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IEEE Transactions on Acoustics, Speech, and Signal Processing

Issue 3 • Date June 1981

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Displaying Results 1 - 25 of 71
  • [Front cover and table of contents]

    Publication Year: 1981, Page(s): 0
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    Freely Available from IEEE
  • Comments on "FFT algorithm for both input and output pruning"

    Publication Year: 1981, Page(s):448 - 449
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (210 KB)

    It is pointed out that the FFT and FW-AT algorithm for both input and output pruning have been described in general matrix form in Russian in 1977. View full abstract»

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  • Editorial

    Publication Year: 1981, Page(s):625 - 626
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    Freely Available from IEEE
  • [Back cover]

    Publication Year: 1981, Page(s): c4
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    Freely Available from IEEE
  • Improvement of delay measurements from sonar arrays via sequential state estimation

    Publication Year: 1981, Page(s):514 - 519
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (664 KB)

    A state-space formulation allows use of Kalman estimation to improve error variance in the measurement of signal delay between sensors by 1) using all-pair measurements, 2) a priori information, and 3) sequential estimation. The formulation is generalized to M sensors in line and results are investigated in detail for M = 3 for extremes of a priori information and measurement error covariance. Use... View full abstract»

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  • Tracking properties of adaptive signal processing algorithms

    Publication Year: 1981, Page(s):439 - 446
    Cited by:  Papers (41)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (792 KB)

    Adaptive signal processing algorithms are often used in order to "track" an unknown time-varying parameter vector. This work develops an upper bound on the mean of the norm-squared error between the unknown parameter vector being tracked and the value obtained by the algorithm. The results require very mild covariance decay rate conditions on the training data and a bounded algorithm. The upper bo... View full abstract»

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  • Algorithms for ambiguity function processing

    Publication Year: 1981, Page(s):588 - 599
    Cited by:  Papers (147)  |  Patents (55)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1544 KB)

    Calculation of the complex ambiguity function is viewed as the basis for joint estimation of the differential delay and differential frequency offset between two waveforms that contain a common component plus additive noise. In many applications, the required accuracy leads to a need for integration over long data sets that can become a challenge for near real-time digital processing. The nature o... View full abstract»

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  • An optimal multisensor source location algorithm for passive sonar with moving source or sensors

    Publication Year: 1981, Page(s):617 - 619
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (400 KB)

    An underwater acoustic source location algorithm, which is a globally optimal joint estimator of source position, course, and speed, in a maximum a posteriori probability (MAP) sense, is described. The algorithm accommodates multiple sensor arrays which need not be planar and which may themselves have motion. System motion is accommodated and restrictions on integration times are for practical pur... View full abstract»

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  • Inherent bias in wavefront curvature ranging

    Publication Year: 1981, Page(s):524 - 527
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (504 KB)

    The presence of an inherent bias in conventional wavefront curvature ranging systems is demonstrated, and an approximate form is derived. This bias represents a fundamental limit on the ranging performance of such systems and results from the nonlinear character of the ranging equation, in concert with random measurement noise. The bias is shown to be positive (range is overestimated) and proporti... View full abstract»

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  • Connected digit recognition using a level-building DTW algorithm

    Publication Year: 1981, Page(s):351 - 363
    Cited by:  Papers (61)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1320 KB)

    In this paper we present a novel method for recognizing a string of connected digits based upon the use of a recently proposed level-building dynamic time warping (DTW) algorithm. The recognition system attempts to build up the string, level-by-level (i.e., digit-by-digit), by comparing portions of the test string to isolated digit reference patterns. A backtracking procedure is used to find the "... View full abstract»

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  • A note on the application of the Hilbert transform to time delay estimation

    Publication Year: 1981, Page(s):607 - 609
    Cited by:  Papers (47)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (384 KB)

    It is shown that the Hilbert transform may be employed to convert the maximum finding task of a delay estimator to one of finding a zero crossing. The basic theory of the technique is shown and a few applications are described. Its primary application is in servo tracking and servo velocity measurement systems which employ correlation techniques. A review of prior work in this field is given. View full abstract»

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  • Design of ARMA digital filters by pole-zero decomposition

    Publication Year: 1981, Page(s):433 - 439
    Cited by:  Papers (20)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (752 KB)

    A new technique for design of digital filters is presented in this paper. The technique exploits the spectral approximation property of autoregressive modeling to reduce ripple at the edges of the transition band in the filter response. An autoregressive model approximates a given spectrum better at the peaks than at the Valleys. Spectral information around the transition band is transformed into ... View full abstract»

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  • Modeling of time delay and its application to estimation of nonstationary delays

    Publication Year: 1981, Page(s):577 - 581
    Cited by:  Papers (92)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (480 KB)

    A method to model a time delay by a finite impulse response filter is presented. It is useful in simulation work that involves time delays and transforms the time delay estimation problem into one of parameter estimation. The benefits of this approach are the elimination of spectral estimation, a choice of many parameter estimation algorithms, and the capability to track time-varying delays. Two e... View full abstract»

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  • A synthesis of frequency domain filters for time delay estimation

    Publication Year: 1981, Page(s):540 - 548
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (992 KB)

    A simple model for two-channel delay estimation filtering is presented. The problem is subdivided into three classes based on initial assumptions. General filters described in the frequency domain are presented as solutions to these specific classes. It is shown that many of these filters, which include the "Wiener" least-squares estimation filter and classical, matched detection filter, can be de... View full abstract»

