes an online blind separation algorithm with Gaussian mixture model for convolutively mixed sources. Although similar algorithms were proposed, they were derived for independent and identically distributed (iid) sources. They may not work for sources which are not made iid by any linear filter. From the theoretical viewpoint, our algorithm also works well for the sources and searc... View full abstract»

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  • Blind estimation and equalization of time-varying channels using the interacting multiple model estimator

    Publication Year: 2004, Page(s): V
    Cited by:  Papers (3)  |  Patents (3)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (268 KB) | HTML iconHTML

    This work presents an adaptive multiple model blind equalization algorithm based on the interacting multiple model (IMM) estimator to estimate the channel and the transmitted sequence corrupted by intersymbol interference (ISI) and noise. A computationally feasible implementation based on a weighted sum of Gaussian approximation of the density functions of the data signals is introduced. The propo... View full abstract»

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  • New algorithm for blind adaptive equalization based on constant modulus criterion

    Publication Year: 2004, Page(s): V
    Cited by:  Papers (1)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (576 KB) | HTML iconHTML

    Constant modulus (CM) based algorithms for blind channel equalization is well known for their effectiveness and simplicity. Recently, new CM-based equalization algorithms with improved performance have been proposed. In this paper, a new blind adaptive CM equalization algorithm using a quasi-Newton optimization method is proposed. Simulation results are presented which demonstrate that the propose... View full abstract»

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  • Sequential blind extraction of mixed source signals with guaranteed convergence

    Publication Year: 2004, Page(s): V
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (416 KB) | HTML iconHTML

    This work presents a gradient-based method for sequential blind extraction of mixed source signals. In our approach the number of unknowns to be determined is only 2(m - 1) and there is no need for computing any matrix inversion. Our algorithm is guaranteed to converge. In addition, the convergence speed of our algorithm can be improved by adjusting a parameter. Simulation results show the operati... View full abstract»

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  • A vertical layered space-time code and its blind symbol detection

    Publication Year: 2004, Page(s): V
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (269 KB) | HTML iconHTML

    Among various space-time codec schemes, the capacity provided by V-BLAST is very close to the channel capacity and its structure is relatively simple, therefore it is included by some standards. However, there is little research on the blind symbol detection without knowing the CSI and blind channel identification. By introducing some redundancy, a new V-BLAST scheme is proposed in this paper so t... View full abstract»

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  • Blind source recovery for non-minimum phase surroundings

    Publication Year: 2004, Page(s): V
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (262 KB) | HTML iconHTML

    This paper revisits the issue of blind source recovery (BSR) of non-minimum phase linear MIMO systems and provides a new rigorous derivation of the proposed state space algorithms by K. Waheed and F.M. Salem (2002), K. Waheed F.M. Salem (2003) and L.Q. Zhang et al. (1999). Using state space representation for both the mixing and convolving (or reverberative) surrounding environment and recovery (o... View full abstract»

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  • Sparse component analysis of overcomplete mixtures by improved basis pursuit method

    Publication Year: 2004, Page(s): V
    Cited by:  Papers (6)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (482 KB) | HTML iconHTML

    We formulate conditions under which we can solve precisely the blind source problem (BSS) in the under-determined case (less sensors than sources), up to permutation and scaling of sources. Under these conditions, which include information about sparseness of the sources (and hence we call the problem sparse component analysis (SCA, we can: 1) identify the mixing matrix uniquely (up to scaling and... View full abstract»

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  • A dual mode decision feedback equalizer employing the conjugate gradient algorithm

    Publication Year: 2004, Page(s): V
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (263 KB) | HTML iconHTML

    Decision feedback equalizers are commonly employed to reduce the error caused by intersymbol interference. In this paper, we propose a decision feedback equalizer (DFE) that automatically switches between the constant modulus algorithm (CMA) and the decision-directed algorithm (DD). Performance is compared with a CMA-DFE. To improve the slow convergence characteristics of the LMS algorithm, the co... View full abstract»

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  • Blind uplink space-time channel estimation for space-time coded multicarrier code division multiple access systems

    Publication Year: 2004, Page(s): V
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (247 KB) | HTML iconHTML

    The uplink of a space-time coded multicarrier code division multiple access (MS-CDMA) system equipped with a uniform linear array (ULA) at the base station is investigated. Transmission takes place over frequency-selective fading channels and the goal is to blindly estimate the space-time channels and the directions of arrival (DOA) for all active users in one macrocell. An auxiliary matrix includ... View full abstract»

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  • A polynomial method for blind identification of MIMO channels

    Publication Year: 2004, Page(s): V
    Cited by:  Papers (1)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (261 KB) | HTML iconHTML

    In this paper, the blind identification problem for a multiple-input multiple-output (MIMO) channel is investigated by applying the spectral factorization method. The existing conditions on blind identification from signal's second order statistics (SOS) are relaxed by introducing an MIMO pre-filter in the transmitting side of the channel. A design criterion of the pre-filter in the frequency doma... View full abstract»

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  • Fast force-directed/simulated evolution hybrid for multiobjective VLSI cell placement

    Publication Year: 2004, Page(s): V
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (342 KB) | HTML iconHTML

    VLSI standard cell placement is a hard optimization problem, which is further complicated with new issues such as power dissipation and performance. In this work, a fast hybrid algorithm is designed to address this problem. The algorithm employs simulated evolution (SE), an iterative search heuristic that comprises three steps: evaluation, selection and allocation. Solution quality is a strong fun... View full abstract»

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