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# IEEE Transactions on Signal Processing

## Issue 5  Part 1 • May 2007

This issue contains several parts.Go to:  Part 2

## Filter Results

Displaying Results 1 - 25 of 43

Publication Year: 2007, Page(s):C1 - C4
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• ### IEEE Transactions on Signal Processing publication information

Publication Year: 2007, Page(s): C2
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• ### A Bayesian Approach to Multiple Target Detection and Tracking

Publication Year: 2007, Page(s):1589 - 1604
Cited by:  Papers (58)
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This paper considers the problem of simultaneously detecting and tracking multiple targets. The problem can be formulated in a Bayesian framework and solved, in principle, by computation of the joint multitarget probability density (JMPD). In practice, exact computation of the JMPD is impossible, and the predominant challenge is to arrive at a computationally tractable approximation. A particle fi... View full abstract»

• ### Transient Detection With Cross Wavelet Transforms and Wavelet Coherence

Publication Year: 2007, Page(s):1605 - 1611
Cited by:  Papers (22)
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Effective detection of unknown, transient oscillations in strong, colored, time varying noise and clutter has remained a signal processing challenge. Recently we presented a self-normalized wavelet detector for this purpose. Here, we revisit this detection problem for the case of a tapered, complex, transient oscillation observed coherently in two time series. We develop and compare three detector... View full abstract»

• ### Detecting Encrypted Stepping-Stone Connections

Publication Year: 2007, Page(s):1612 - 1623
Cited by:  Papers (28)
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Stepping-stone attacks are often used by network intruders to hide their identities. In a stepping-stone attack, attacking commands are sent indirectly to the victim through a chain of compromised hosts acting as "stepping stones." In defending against such attacks, it is necessary to detect stepping-stone connections at the compromised hosts. The use of encrypted connections by the attacker compl... View full abstract»

• ### A Nonlinear $M$-Estimation Approach to Robust Asynchronous Multiuser Detection in Non-Gaussian Noise

Publication Year: 2007, Page(s):1624 - 1633
Cited by:  Papers (9)
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A nonlinear M-estimation approach is proposed to solve the multiuser detection problem in asynchronous code-division multiple-access (CDMA) systems where the ambient noise is impulsive and the delays are not known. We treat the unknown delays as nuisance parameters and the transmitted symbols as parameters of interest. We also analyze the asymptotic performance of the proposed estimator and propos... View full abstract»

• ### Rate-Constrained Distributed Estimation in Wireless Sensor Networks

Publication Year: 2007, Page(s):1634 - 1643
Cited by:  Papers (98)
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In this paper, we consider the distributed parameter estimation in wireless sensor networks where a total bit rate constraint is imposed. We study the optimal tradeoff between the number of active sensors and the quantization bit rate for each active sensor to minimize the estimation mean-square error (MSE). To facilitate the solution, we first introduce a concept of equivalent 1-bit MSE function.... View full abstract»

• ### A Theoretical Framework for Iterative Synchronization Based on the Sum–Product and the Expectation-Maximization Algorithms

Publication Year: 2007, Page(s):1644 - 1658
Cited by:  Papers (23)
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This paper deals with maximum-likelihood (ML) estimation of synchronization parameters for coded transmission systems. In particular, we present a unified framework based on both the sum-product (SP) algorithm and the expectation-maximization (EM) algorithm for the design of iterative synchronizers. The proposed approach is shown to encompass some known iterative synchronizers. In particular, we r... View full abstract»

• ### Mitigation of Error Propagation in Decision Directed OFDM Channel Tracking Using Generalized M Estimators

Publication Year: 2007, Page(s):1659 - 1672
Cited by:  Papers (14)  |  Patents (1)
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We treat decision-directed channel tracking (DDCT) in mobile orthogonal frequency-division multiplexing (OFDM) systems as an outlier contaminated Gaussian regression problem, where the source of outliers are the incorrect symbol decisions. Existing decision-directed estimators such as the expectation-maximization (EM)-based estimators and the 2-D-MMSE estimator do not appropriately downweight inco... View full abstract»

• ### Nonorthogonal Joint Diagonalization/Zero Diagonalization for Source Separation Based on Time-Frequency Distributions

