IEEE Transactions on Acoustics, Speech, and Signal Processing

Issue 1 • February 1985

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Displaying Results 1 - 25 of 52
  • [Front cover and table of contents]

    Publication Year: 1985, Page(s): 0
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    Freely Available from IEEE
  • Fast algorithms for lpdeconvolution

    Publication Year: 1985, Page(s):174 - 182
    Cited by:  Papers (65)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (921 KB)

    This paper discusses two algorithms forl_{p}, 1 leq p leq 2, deconvolution. One, iterative reweighted least squares (IRLS), is discussed with an eye toward improving its computational efficiency, while the other, residual steepest descent (RSD), is considered in an attempt to improve its convergence properties. In the first case, fast Fourier transforms are used to reduce the number of ... View full abstract»

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  • A fast algorithm for solving a Toeplitz system of equations

    Publication Year: 1985, Page(s):254 - 267
    Cited by:  Papers (37)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1468 KB)

    A fast algorithm for the solution of a Toeplitz system of equations is presented. The algorithm requires orderN(log N)^{2}computations where N is the number of equations. For banded Toeplitz matrices the order of computations is reduced to onlyN log N + m(log m)^{2}where 2m is the maximum number of nonzero principal subdiagonals of the Toeplitz matrix. The algorithm is in ess... View full abstract»

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  • Sampling expansions for multiband signals

    Publication Year: 1985, Page(s):312 - 315
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (434 KB)

    The class BIof finite energy signals bandlimited to a set I is considered where I denotes a finite union of disjoint open intervals (bands) on the real frequency axis. If such a signal is sampled uniformly (constant intersample spacing T), it is shown that the following five propositions are equivalent. 1) Any signal in BIis uniquely determined from its uniform samples taken ... View full abstract»

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  • VLSI Silicon compilation and the art of automatic microchip design [Book Reviews]

    Publication Year: 1985, Page(s):336 - 337
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    Freely Available from IEEE
  • Adaptive filtering prediction and control [Book Reviews]

    Publication Year: 1985, Page(s):337 - 338
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    Freely Available from IEEE
  • LC filter design, test, and manufacturing

    Publication Year: 1985, Page(s): 337
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (161 KB)

    First Page of the Article
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  • [Back cover]

    Publication Year: 1985, Page(s): c4
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  • New second-order state-space structures for realizing low roundoff noise digital filters

    Publication Year: 1985, Page(s):106 - 110
    Cited by:  Papers (31)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (432 KB)

    Several new second-order state-space digital filter structures are introduced. Each of the new structures requires one or two less multiplies than the minimum-noise structure, while achieving a round-off noise performance which is nearly as good. Thus, they provide an excellent means of realizing second-order subfilters. When such subfilters are used to construct nth-order filters, the reduction i... View full abstract»

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  • Analysis of delay estimation improvement factors due to multiple measurements and A priori information

    Publication Year: 1985, Page(s):46 - 50
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (520 KB)

    Signals from distant sources produce intersensor delays in towed arrays which may have their measurement variances improved when all possible sensor-pair measurements and a priori knowledge of range are taken into account. Improvement factors are defined and plotted versus signal-to-noise ratio and versus number of sensors in the arrays. Clustered versus equally spaced sensors is another aspect in... View full abstract»

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  • Quadrature mirror filter design for an arbitrary number of equal bandwidth channels

    Publication Year: 1985, Page(s):203 - 218
    Cited by:  Papers (114)  |  Patents (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1184 KB)

    The two-channel quadrature mirror filter structure of Croisier and Esteban may be extended to an arbitrary number of equal bandwidth channels, given certain restrictions on the bandpass filters. The most serious restriction is that the stopband attenuation of eacli band-pass filter must be high for all frequencies outside twice the nominal 3 dB bandwidth of the filter. This restriction is not real... View full abstract»

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  • A fast maximum likelihood algorithm for frequency estimation of a sinusoid based on Newton's method

    Publication Year: 1985, Page(s):77 - 89
    Cited by:  Papers (76)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (800 KB)

    A fast algorithm to estimate the frequency of a sinusoid is presented here. It is based on Newton's method for finding the root of an equation, and it is shown that under easily met conditions, the root mean-square error (RMSE) of the estimator is practically equal to the Cramer-Rao bound after only two iterations of Newton's method for all signal-to-noise ratios (SNR's) above threshold. The estim... View full abstract»

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  • A new generalized cross correlator

    Publication Year: 1985, Page(s):38 - 45
    Cited by:  Papers (26)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (832 KB)

    A new generalized cross correlator (GCC) for the passive time delay estimation problem is presented. The interpretation of this GCC is that of estimating the cross-correlation function by cross correlating the least mean-square estimates of the signal component in each of the observed waveforms. The implementation is simply a GCC with the weighting filter equal to the magnitude coherency squared. ... View full abstract»

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  • Estimates for the stability of low-pass filters

    Publication Year: 1985, Page(s):98 - 105
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (656 KB)

    A measure of stability is defined for digital filters. It is shown that the stability of low-pass filters goes to zero as the filter characteristics approach that of an ideal low-pass filter. More precisely, estimates for the rate of convergence are given. It is shown that, except for constants, the stability of a low-pass filter is no greater than the square root of the reciprocal of the logarith... View full abstract»

