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IEEE Transactions on Signal Processing

Issue 9 • Sep 1995

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Displaying Results 1 - 25 of 27
  • A constrained notch Fourier transform

    Publication Year: 1995, Page(s):2058 - 2067
    Cited by:  Papers (19)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (756 KB)

    The paper presents a new sliding algorithm for estimating the amplitude and phase of the Fourier coefficients of noise corrupted harmonic signals given a priori knowledge of the signal frequencies. The proposed method is similar in principle to the notch Fourier transform (NFT) technique suggested by Tadokoro et al. [1987] except that it employs an infinite impulse response (IIR) rather than a fin... View full abstract»

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  • On the application of the jackknife to the estimation of the parameters of short multisinusoidal signals using the data-matrix formulation

    Publication Year: 1995, Page(s):2135 - 2143
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (728 KB)

    It is demonstrated that the jackknife can be applied to the estimation of the parameters of a single short segment of a noisy, complex multisinusoid signal where the estimation process itself is based on the data-matrix formulation. The parameters of interest are the frequency, amplitude, and initial phase of each sinusoid, and the key role of the jackknife is to provide an estimate of the standar... View full abstract»

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  • Finite impulse response estimator (FIRE)

    Publication Year: 1995, Page(s):2186 - 2189
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (248 KB)

    FIRE is an optimal filter structure combining a deterministic digital filter and a stochastic filter. A model of the system is described by a stale equation and the output of the system is modeled by an FIR filter. This integrated structure has demonstrated the capability of processing signals contaminated by deterministic band-limited harmonic noises as well as random Gaussian noises. This articl... View full abstract»

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  • A geometric approach to multiple-channel signal detection

    Publication Year: 1995, Page(s):2049 - 2057
    Cited by:  Papers (56)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (732 KB)

    The paper introduces the generalized coherence (GC) estimate and examines its application as a statistic for detecting the presence of a common but unknown signal on several noisy channels. The GC estimate is developed as a natural generalization of the magnitude-squared coherence (MSC) estimate-a widely used statistic for nonparametric detection of a common signal on two noisy channels. The geome... View full abstract»

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  • On the principal domain of the discrete bispectrum of a stationary signal

    Publication Year: 1995, Page(s):2130 - 2134
    Cited by:  Papers (31)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (488 KB)

    The paper presents a simplifying, yet general approach to determining the symmetry structure of a bispectrum. The principal domain (PD) of the bispectrum and its region of positive support are derived in a way that illuminates the controversy surrounding the triangle in the PD, which is called the outer triangle (OT) by Hinich and Wolinsky (1988), where the bispectrum is zero for a stationary rand... View full abstract»

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  • Incoherent receivers in alpha-stable impulsive noise

    Publication Year: 1995, Page(s):2225 - 2229
    Cited by:  Papers (26)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (404 KB)

    We compute an incoherent receiver for demodulation of signals with random phase in additive impulsive noise modeled as a bivariate isotropic Cauchy process. Monte-Carlo simulation clearly shows that the proposed Cauchy receiver has a significantly improved operating characteristic over the corresponding Gaussian receiver. Moreover, the Cauchy receiver is very robust in the entire class of bivariat... View full abstract»

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  • On the determination of the optimal pole position of Laguerre filters

    Publication Year: 1995, Page(s):2079 - 2087
    Cited by:  Papers (52)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (748 KB)

    As is known in the literature, at each stationary point of the squared error (SE) curve of a Laguerre filter at least one of a pair of certain Laguerre coefficients (weights) vanishes. The author describes a very efficient way to compute the derivatives of each one of these coefficients with respect to the pole position of the Laguerre filter. The knowledge of these derivatives makes possible the ... View full abstract»

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  • Computationally efficient angle estimation for signals with known waveforms

    Publication Year: 1995, Page(s):2154 - 2163
    Cited by:  Papers (112)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (912 KB)

    This paper presents a large sample decoupled maximum likelihood (DEML) angle estimator for uncorrelated narrowband plane waves with known waveforms and unknown amplitudes arriving at a sensor array in the presence of unknown and arbitrary spatially colored noise. The DEML estimator decouples the multidimensional problem of the exact ML estimator to a set of 1-D problems and, hence, is computationa... View full abstract»

