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IEEE Signal Processing Letters

Issue 1 • Jan. 2006

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Displaying Results 1 - 21 of 21
  • Table of contents

    Publication Year: 2006, Page(s):c1 - c4
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  • IEEE Signal Processing Letters publication information

    Publication Year: 2006, Page(s): c2
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  • Fast modal synthesis by digital waveguide extraction

    Publication Year: 2006, Page(s):1 - 4
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (216 KB) | HTML iconHTML

    From a modal synthesis point of view, digital waveguides allow the efficient synthesis of harmonically spaced components for a fixed number of arithmetic operations. They are thus well suited to audio synthesis based on one-dimensional physical models (such as strings or tubes) that possess nearly harmonic spectra. In higher dimensions, however, modal frequencies do not fall in harmonic series. In... View full abstract»

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  • Low-complexity iterative method of equalization for single carrier with cyclic prefix in doubly selective channels

    Publication Year: 2006, Page(s):5 - 8
    Cited by:  Papers (28)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (232 KB) | HTML iconHTML

    Orthogonal frequency division multiplexing (OFDM) requires an expensive linear amplifier at the transmitter due to its high peak-to-average power ratio (PAPR). Single carrier with cyclic prefix (SC-CP) is a closely related transmission scheme that possesses most of the benefits of OFDM but does not have the PAPR problem. Although in a multipath environment, SC-CP is very robust to frequency-select... View full abstract»

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  • Local and broadcast clock synchronization in a sensor node

    Publication Year: 2006, Page(s):9 - 12
    Cited by:  Papers (18)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (160 KB) | HTML iconHTML

    Energy constrained wireless sensor networks need to maintain network timing for coordinating event detection and processing, and to enable receiver duty cycling and communications rendezvous, in order to save energy. Motivated by this, we consider synchronization of a slow low-power local oscillator with an occasionally observed fast and highly accurate broadcast clock (such as GPS). Errors are mo... View full abstract»

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  • Tracking moving objects in image sequences using 1-D trajectory filter

    Publication Year: 2006, Page(s):13 - 16
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (752 KB) | HTML iconHTML

    The three-dimensional (3-D) Fourier transform of the nonaccelerating object in an image sequence lies on a plane passing through the origin of the 3-D frequency domain. Instead of using a 3-D frequency planar filter, we propose a new filter design technique for object tracking using a one-dimensional trajectory filter-in the spatiotemporal domain. This filter can track a moving object with linear ... View full abstract»

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  • Pseudo-log-polar Fourier transform for image registration

    Publication Year: 2006, Page(s):17 - 20
    Cited by:  Papers (26)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (424 KB) | HTML iconHTML

    A new registration algorithm based on pseudo-log-polar Fourier transform (PLPFT) for estimating large translations, rotations, and scalings in images is developed. The PLPFT, which is calculated at points distributed at nonlinear increased concentric squares, approximates log-polar Fourier representations of images accurately. In addition, it can be calculated quickly by utilizing the Fourier sepa... View full abstract»

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  • Adaptive self-orthogonalizing per-tone decision feedback equalizer for single carrier modulations

    Publication Year: 2006, Page(s):21 - 24
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (296 KB) | HTML iconHTML

    Frequency-domain decision-feedback equalization (FD-DFE) for single carrier modulation avoids interblock interferences (IBIs) by using guard intervals located in between two data blocks. If the period of a guard interval is shorter than that of the channel impulse response, the IBIs cannot be removed by the FD-DFE, which significantly deteriorates its performance. To handle this IBI problem, this ... View full abstract»

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  • Robust DFT with high breakdown point for complex-valued impulse noise environment

    Publication Year: 2006, Page(s):25 - 28
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (224 KB) | HTML iconHTML

    Modification of the robust discrete Fourier transform (DFT) is proposed in order to achieve a high breakdown point for signals corrupted by complex-valued impulse noise with independent real and imaginary parts. Obtained results are compared with existing robust DFT forms. In addition, an adaptive procedure for selection of the modified robust DFT form is developed. View full abstract»

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  • Main beam cochannel interference suppression by range adaptive processing for HFSWR

    Publication Year: 2006, Page(s):29 - 32
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1112 KB) | HTML iconHTML

    The performance of high-frequency (HF) surface wave radar degrades significantly due to cochannel interferences (CCIs) in the user-congested HF band (3-30 MHz). Most of the conventional techniques generally follow a simple spatial adaptive processing (SAP) only in the presence of spatially structured interference, but sometimes, we cannot rely on SAP to cancel interference received through the mai... View full abstract»

