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IEEE Signal Processing Letters

Issue 7 • July 2012

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Displaying Results 1 - 25 of 26
  • [Front cover]

    Publication Year: 2012, Page(s): C1
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  • IEEE Signal Processing Letters publication information

    Publication Year: 2012, Page(s): C2
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  • Table of Contents

    Publication Year: 2012, Page(s):381 - 382
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  • Sum Rate Analysis of One-Pico-Inside OFDMA Network With Opportunistic Scheduling and Selective Feedback

    Publication Year: 2012, Page(s):383 - 386
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1186 KB) | HTML iconHTML

    In this letter, we investigate the sum rate performance of a generic one-pico-inside OFDMA network with opportunistic scheduling policy and the best-M partial feedback design. By a detailed examination of the statistical property of the selected user's signal-to-interference-plus-noise ratio and its interplay with intercell interference, we derive the exact closed form expression for the sum rate ... View full abstract»

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  • Symmetric Self-Hilbertian Wavelets via Orthogonal Lattice Optimization

    Publication Year: 2012, Page(s):387 - 390
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (987 KB) | HTML iconHTML

    Orthonormal Hilbert pairs of wavelets that are time-reverse (mirror image) versions of each are termed Symmetric Self-Hilbertian wavelets and are used in the dual-tree complex wavelet transform. Previous methods for constructing the corresponding scaling low-pass filter are based on optimizing the product filter. These methods are practical only when the number of free-parameters is small due to t... View full abstract»

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  • Discriminative Sparsity Preserving Projections for Semi-Supervised Dimensionality Reduction

    Publication Year: 2012, Page(s):391 - 394
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1088 KB) | HTML iconHTML

    In this letter, we propose a semi-supervised dimensionality reduction method named Discriminative Sparsity Preserving Projection (DSPP). In order to get the feature mapping f which projects the high-dimensional data into a low-dimensional intrinsic space, DSPP attempts to maintain the prior low-dimensional representation constructed by the data points and the known class labels and, meanwhi... View full abstract»

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  • Image Noise Estimation Using A Variation-Adaptive Evolutionary Approach

    Publication Year: 2012, Page(s):395 - 398
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (730 KB) | HTML iconHTML

    The estimation of noise statistics is critical to optimize many computer vision algorithms. The main issue is how to identify the homogeneous image patches for estimating the noise statistics. The smallest variance used in the conventional approaches is not always a good measure of homogeneity of image patches. In addition, the conventional approaches neglect the fact that homogeneous image patche... View full abstract»

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  • Efficient Joint Source and Sensor Localization in Closed-Form

    Publication Year: 2012, Page(s):399 - 402
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1036 KB) | HTML iconHTML

    This letter considers the problem of simultaneously locating multiple disjoint sources and refining erroneous sensor positions using TDOA measurements. The previous work by Yang and Ho to solve this problem cannot provide optimum accuracy for the sensor positions. The proposed estimator improves the previous method so that both the source and the sensor position estimates can achieve the Cramer-Ra... View full abstract»

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  • Detection With Target-Induced Subspace Interference

    Publication Year: 2012, Page(s):403 - 406
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1018 KB) | HTML iconHTML

    In this letter, we consider the detection of a multichannel signal with an unknown amplitude in colored noise, when there is a covariance mismatch between the null and alternative hypotheses. Specifically, the covariance mismatch is caused by a target-induced subspace interference that is present only under the alternative hypothesis. According to the signal model, we propose a detector involving ... View full abstract»

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  • A New Tiling Scheme for 2-D Continuous Wavelet Transform With Different Rotation Parameters at Different Scales Resulting in a Tighter Frame

    Publication Year: 2012, Page(s):407 - 410
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1162 KB) | HTML iconHTML

    A desirable property when dealing with frames is that the low and up bounds of frames should be close to each other. This can accelerate the convergence speed in computing the dual-frame and simplify the process of recovering the signal from its frame coefficients. In this letter, a new 2-D continuous wavelet transform tiling scheme, which uses different rotation factor sampling methods for differ... View full abstract»

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  • Exploration and Exploitation of Reference Frames in Distributed Video Coding

    Publication Year: 2012, Page(s):411 - 414
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (565 KB) | HTML iconHTML

    This letter investigates the impact of reference frames in Distributed Video Coding (DVC) on the Rate-Distortion (RD) performance and reveals that reference frames have the potential to be better side information (SI) than the extensively used interpolated frames. Based on this investigation, we also propose a motion range prediction (MRP) method to exploit reference frames and precisely guide the... View full abstract»

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  • Class-Based Parametric Approximation to Histogram Equalization for ASR