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  • Bounds for estimation of complex exponentials in unknown colored noise

    Publication Year: 1995, Page(s):2176 - 2185
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (660 KB)

    We consider the problem of estimating the parameters of complex exponentials in the presence of complex additive Gaussian noise with unknown covariance. Bounds are derived for the accuracy of jointly estimating the parameters of the exponentials and the noise. We first present an exact Cramer-Rao bound (CRB) for this problem and specialize it for the cases of circular Gaussian processes and autore... View full abstract»

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  • Computing the inverse DFT with the in-place, in-order prime factor FFT algorithm

    Publication Year: 1995, Page(s):2193 - 2194
    Cited by:  Papers (2)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (228 KB)

    We present a method for computing the inverse discrete Fourier transform (IDFT) by the in-place, in-order prime factor FFT algorithm (PFA). This is achieved by modifying the input and the output index mapping equations. This approach does not result in any additional cost in terms of program length and computational time View full abstract»

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  • On the digital filter associated with Daubechies' wavelets

    Publication Year: 1995, Page(s):2203 - 2205
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (236 KB)

    The magnitude of the filters associated with Daubechies' wavelets nψ is shown to monotonically converge to an ideal highpass filter when n→∞. The rate of the convergence is also given. The magnitude of each filter is shown to be monotonically increasing from [0,π]. The convergence does not have Gibbs' phenomenon View full abstract»

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  • Convergence analysis of finite length blind adaptive equalizers

    Publication Year: 1995, Page(s):2120 - 2129
    Cited by:  Papers (50)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (740 KB)

    The paper presents some new analytical results on the convergence of two finite length blind adaptive channel equalizers, namely, the Godard equalizer and the Shalvi-Weinstein equalizer. First, a one-to-one correspondence in local minima is shown to exist between the Godard and Shalvi-Weinstein equalizers, hence establishing the equivalent relationship between the two algorithms. Convergence behav... View full abstract»

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  • Asymptotically efficient estimation of spectral moments

    Publication Year: 1995, Page(s):2222 - 2225
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB)

    The article studies parametric estimation of spectral moments of a zero-mean complex Gaussian stationary process immersed in independent Gaussian noise. With the merit of the maximum-likelihood (ML) approach as motivation, this work exploits a Whittle's (1953) type objective function that is able to capture the relevant features of the log-likelihood function while being much more manageable. The ... View full abstract»

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  • An adaptive notch filter with improved tracking properties

    Publication Year: 1995, Page(s):2068 - 2078
    Cited by:  Papers (49)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (800 KB)

    An analysis of the properties of an adaptive notch filter (ANF) applied to time-varying frequency tracking is presented. Starting from the derivation of an expression for ANF output power, asymptotically optimal values for the pole contraction and forgetting factors are derived for recursive prediction error (RPE) type ANF algorithms. Based on the obtained results, a new ANF algorithm that include... View full abstract»

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  • Parametric localization of distributed sources

    Publication Year: 1995, Page(s):2144 - 2153
    Cited by:  Papers (191)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (864 KB)

    Most array processing algorithms are based on the assumption that the signals are generated by point sources. This is a mathematical constraint that is not satisfied in many applications. In this paper, we consider situations where the sources are distributed in space with a parametric angular cross-correlation kernel. We propose an algorithm that estimates the parameters of this model using a gen... View full abstract»

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  • Oversampled Gabor representation for transient signals

    Publication Year: 1995, Page(s):2088 - 2094
    Cited by:  Papers (19)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (476 KB)

    Considers the Gabor representation that uses a one-sided exponential window for detection and analysis of transient signals. Earlier results on the critically sampled case are extended to the more practically useful oversampled case. For oversampling by an integer factor, the authors derive an explicit analytical expression for the dual window (dual frame) function required for computing the Gabor... View full abstract»

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  • A maximal invariant framework for adaptive detection with structured and unstructured covariance matrices

    Publication Year: 1995, Page(s):2164 - 2175
    Cited by:  Papers (95)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (940 KB)