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  • Stereophonic acoustic echo cancellation: analysis of the misalignment in the frequency domain

    Publication Year: 2006, Page(s):33 - 36
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (232 KB) | HTML iconHTML

    The performance in terms of misalignment of adaptive algorithms, in general, is dependent on the conditioning of the input signal covariance matrix. The performance of two-channel adaptive algorithms is further degraded by the high interchannel coherence between the two input signals. In this letter, we establish the relationship between interchannel coherence of the two input signals and conditio... View full abstract»

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  • A novel radius-adjusted approach for blind adaptive equalization

    Publication Year: 2006, Page(s):37 - 40
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB) | HTML iconHTML

    A new radius-adjusted approach for blind adaptive equalization for quadrature amplitude modulation (QAM) signals is introduced. Static circular contours are defined around an estimated symbol point in a QAM signal constellation, which creates regions that can be mapped to adaptation phases. The equalizer tap update consists of a linearly weighted sum of adaptation criteria that is scaled by a vari... View full abstract»

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  • A new joint diagonalization algorithm with application in blind source separation

    Publication Year: 2006, Page(s):41 - 44
    Cited by:  Papers (15)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (152 KB) | HTML iconHTML

    In this letter, we present a new nonorthogonal algorithm for joint diagonalization of a set of symmetric matrices. The algorithm alternates between updates of individual demixing matrix rows, and the update of each row is transferred to solving the eigenvector problem. By using some blind source separation simulations, we show that the algorithm obviously obtains an improved performance when the s... View full abstract»

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  • Dimension reduction as a deflation method in ICA

    Publication Year: 2006, Page(s):45 - 48
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (200 KB) | HTML iconHTML

    In independent component analysis (ICA), when using the one-unit contrast function optimization approach to estimate independent components one by one, the constraint of uncorrelatedness between independent components prevents the algorithm from converging to the previously found components. A popular way to achieve uncorrelatedness is the Gram-Schmidt-like decorrelation scheme. In fact, uncorrela... View full abstract»

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  • A unified method for blind separation of sparse sources with unknown source number

    Publication Year: 2006, Page(s):49 - 51
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (160 KB) | HTML iconHTML

    Blind source separation (BSS) is of high interest in practical applications. Some approaches are proposed for the unknown number of sources of the BSS problem. However, they only consider the overdetermined case with the number of sensors more than the number of sources. To implement the practical BSS without prior assumption on the number of sources, we propose a new BSS method. It uses the unsup... View full abstract»

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  • Combining evidence from residual phase and MFCC features for speaker recognition

    Publication Year: 2006, Page(s):52 - 55
    Cited by:  Papers (124)  |  Patents (50)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (216 KB) | HTML iconHTML

    The objective of this letter is to demonstrate the complementary nature of speaker-specific information present in the residual phase in comparison with the information present in the conventional mel-frequency cepstral coefficients (MFCCs). The residual phase is derived from speech signal by linear prediction analysis. Speaker recognition studies are conducted on the NIST-2003 database using the ... View full abstract»

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  • Automatic speech recognition with a modified Ephraim-Malah rule

    Publication Year: 2006, Page(s):56 - 59
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB) | HTML iconHTML

    A soft decision gain modification is introduced and applied to the Ephraim-Malah gain function based on maximum mean-square-error estimation after amplitude compression. Nonlinear evaluations of the noise overestimation factor and spectral floor are used in the same way for the proposed gain modification and for nonlinear spectral subtraction (NSS). Consistent and statistically significant automat... View full abstract»

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  • IEEE Signal Processing Letters Information for authors

    Publication Year: 2006, Page(s):60 - 61
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  • Fourth IEEE Workshop on Sensor Array and Multi-channel Processing (SAM-2006)

    Publication Year: 2006, Page(s): 62
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  • IEEE copyright form

    Publication Year: 2006, Page(s):63 - 64
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  • IEEE Signal Processing Society Information

    Publication Year: 2006, Page(s): c3
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Aims & Scope

The IEEE Signal Processing Letters is a monthly, archival publication designed to provide rapid dissemination of original, cutting-edge ideas and timely, significant contributions in signal, image, speech, language and audio processing.

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
James E. Fowler
Dept Electrical & Computer Engineering
Associate Director                         
Distributed Analytics and Security Institute
Mississippi State University
Mississippi State, MS 39762 USA
fowler@ece.msstate.edu