Scheduled System Maintenance:
On Wednesday, July 29th, IEEE Xplore will undergo scheduled maintenance from 7:00-9:00 AM ET (11:00-13:00 UTC). During this time there may be intermittent impact on performance. We apologize for any inconvenience.
By Topic

Signal Processing Letters, IEEE

Issue 1 • Date Jan. 2004

Filter Results

Displaying Results 1 - 23 of 23
  • Table of contents

    Publication Year: 2004 , Page(s): 01
    Save to Project icon | Request Permissions | PDF file iconPDF (35 KB)  
    Freely Available from IEEE
  • IEEE Signal Processing Letters Society Information

    Publication Year: 2004 , Page(s): 0_2
    Save to Project icon | Request Permissions | PDF file iconPDF (36 KB)  
    Freely Available from IEEE
  • Blind multiuser detection by kurtosis maximization/minimization

    Publication Year: 2004 , Page(s): 1 - 4
    Cited by:  Papers (8)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (136 KB) |  | HTML iconHTML  

    Blind multiuser detection is studied in the presence of multipath distortion. The kurtosis of the receiver's output is minimized with respect to the receiver's parameters subject to multiple linear constraints. The constraints are dependent on the spreading codes of the user of interest. In order to combine multipath signals optimally, the kurtosis is parameterized by the constraint vector as well... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Joint design of channel-optimized multistage vector quantizer

    Publication Year: 2004 , Page(s): 5 - 7
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (112 KB) |  | HTML iconHTML  

    A novel channel-optimized multistage vector quantization (COMSVQ) codec is presented in which the stage codebooks are jointly designed. The proposed codec uses a signal source and channel-dependent distortion measure to encode line spectral frequencies derived from segments of a speech signal. Simulation results are provided to demonstrate the consistent reduction in the spectral distortion obtain... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Frames and sampling theorems for translation-invariant subspaces

    Publication Year: 2004 , Page(s): 8 - 11
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (128 KB) |  | HTML iconHTML  

    A sampling theorem for frames in translation-invariant subspaces of L2(R) is established, which is a generalization of a result of W. Chen and S. Itoh for Riesz bases (see IEEE Trans. Sig. Processing, vol.46, p.2822-4, 1998). Then, some necessary conditions for sampling are derived for Riesz bases. Some relationships and properties are also derived about the relevant functions. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A matching-pursuit/GSIC-based algorithm for DS-CDMA sparse-channel estimation

    Publication Year: 2004 , Page(s): 12 - 15
    Cited by:  Papers (17)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (160 KB) |  | HTML iconHTML  

    A sparse-channel estimation algorithm for multiuser environments is developed with application to time-of-arrival (TOA)-based radiolocation. To eliminate multiple-access interference (MAI), the generalized successive interference cancellation (GSIC) algorithm is used. At each GSIC stage, the matching-pursuit (MP) or least squares (LS) methods are used to estimate the sparse channel. The GSIC/MP an... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Fingerprint enhancement in the singular point area

    Publication Year: 2004 , Page(s): 16 - 19
    Cited by:  Papers (29)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (360 KB) |  | HTML iconHTML  

    Minutiae extraction is one of the most important steps for automatic fingerprint identification systems. However, the performance of minutiae extraction relies heavily on an enhancement algorithm. There are many enhancement algorithms that depend on the local orientation field of the fingerprint. In the singular point area, because the local orientation changes very rapidly, enhancement is not acc... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Nonasymptotic statistical performance of beamforming for deterministic signals

    Publication Year: 2004 , Page(s): 20 - 22
    Cited by:  Papers (7)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (152 KB) |  | HTML iconHTML  

    The purpose of this letter is to investigate, in the deterministic case, the nonasymptotic behavior of beamforming estimation of the direction of arrival of a single source impinging on a uniform linear array. We derive an approximate analytical expression of the maximum-likelihood mean-squared error that is valid for all SNR ranges and number of snapshots. Computer simulations confirm the validit... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Nonasymptotic performance analysis of beamforming with stochastic signals

    Publication Year: 2004 , Page(s): 23 - 25
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (136 KB) |  | HTML iconHTML  

    This letter is devoted to the analysis of the nonasymptotic behavior of beamforming for the bearing estimation of a single stochastic source impinging on an uniform linear array. An analytic expression of the maximum-likelihood mean-squared error is derived. This general expression is valid at any SNR and for any number of snapshots. Simulation results verify the analytically predicted performance... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A robust algorithm for linearly constrained adaptive beamforming

    Publication Year: 2004 , Page(s): 26 - 29
    Cited by:  Papers (17)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (176 KB) |  | HTML iconHTML  

    A new approach to robust adaptive beamforming for wideband array signals is proposed. General steering vector errors, such as direction-of-arrival mismatch and array positional error, are modeled by "time-delay errors" and compensated for by self-adjusted interpolation filtering. The proposed method effectively overcomes the target-signal cancellation problem without suffering from loss in the deg... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A subspace tracking algorithm using the fast Fourier transform