Publication Year: 2007, Page(s):1673 - 1687
Cited by:  Papers (34)  |  Patents (1)
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This paper deals with the blind separation of instantaneous mixtures of source signals using time-frequency distributions (TFDs). We propose iterative algorithms to perform the nonorthogonal zero diagonalization and/or joint diagonalization of given sets of matrices. As an application, we show that the source separation can be realized by applying one of these algorithms to a set of spatial quadra... View full abstract»

• ### On Tracking Properties of Real-Valued Generalized Adaptive Notch Filters

Publication Year: 2007, Page(s):1688 - 1695
Cited by:  Papers (4)
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Generalized adaptive notch filters (GANFs) are used for identification/tracking of quasi-periodically varying dynamic systems and can be considered an extension, to the system case, of classical adaptive notch filters. The paper presents results of local performance analysis of a real-valued GANF algorithm, i.e., algorithm designed to track parameters of a real-valued system. This is an extension ... View full abstract»

• ### Modeling 2-D AR Processes With Various Regions of Support

Publication Year: 2007, Page(s):1696 - 1707
Cited by:  Papers (2)
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We show that there exists a causal 2-D linear process in the nonsymmetric half-plane having the same autocorrelations as a noncausal 2-D linear process in the whole-plane; this property is called the autocorrelation equivalence relation, and can be used for practical fitting and modeling of 2-D processes. Some causal 2-D autoregressive (AR) models with various regions of support are considered suc... View full abstract»

• ### Hierarchical Inference of Unicast Network Topologies Based on End-to-End Measurements

Publication Year: 2007, Page(s):1708 - 1718
Cited by:  Papers (20)
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In this paper, we address the problem of topology discovery in unicast logical tree networks using end-to-end measurements. Without any cooperation from the internal routers, topology estimation can be formulated as hierarchical clustering of the leaf nodes based on pairwise correlations as similarity metrics. Unlike previous work that first assumes the network topology is a binary tree and then t... View full abstract»

• ### A New Active Noise Control Algorithm That Requires No Secondary Path Identification Based on the SPR Property

Publication Year: 2007, Page(s):1719 - 1729
Cited by:  Papers (24)
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Active noise control (ANC) has been widely applied in industry to reduce environmental noise and equipment vibrations. Most available control algorithms require the identification of the secondary path, which increases the control system complexity, contributes to an increased residual noise power, and can even cause the control system to fail if the identified secondary path is not sufficiently c... View full abstract»

• ### Fast Affine Projection Adaptation Algorithms With Stable and Robust Symmetric Linear System Slovers

Publication Year: 2007, Page(s):1730 - 1740
Cited by:  Papers (23)  |  Patents (1)
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This paper proposes two noniterative approaches to solve a symmetric linear system associated with the fast affine projection adaptation algorithm. The first approach, using matrix LDLT factorization, can provide an exact solution at a moderate complexity, in contrast with the fact that existing stable approaches are all approximate. Based on a reciprocating recursion scheme, the second... View full abstract»

• ### Sampling Moments and Reconstructing Signals of Finite Rate of Innovation: Shannon Meets Strang–Fix

Publication Year: 2007, Page(s):1741 - 1757
Cited by:  Papers (178)  |  Patents (17)
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Consider the problem of sampling signals which are not bandlimited, but still have a finite number of degrees of freedom per unit of time, such as, for example, nonuniform splines or piecewise polynomials, and call the number of degrees of freedom per unit of time the rate of innovation. Classical sampling theory does not enable a perfect reconstruction of such signals since they are not bandlimit... View full abstract»

• ### A Unified Approach to Dual Gabor Windows

Publication Year: 2007, Page(s):1758 - 1768
Cited by:  Papers (8)
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In this paper, we describe a new method for studying the invertibility of Gabor frame operators. Our approach can be applied to both the continuous (on Rd) and the finite discrete setting. In the latter case, we obtain algorithms for directly computing the inverse of Gabor frame-type matrices equivalent to those known in the literature. The framework we propose can also be used to deriv... View full abstract»

• ### Comb-Based Decimation Filters for $\Sigma \Delta$ A/D Converters: Novel Schemes and Comparisons

Publication Year: 2007, Page(s):1769 - 1779
Cited by:  Papers (29)
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This paper proposes several novel decimation filtering schemes tailored to the design of SigmaDelta analog-to-digital (A/D) converters. On the one hand, it extends the class of modified-sinc filters introduced by Lo Presti, in order to obtain decimation filters capable of decoding high-order SigmaDelta modulators, say up to the fifth order; on the other hand, it introduces the class of sharpened-m... View full abstract»