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  • Co-occurrence analysis of speech waveforms

    Publication Year: 1985, Page(s):5 - 30
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1880 KB)

    The co-occurrence matrix, a two-dimensional histogram of pairs of sample amplitudes, is explored as a representation of the digital speech waveform. Co-occurrence matrix representations support a hypothesis-testing approach to digital speech analysis. This approach is pursued in the formulation of a quantitative (chi-square) measure of sample amplitude dependence, based on co-occurrence matrices. ... View full abstract»

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  • Frequency estimation based on iterated autocorrelation function

    Publication Year: 1985, Page(s):70 - 76
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (824 KB)

    An exclusive time-domain solution has been suggested for estimating the frequency of a single-frequency sinusoid embedded in broad-band noise. The coherent component, viz. the sinusoid is enhanced by repeated or iterated autocorrelation. It is shown that substantial savings in computation can be obtained by coarse quantization of the sequences and then performing the autocorrelations, and that thi... View full abstract»

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  • The application of the frequency domain LMS adaptive filter to split array bearing estimation with a sinusoidal signal

    Publication Year: 1985, Page(s):61 - 69
    Cited by:  Papers (4)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (824 KB)

    This paper considers the use of the frequency domain LMS adaptive filter in a split array sonar to estimate the bearing of a plane wave acoustic source radiating a sinusoidal signal. For such a signal, the bearing can be determined from the relative signal phase between split array outputs at the signal frequency. In this paper, the split array outputs are fast Fourier transformed and used as the ... View full abstract»

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  • Root properties and convergence rates of median filters

    Publication Year: 1985, Page(s):230 - 240
    Cited by:  Papers (70)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1120 KB)

    Median filters are a special class of ranked order filters used for smoothing signals. Repeated application of the filter on a quantized signal of finite length ultimately results in a sequence, termed a root signal, which is invariant to additional passes of the median filter. In this paper, the theory is developed both for determining the cardinality of the root signal space of arbitrary window ... View full abstract»

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  • Optimum detection performance of passive coherence estimators

    Publication Year: 1985, Page(s):240 - 248
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1080 KB)

    Two-dimensional coherence processing is commonly used for passive detection in acoustic sensor systems. Modern coherence processors well suited for this purpose include the magnitude-squared coherence (MSC) estimator and the normalized correlation envelope (NCE) estimator. These are biased estimators whose performance characteristics are not well understood and are exceptionally difficult to analy... View full abstract»

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  • Variance and bias of the normalized relay correlation estimator

    Publication Year: 1985, Page(s):334 - 336
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (392 KB)

    In a recent paper, Gabriel states that no simple or enlightening expression exists for the variance and bias of the normalized relay correlation estimator for independent pairs of Gaussian samples. In this note, approximate expressions for this variance and bias are derived which are both simple and agree with the empirical variances measured by Gabriel. View full abstract»

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  • A class of low-noise computationally efficient recursive digital filters with applications to sampling rate alterations

    Publication Year: 1985, Page(s):90 - 97
    Cited by:  Papers (73)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (776 KB)

    A new structure for multiband recursive digital filters is proposed. For meeting low-pass filter specifications, it uses fewer multiplications than conventional elliptic filter realizations. An approximation to the minimax solution is obtained numerically by minimizing the LP error norm. The analytic optimum for odd order low-pass filters of this new class turns out to be the elliptic filter itsel... View full abstract»

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  • ARMA spectral estimation for noisy signals observed through a linear system

    Publication Year: 1985, Page(s):160 - 163
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (440 KB)

    Spectral estimation for autoregressive moving-average (ARMA) processes observed through a known linear system is considered. An algorithm based on a system identification/parameter estimation technique known as the recursive prediction error method is used for spectral estimation. The algorithm is formulated in the state space to incorporate the constraints imposed by the linear system. The linear... View full abstract»

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  • One-dimensional processing for adaptive image restoration

    Publication Year: 1985, Page(s):117 - 126
    Cited by:  Papers (34)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1824 KB)

    A one-dimensional (1-D) approach to the problem of adaptive image restoration is presented. In this approach, we use a cascade of four 1-D adaptive filters oriented in the four major correlation directions of the image, with each filter treating the image as a 1-D signal. The objective of developing restoration techniques using this approach is to improve the performance of two-dimensional (2-D) t... View full abstract»

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  • Kaiser-Bessel weighting of the Hilbert transform high-cut filter

    Publication Year: 1985, Page(s):329 - 331
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB)

    This correspondence presents two empirical equations that assist in the accurate design of Hilbert transform high-cut filters. These equations allow the formulation of time-variant filters that meet a priori specifications for attenuation and rolloff interval. View full abstract»

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  • Time correlation statistics of the LMS adaptive algorithm weights

    Publication Year: 1985, Page(s):309 - 312
    Cited by:  Papers (12)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (488 KB)

    The transient and steady-state weight correlation statistics of both the real and complex LMS adaptive filters are obtained when the inputs are independent samples from real and circularly Gaussian processes, respectively. A matrix relationship is derived between the covariance matrix of the weight vector at two different times and the covariance matrix of the weights at one time. These expression... 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