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IEEE Transactions on Acoustics, Speech, and Signal Processing

Issue 3 • June 1986

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Displaying Results 1 - 25 of 38
  • [Front cover and table of contents]

    Publication Year: 1986, Page(s): 0
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    Freely Available from IEEE
  • Correction to "Fast Hankel transform algorithm"

    Publication Year: 1986, Page(s):623 - 624
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (208 KB)

    First Page of the Article
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  • On the evaluation of double square integral in the (s1, s2) complex biplane

    Publication Year: 1986, Page(s):630 - 632
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (221 KB)

    In this correspondence, a method of evaluating the double square integralintmin{0}max{infin}intmin{0}max{infin} [h(t_{1}, t_{2})]^{2} dt_{1} dt_{2}= frac{1}{(2pij)^{2}} intmin{-jinfin}max{jinfin}intmin{-jinfin}max{jinfin} H(-s_{1}, -s_{2}) ds_{1} ds_{2}whereh(t_{1}, t_{2}) = L^{-1} [H(s_{1}, s_{2})]is discussed. The method of evaluation is based on using the double... View full abstract»

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  • Corrections to "The statistical performance of the MUSIC and the minimum-norm algorithms in resolving plane waves in noise"

    Publication Year: 1986, Page(s): 633
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (141 KB)

    First Page of the Article
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  • [Back cover]

    Publication Year: 1986, Page(s): c4
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    Freely Available from IEEE
  • Detection performance of the circular correlation coefficient receiver

    Publication Year: 1986, Page(s):399 - 404
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (592 KB)

    The complex circular correlation detector is analyzed for the case of one complex sinusoid in complex white Gaussian noise. The distribution function of the squared modulus of the circular serial correlation coefficient is found when no signal is present, allowing computation of the detection threshold. For small data records, as is typical in radar applications, the performance of the correlation... View full abstract»

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  • Information theory measures with application to model identification

    Publication Year: 1986, Page(s):511 - 517
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (616 KB)

    The identification of the order of a model which is fitted to data is of central importance. We have considered in this paper an information theoretic criterion, the AIC, which has found considerable use in many diverse applications. Our discussion is presented with various points in mind. First of all, since the theory of the AIC appears in the statistical literature in a complex form, we have at... View full abstract»

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  • A parallel least-squares linear prediction method based on the circular lattice filter

    Publication Year: 1986, Page(s):640 - 642
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB)

    In this correspondence, we propose a parallel least-squares method for linear prediction and estimation based on the circular lattice filter. Instead of minimizing the total sum of prediction errors, the method proceeds by dividing the sum into several parts and then minimizing each part in parallel, and then averaging the resulting estimates to form a final estimate. It is shown that this estimat... View full abstract»

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  • An all-digital realization of a baseband DLL implemented as a dynamical state estimator

    Publication Year: 1986, Page(s):535 - 545
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1112 KB)

    The delay-locked-loop (DLL) is a device that automatically adjusts a local delay estimate to the time delay between two versions of an incoming signal. It has been shown that, in the sense of local variance, this device performs equally as well as the maximum-likelihood estimator, whereas the implementation cost can be reduced considerably. Several publications describe digital or hybrid implement... View full abstract»

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  • Performance of transform-domain LMS adaptive digital filters

    Publication Year: 1986, Page(s):499 - 510
    Cited by:  Papers (155)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1224 KB)

    In this paper we analyze the performance, particularly the convergence behavior, of the transform-domain least mean-square (LMS) adaptive digital filter (ADF) using the discrete Fourier transform and discrete orthogonal transforms such as discrete cosine and sine transforms. We first obtain the optimum Wiener solution and the minimum mean-squared error (MSE) in the transform domain. It is shown th... View full abstract»

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  • An algorithm for pole-zero modeling and spectral analysis

    Publication Year: 1986, Page(s):637 - 640
    Cited by:  Papers (176)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (480 KB)

    An explicit connection between fitting exponential models and pole-zero models to observed data is made. The fitting problem is formulated as a constrained nonlinear minimization problem. This problem is then solved using a simplified iterative algorithm. The algorithm is applied to simulated data, and the performance of the algorithm is compared to previous results. View full abstract»

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  • Adaptive Gaussian filtering in routine ECG/VCG analysis

    Publication Year: 1986, Page(s):527 - 534
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (760 KB)

    Different types of filters are used in systems for the analysis of electrocardiograms and/or vectorcardiograms. These filters are mostly locally used to enhance the relevant signal components in order to improve the performance of one or more subtasks or modules rather than to provide filtered signals to be used in the feature extraction and classification part of the system. Filters are also used... View full abstract»

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  • The discrete Gerchberg algorithm

    Publication Year: 1986, Page(s):624 - 626
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (240 KB)

    The discrete version of the Gerchberg algorithm for iterative restoration of a time-constrained function from only partial knowledge of its spectrum (or vice versa) is analyzed. Although convergence is guaranteed, eigenvalues close to unity inhibit iteration to the limit. Identification of these large eigenvalues, allowing extrapolation to the limit, is described. View full abstract»

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  • MEM and ARMA estimators of signal carrier frequency

    Publication Year: 1986, Page(s):618 - 620
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (272 KB)

    Two estimators for the carrier frequency of different classes of signals are proposed. These estimators are based on modeling the signal with either an autoregressive AR (2) model, or a mixed autoregressive, moving-average, ARMA (2, 2) model. In addition, an equation is derived to obtain the spectrum peak frequencies directly from the model parameters, thus eliminating the step of calculating the ... View full abstract»