• ### Efficient Nonlinear Wiener Model Identification Using a Complex-Valued Simplicial Canonical Piecewise Linear Filter

Publication Year: 2007, Page(s):1780 - 1792
Cited by:  Papers (13)
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This paper proposes an efficient adaptive realization of the Wiener model for the identification of complex-valued nonlinear systems. Using a two-dimensional simplicial canonical piecewise linear filter for the complex-valued nonlinear mapping, we derive a realization of the Wiener model requiring fewer parameters than previous approaches. An adaptive implementation of the proposed Wiener model is... View full abstract»

• ### On the Behavior of the Continuous-Time Spectrogram for Arbitrarily Narrow Windows

Publication Year: 2007, Page(s):1793 - 1802
Cited by:  Papers (7)
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The behavior of the continuous-time (CT) spectrogram, in particular of its first frequency moment (FFM) and instantaneous bandwidth (IB), in the limit of infinitely thin windows is revisited: new insight is gained and novel quantitative results are presented. Power series in the width of the short-time Fourier transform (STFT) window are derived for the CT spectrogram and its moments, which are va... View full abstract»

• ### Nonorthogonal Joint Diagonalization Free of Degenerate Solution

Publication Year: 2007, Page(s):1803 - 1814
Cited by:  Papers (83)
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The problem of approximate joint diagonalization of a set of matrices is instrumental in numerous statistical signal processing applications. For nonorthogonal joint diagonalization based on the weighted least-squares (WLS) criterion, the trivial (zero) solution can simply be avoided by adopting some constraint on the diagonalizing matrix or penalty terms. However, the resultant algorithms may con... View full abstract»

• ### A Fast Multiple-Source Detection and Localization Array Signal Processing Algorithm Using the Spatial Filtering and ML Approach

Publication Year: 2007, Page(s):1815 - 1827
Cited by:  Papers (23)
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We propose a computationally efficient algorithm for detection of multiple signals that also gives a rough estimation of their direction of arrivals (DOAs). The narrowband received signals from a uniform linear array are first filtered by a set of orthogonal filters, e.g., by a fast Fourier transformation, in order to separate the sources into multiple spatial intervals. This transformation conver... View full abstract»

• ### Blind Frequency-Offset Estimation for OFDM/OQAM Systems

Publication Year: 2007, Page(s):1828 - 1838
Cited by:  Papers (24)  |  Patents (14)
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This paper deals with the problem of blind carrier-frequency offset (CFO) estimation in orthogonal frequency-division multiplexing (OFDM) systems based on offset quadrature amplitude modulation (OFDM/OQAM). Specifically, by assuming that the number of subcarriers is sufficiently large, the received signal is modeled as a complex Gaussian random vector (CGRV). Since the OFDM/OQAM signal results to ... View full abstract»

• ### Equalization Techniques for Distributed Space-Time Block Codes With Amplify-and-Forward Relaying

Publication Year: 2007, Page(s):1839 - 1852
Cited by:  Papers (111)
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In this paper, we investigate equalization methods for cooperative diversity schemes over frequency-selective fading channels. Specifically, we consider three equalization schemes proposed originally for conventional space-time block codes (STBC) and extend them to distributed STBC in a cooperative transmission scenario with amplify-and-forward relaying. The distributed STBC equalization schemes a... View full abstract»

• ### The Maximin Adaptive-Array Algorithm for Direct-Sequence Systems

Publication Year: 2007, Page(s):1853 - 1861
Cited by:  Papers (9)
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An adaptive-array algorithm that suppresses interference in a direct-sequence system is proposed. The maximin algorithm differs from alternative algorithms in that it requires neither training sequences, directional information, decision-directed adaptation, nor elaborate computations such as eigenanalysis. The algorithm is derived and implementation details of the maximin processor in a direct-se... View full abstract»

## Aims & Scope

IEEE Transactions on Signal Processing covers novel theory, algorithms, performance analyses and applications of techniques for the processing, understanding, learning, retrieval, mining, and extraction of information from signals

Full Aims & Scope

## Meet Our Editors

Editor-in-Chief
Sergios Theodoridis
University of Athens