    Publication Year: 2012, Page(s):415 - 418
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (470 KB) | HTML iconHTML

    This letter assesses an improved equalization transformation for robust speech recognition in noisy environments. The proposal is an evolution of the parametric approximation to Histogram Equalization named PEQ into a two-step algorithm dealing separately with environmental and acoustic mismatch. A first parametric equalization is done to eliminate environmental mismatch. These equalized data are ... View full abstract»

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  • A New Reweighted Algorithm With Support Detection for Compressed Sensing

    Publication Year: 2012, Page(s):419 - 422
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (847 KB) | HTML iconHTML

    We propose a new iterative reweighted algorithm with iterative support detection (referred to as RISD) to improve the decoding performance for compressed sensing (CS). The support detection from previous iterations can be interpreted as extracting “prior information” that allows for different reweighting strategies within and without the detected support. The proposed RISD method ach... View full abstract»

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  • A Fast Wavelet-Based Algorithm for Global and Local Image Sharpness Estimation

    Publication Year: 2012, Page(s):423 - 426
    Cited by:  Papers (52)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1087 KB) | HTML iconHTML

    In this letter, we present a simple, yet effective wavelet-based algorithm for estimating both global and local image sharpness (FISH, Fast Image Sharpness). FISH operates by first decomposing the input image via a three-level separable discrete wavelet transform (DWT). Next, the log-energies of the DWT subbands are computed. Finally, a scalar index corresponding to the image's overall sharpness i... View full abstract»

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  • Recovery Guarantees for Rank Aware Pursuits

    Publication Year: 2012, Page(s):427 - 430
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1179 KB) | HTML iconHTML

    This letter considers sufficient conditions for sparse recovery in the sparse multiple measurement vector (MMV) problem for some recently proposed rank aware greedy algorithms. Specifically we consider the compressed sensing framework with Gaussian random measurement matrices and show that the rank of the measurement matrix in the noiseless sparse MMV problem allows such algorithms to reduce the e... View full abstract»

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  • Optimal Step-Size Affine Projection Algorithm

    Publication Year: 2012, Page(s):431 - 434
    Cited by:  Papers (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1129 KB) | HTML iconHTML

    This letter describes how to set up the step size of the affine projection algorithm (APA) based on mean-square deviation analysis. The analysis considers the cross-correlation between the current weight error vector and the prior measurement noises associated with the reused inputs vectors for better prediction of the learning behavior of the APA. With the predetermined step size based on the ana... View full abstract»

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  • Subspace-Based Channel Estimation for MIMO-OFDM Systems With Few Received Blocks

    Publication Year: 2012, Page(s):435 - 438
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1257 KB) | HTML iconHTML

    We propose a method of obtaining the autocorrelation matrix to improve the performance of the subspace-based channel estimation method. By exploiting the circulant property of the received signal, the proposed method reduces the number of received blocks required to satisfy the persistency of excitation (POE) criterion for the input and decreases the residual error which affects the accuracy of th... View full abstract»

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  • Action Recognition Using Context-Constrained Linear Coding

    Publication Year: 2012, Page(s):439 - 442
    Cited by:  Papers (26)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (728 KB) | HTML iconHTML

    Although traditional bag-of-words model has shown promising results for action recognition, it takes no consideration of the relationship among spatio-temporal points; furthermore, it also suffers serious quantization error. In this letter, we propose a novel coding strategy called context-constrained linear coding (CLC) to overcome these limitations. We first calculate the contextual distance bet... View full abstract»

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  • Linear MMSE Processing Design for 3-Phase Two-Way Cooperative MIMO Relay Systems

    Publication Year: 2012, Page(s):443 - 446
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (926 KB) | HTML iconHTML

    This letter addresses the joint linear processing issues for 3-phase two way cooperative MIMO relay systems, aiming to minimize the mean squared error (MMSE). Considering the difficulty to acquire the channel state information (CSI) of the direct link at relay node, we first derive an iterative linear processing scheme for the relay node ignoring the direct link between two source nodes. Then the ... View full abstract»

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  • [Blank page]

    Publication Year: 2012, Page(s):447 - 448
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  • IEEE Signal Processing Letters information for authors

    Publication Year: 2012, Page(s):449 - 450
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  • IEEE Signal Processing Letters EDICS

    Publication Year: 2012, Page(s): 451
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  • Renew your IEEE membership for 2012 and add Signal Processing Society

    Publication Year: 2012, Page(s): 452
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  • Order form for reprints

    Publication Year: 2012, Page(s): 454
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  • IEEE Signal Processing Society Information

    Publication Year: 2012, 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