    We introduce a framework for exploring array detection problems in a reduced dimensional space by exploiting the theory of invariance in hypothesis testing. This involves calculating a low-dimensional basis set of functions called the maximal invariant, the statistics of which are often tractable to obtain, thereby making analysis feasible and facilitating the search for tests with some optimality... View full abstract»

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  • Nonlinear adaptive IIR digital filter for linear system modeling

    Publication Year: 1995, Page(s):2190 - 2193
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (320 KB)

    The structure and adaptive algorithm of a nonlinear adaptive IIR digital filter is presented. It does not need stability monitoring in the adaptive process, which has always been a computational burden and disturbs the adaptive process in linear adaptive IIR filtering. The individual parameter adaptation scheme is incorporated into the adaptive algorithm to optimally adjust each parameter at every... View full abstract»

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  • A new transform with symmetrical coding performance for Markov (1) signals

    Publication Year: 1995, Page(s):2195 - 2198
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (320 KB)

    Based on the DCT and DST-II, we present a new transform that provides a symmetrical performance for positively and negatively correlated Markov (1) signals (first-order stationary Markov process). A fast computational algorithm is presented. A sufficient condition of symmetrical transforms is also provided, and the idea of constructing the discrete cosine-sine transform (DCST) is then generalized ... View full abstract»

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  • H nonlinear filtering of discrete-time processes

    Publication Year: 1995, Page(s):2205 - 2209
    Cited by:  Papers (61)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (428 KB)

    This correspondence investigates the problem of H estimation of a discrete-time nonlinear process. An estimator, which may be nonlinear, is introduced so that an H-norm-like of what we call a generalized estimation error is guaranteed to be bounded by a prescribed level. Conditions for the existence of such an estimator, and formulae for its derivation, are obta... View full abstract»

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  • Sampling rate conversion systems using a new generalized form of the discrete Fourier transform

    Publication Year: 1995, Page(s):2095 - 2102
    Cited by:  Papers (9)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (580 KB)

    A recursive factorization of the polynomial 1-zN leads to an efficient algorithm for the computation of the discrete Fourier transform (DFT) and the cyclic convolution. The paper introduces a new recursive polynomial factorization of the polynomial when N is highly composite. The factorization is used to define a generalized form of the DFT and to derive an efficient algorithm for the c... View full abstract»

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  • Time-frequency kernel design by the two-dimensional frequency transformation method

    Publication Year: 1995, Page(s):2198 - 2202
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (456 KB)

    A subclass of Cohen's class of time-frequency (TF) distributions is introduced in which the TF distribution kernels are provided via the frequency transformation method (FTM), used in two dimensional (2-D) filter design. The FTM kernels have finite extent in time and frequency and allow the TF distribution to be efficiently implemented in all four domains View full abstract»

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  • Volterra filtering and higher order whiteness

    Publication Year: 1995, Page(s):2209 - 2212
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (404 KB)

    Some properties of Volterra filtering are established. Finite-order, finite-horizon Volterra filtering is investigated as well as its asymptotic properties. Next, the concepts of Volterra unpredictability and uninterpolability lead to generalizations of the notion of white noise to higher orders. These generalizations are introduced and relations are established between them View full abstract»

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  • Digital filter bank design quadratic-constrained formulation

    Publication Year: 1995, Page(s):2103 - 2108
    Cited by:  Papers (80)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (472 KB)

    Formulate the filter bank design problem as an quadratic-constrained least-squares minimization problem. The solution of the minimization problem converges very quickly since the cost function as well as the constraints are quadratic functions with respect to the unknown parameters. The formulations of the perfect-reconstruction cosine-modulated filter bank, of the near-perfect-reconstruction pseu... View full abstract»

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  • Estimating 2-D DOA angles using nonlinear array configurations

    Publication Year: 1995, Page(s):2212 - 2216
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (420 KB)

    This paper modifies the direction-of-arrival matrix (DOAM) method for detecting 2-D direction-of-arrival (DOA) angles of narrowband far-field source signals using nonlinear array configurations. The key modification to the DOAM method is the replacement of the 1-D data model with a 2-D data model. The modified DOA matrix (MDOAM) method requires less computation, detects more sources with the same ... View full abstract»

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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