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  • Nonlinear mean filters in image processing

    Publication Year: 1986, Page(s):573 - 584
    Cited by:  Papers (106)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1424 KB)

    The use of nonlinear means in image processing is introduced. The properties of these means in the presence of different types of noise are investigated. It is shown that nonlinear filters based on these means behave well for both additive and impulse noise. Their performance in the presence of signal dependent noise is satisfactory. They preserve the edges better than linear filters, and they rej... View full abstract»

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  • Algebraic approach to system identification

    Publication Year: 1986, Page(s):462 - 469
    Cited by:  Papers (40)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (848 KB)

    A variety of identification procedures exists for estimating the parameters of an autoregressive moving-average (ARMA) process from noise-free excitation and noise-contaminated response data. In this paper, an identification procedure is proposed for the more realistic situation in which both the excitation and response are contaminated by white noises. The method is based upon the null space char... View full abstract»

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  • Multichannel relative-entropy spectrum analysis

    Publication Year: 1986, Page(s):554 - 564
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1232 KB)

    A new relative-entropy method is presented for estimating the power spectral density matrix for multichannel data, given correlation values for linear combinations of the channels, and given an initial estimate of the spectral density matrix. A derivation of the method from the relative-entropy-principle is given. The basic approach is similar in spirit to the multisignal relative-entropy spectrum... View full abstract»

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  • Recursive center-frequency adaptive filters for the enhancement of bandpass signals

    Publication Year: 1986, Page(s):633 - 637
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (544 KB)

    In some signal enhancement and tracking applications, where a priori information regarding the signal bandwidth and spectral shape is available, it is suggested to use a recursive center-frequency adaptive filter instead of a fully adaptive filter. A new adaptive algorithm, namely, the recursive maximum-mean-squares (RMXMS) algorithm, is developed based on the gradient ascent technique for the imp... View full abstract»

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  • VLSI architecture for dynamic time-warp recognition of handwritten symbols

    Publication Year: 1986, Page(s):603 - 613
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1048 KB)

    The method of dynamic time warping is a well-established technique for time alignment and comparison of speech and image patterns. It has found extensive application in speech recognition and related areas of pattern matching. Comparing the handwritten symbol to the set of training symbols (called reference symbols), we can recognize the input handwritten symbol by computing the distances among th... View full abstract»

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  • Estimation of phase angles from the cross-spectral matrix

    Publication Year: 1986, Page(s):405 - 422
    Cited by:  Papers (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1784 KB)

    The so-called signal subspace methods in spatial signal processing have been used up to now in the case of steering vectors depending upon very few parameters. For instance, they are used currently for steering vectors of the form (1, e, e2iθ, ... , ei(N-1)θ)Twhich occur in the case of plane waves and a linear array of N equispaced senso... View full abstract»

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  • Adaptive nonlinear digital filters using distributed arithmetic

    Publication Year: 1986, Page(s):518 - 526
    Cited by:  Papers (39)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (784 KB)

    A nonlinear adaptive filter structure, based upon the theory of the truncated discrete Volterra series, is presented. A memory-oriented implementation exploiting distributed arithmetic is considered, and the conventional LMS adaptation algorithms are suitably modified. Memory-size reduction methods are developed to obtain simpler actual realizations. Computer simulation results are presented. View full abstract»

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  • A recursive algorithm for linear system identification

    Publication Year: 1986, Page(s):492 - 498
    Cited by:  Papers (1)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (512 KB)

    This paper deals with the pole-zero identification of a linear system from a measured input-output record. It is shown that the minimization of a modified version of the squared Kalman equation error can be implemented by an order recursive algorithm in the time domain. The algorithm is based on the Gram-Schmidt orthogonalization of intertwined Krylov sequences involving a skew self-adjoint linear... View full abstract»

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  • Modal decomposition signal subspace algorithms

    Publication Year: 1986, Page(s):585 - 602
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1824 KB)

    A new method of estimating the locations of multiple wide-band emitters arriving at an array of sensors is presented in this paper. The wide-band emitter location problem is treated as a separable multidimensional spectrum estimation problem by modal decomposition of the estimated spectral factor or spectral density matrix at the poles of the emitters. This modal decomposition method extends conve... View full abstract»

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  • General in-place calculation of discrete Fourier transforms of multidimensional sequences

    Publication Year: 1986, Page(s):565 - 572
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (632 KB)

    The computation of the discrete Fourier transform (DFT) of real multidimensional sequences requires an extraordinary amount of computer memory. The in-place calculation of the discrete Fourier transform reduces the required memory and is thus highly desirable. The present paper relies on the conjugate property of the generalized DFT in order to define novel, advantageous algorithms for the in-plac... View full abstract»

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  • Some properties of a class of rank order smoothers

    Publication Year: 1986, Page(s):614 - 615
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (248 KB)

    A class of rank order smoothers, which operate by minimizing a piecewise linear objective function, is considered. Nonrecursive versions have many properties similar to repeated median smoothing, and most of these properties are relevant, with qualifications, to recursive versions of the class. Smoothed values are medians in their neighborhoods. A root signal is obtained, but advantageously in onl... View full abstract»

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Aims & Scope

This Transactions ceased production in 1990. The current retitled publication is IEEE Transactions on Signal Processing.

Full Aims & Scope