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  • Delay estimation and the estimation of coherence and phase

    Publication Year: 1981, Page(s):485 - 490
    Cited by:  Papers (31)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (616 KB)

    The method of delay estimation given in Hamon and Hannan [1] is reviewed and a modification involving autoregressive model fitting is proposed. It is shown how numerical problems associated with the optimization of the criterion used in both the original and modified procedures can be circumvented. The modified procedure and a procedure due to Chan, Riley, and Plant [2] are compared to the Hamon-H... View full abstract»

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  • Optimized lattice-form adaptive line enhancer for a sinusoidal signal in broad-band noise

    Publication Year: 1981, Page(s):702 - 710
    Cited by:  Papers (38)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (872 KB)

    An adaptive filter configuration, known as the adaptive line enhancer (ALE), has previously been suggested by Widrow et al for the detection of sinusoidal signals in wide-band noise. Some refinements of the ALE are suggested in this paper. First, for the special case of a single sinusoid, it is shown that there exists an optimum value of the so-called decorrelation parameter, which in earlier stud... View full abstract»

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  • Delay estimation of disturbances on the basilar membrane

    Publication Year: 1981, Page(s):621 - 623
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (384 KB)

    With current measurement techniques, it is impossible to directly observe the traveling wave on the basilar membrane over its entire length. Treating the mechanical propagation as a pure conduction delay, the travel time to a particular region can be inferred from the phase-frequency characteristics of the neural response. View full abstract»

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  • Analysis of experimental curves using singular value decomposition

    Publication Year: 1981, Page(s):429 - 433
    Cited by:  Papers (1)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (560 KB)

    This paper describes a singular value decomposition (SVD) technique for the analysis of experimental response curves. The SVD of a set of curves shows that curves can be decomposed to become a linear combination of some intrinsic-component patterns. The interpolation of curves can then be reduced to a simple interpolation of weighting coefficients. The SVD method is applied to an estimation proble... View full abstract»

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  • Local steam transit time estimation in a boiling water reactor

    Publication Year: 1981, Page(s):555 - 560
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (656 KB)

    A new correlation method, the so-called "rehocence" [1] or "smoothed coherence transform" (SCOT) [4], for transit time estimation is applied in a boiling water reactor (BWR). The transit time of a propagating perturbation of the coolant density between two points along the propagation path could be measured by noise analysis technique. This is usually performed by directly observing the peak in th... View full abstract»

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  • Error surfaces of recursive adaptive filters

    Publication Year: 1981, Page(s):763 - 766
    Cited by:  Papers (62)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (440 KB)

    For an adaptive filter with N adjustable coefficients or weights, the "error surface" is a plot, in N + 1 dimensions, of the mean-squared error versus the N coefficient values. If the adaptive filter is nonrecursive, the error surface is a quadratic function of the coefficients. With recursive adaptive filters, the error surface is not quadratic and may even have local minima. In this corresponden... View full abstract»

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  • A comparison of LMS adaptive cancellers implemented in the frequency domain and the time domain

    Publication Year: 1981, Page(s):770 - 775
    Cited by:  Papers (14)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (520 KB)

    Adaptive cancelling can be performed in the frequency domain with significant computational savings over time-domain implementations. This paper considers the statistical behavior of a frequency-domain adaptive canceller with white noise inputs, and develops expressions for the mean and variance of the adaptive filter weights, and for the mean-square error (MSE). These are compared to the behavior... View full abstract»

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  • Passive source tracking using sonar time delay data

    Publication Year: 1981, Page(s):614 - 617
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (456 KB)

    The problem of underwater passive tracking using sonar time delays is examined from the viewpoint of coordinate systems. Polar coordinates are advanced as being particularly suited for this problem and a linear polar state variable model is derived. The performance of this filter is analyzed using noisy synthetic sonar time delay data. The use of Doppler frequency data to achieve improved filter p... View full abstract»

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  • On the simulation of a class of time delay estimation algorithms

    Publication Year: 1981, Page(s):534 - 540
    Cited by:  Papers (51)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (736 KB)

    The time delay between signals received at two (or more) sensors has proven to be a useful parameter in passive sonar for estimating the location of an acoustic source. This paper presents the results of a simulation comparing the smoothed coherence transform and maximum likelihood estimation methods to the basic cross correlation technique for time delay estimation. Band-limited random signals wh... View full abstract»

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  • SHARF convergence properties

    Publication Year: 1981, Page(s):659 - 670
    Cited by:  Papers (41)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1320 KB)

    A class of stable algorithms for adapting infinite impulse response (IIR) digital filters based on the concepts of nonlinear stability theory prominent in the control literature is emerging. While this class of adaptive filters offers much promise in practical applications, little has been done toward providing a characterization that would guide selection of design parameters such as adaptation c... View full abstract»

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  • Frequency domain analysis of wraparound error in fast convolution algorithms

    Publication Year: 1981, Page(s):413 - 422
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (872 KB)

    Fast algorithms exist for computing cyclic convolutions. To obtain the linear convolution required for an FIR filter, the data records must be overlapped by at least L - 1 points, where L is the length of the filter impulse response. If the overlap is too small, wraparound error occurs. This error transforms a linear time-invariant filter into a periodic time-varying filter, whose output is period... 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