    Publication Year: 2004 , Page(s): 30 - 32
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (136 KB) |  | HTML iconHTML  

    E.C. Real et al. have presented an algorithm for fast tracking of a signal subspace or interference subspace for application in adaptive detection or estimation (see ICASSP '97; IEEE Trans. Sig. Processing, vol.47, p.1036-45, 1999). For cases in which the signal matrix is formed from a single-channel discrete-time signal, we show how one can further reduce computation in the fast approximate subsp... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Temporal decomposition based on a rate-distortion criterion

    Publication Year: 2004 , Page(s): 33 - 35
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (160 KB) |  | HTML iconHTML  

    This letter addresses a temporal decomposition (TD) technique that is based on a rate-distortion criterion. In the proposed TD scheme, a set of interpolation functions is constructed from a given training corpus, and the optimum target points are found in the sense of minimizing, not only spectral distortion, but also bit rates. The results of the simulation show that an average spectral distortio... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Proposal of a speech detector based on eigenspectra

    Publication Year: 2004 , Page(s): 36 - 39
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (144 KB) |  | HTML iconHTML  

    This letter deals with the problem of speech detection in the context of hands-free telecommunications. The principle of the detectors studied is based on the coherence function (ordinary or partial coherence), which is usually computed from the periodogram (first approach). The present work is aimed at proposing a new approach to compute the coherence from the eigenspectra with a view to reduce t... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Discriminative training for concatenative speech synthesis

    Publication Year: 2004 , Page(s): 40 - 43
    Cited by:  Papers (2)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (128 KB)  

    In this letter, we propose an approach to train the cost functions used for unit selection in concatenative speech synthesis. We first view the unit selection as a classification problem, and we apply the discriminative training technique, which is found to be an efficient way to perform parameter estimation in speech recognition. Instead of defining an objective function that accounts for the sub... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A hybrid subband adaptive system for speech enhancement in diffuse noise fields

    Publication Year: 2004 , Page(s): 44 - 47
    Cited by:  Papers (11)  |  Patents (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (640 KB) |  | HTML iconHTML  

    Performance of adaptive noise cancellation (ANC) degrades severely when uncorrelated noise components are present at the two inputs. Thus, practical background diffuse noises pose a serious problem for ANC systems. In this letter, we propose a new hybrid system that integrates subband adaptive filters (SAFs) and a Wiener filter. The hybrid system is implemented on an oversampled DFT filterbank tha... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Differential of the mutual information

    Publication Year: 2004 , Page(s): 48 - 51
    Cited by:  Papers (9)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (136 KB) |  | HTML iconHTML  

    In this letter, we compute the variation of the mutual information, resulting from a small variation in its argument. Although the result can be applied in many problems, we consider only one example: the result is used for deriving a new method for blind source separation in linear mixtures. The experimental results emphasize the performance of the resulting algorithm. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Elliptic-cylindrical wavelets: the Mathieu wavelets

    Publication Year: 2004 , Page(s): 52 - 55
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (152 KB) |  | HTML iconHTML  

    This note introduces a new family of wavelets and a multiresolution analysis that exploits the relationship between analyzing filters and Floquet's solution of Mathieu differential equations. The transfer function of both the detail and the smoothing filter is related to the solution of a Mathieu equation of the odd characteristic exponent. The number of notches of these filters can be easily desi... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A normalized robust mixed-norm adaptive algorithm for system identification

    Publication Year: 2004 , Page(s): 56 - 59
    Cited by:  Papers (12)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (272 KB) |  | HTML iconHTML  

    A normalized robust mixed-norm (NRMN) algorithm for system identification in the presence of impulsive noise is introduced. The standard robust mixed-norm (RMN) algorithm exhibits slow convergence, requires a stationary operating environment, and employs a constant step-size that needs to be determined a priori. To overcome these limitations, the proposed NRMN algorithm introduces a time-varying l... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • IEEE Signal Processing Letters Information for authors

    Publication Year: 2004 , Page(s): 60 - 61
    Save to Project icon | Request Permissions | PDF file iconPDF (44 KB)  
    Freely Available from IEEE
  • IEEE Transactions on Speech and Audio Processing Special Issue on Data Mining of Speech, Audio and Dialog

    Publication Year: 2004 , Page(s): 62
    Save to Project icon | Request Permissions | PDF file iconPDF (134 KB)  
    Freely Available from IEEE
  • IEEE copyright form

    Publication Year: 2004 , Page(s): 63 - 64
    Save to Project icon | Request Permissions | PDF file iconPDF (1057 KB)  
    Freely Available from IEEE
  • IEEE Signal Processing Society Information

    Publication Year: 2004 , Page(s): 0_3
    Save to Project icon | Request Permissions | PDF file iconPDF (29 KB)  
    Freely Available from IEEE
  • Blank page [back cover]

    Publication Year: 2004 , Page(s): 04
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | PDF file iconPDF (2 KB)  
    Freely Available from IEEE

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
Peter Willett
University of Connecticut
Storrs, CT 06269
peter.willett@uconn.edu