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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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  • 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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  • Adaptive filtering prediction and control [Book Reviews]

    Publication Year: 1985, Page(s):337 - 338
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  • 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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  • The least squares estimation of time delay between two signals with unknown relative phase shift

    Publication Year: 1985, Page(s):308 - 309
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (248 KB)

    This correspondence addresses the problem of time delay estimation between two signals with an unknown constant relative phase shift. The method of time delay estimation for the pure delay case of Chan et al. [1] is applied here to derive the least squares estimator (LSE). An explicit expression for the LSE of the delay is obtained which is computationally less complex than the maximum likelihood ... View full abstract»

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  • The radon transforms and some of its applications

    Publication Year: 1985, Page(s):338 - 339
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (240 KB)

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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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  • Short-time Fourier transform using a bank of low-pass filters

    Publication Year: 1985, Page(s):182 - 185
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (440 KB)

    The purpose of this paper is to present some experimental results estimating instantaneous frequencies of FM (frequency modulation) signals using the short-time Fourier transform (STFT) method. The relevant STFT coefficients were computed using a bank of simple one-pole low-pass filters which estimates the cross correlation of a given signal and complex sinusoids. Also, it is shown that computing ... 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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  • Signal restoration from data aliased in time

    Publication Year: 1985, Page(s):151 - 159
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (808 KB)

    This paper deals with the problem of signal restoration from data aliased in time. The signal, which is in general noncausal, is split into a causal and an anticausal part. The causal part and the time-reversed anticausal part are then modeled as impulse responses of rational pole-zero models. The parameters of these models are then estimated by solving sets of overdetermined equations. The choice... View full abstract»

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  • Circular harmonic analysis of PSF's corresponding to separable polar-coordinate frequency responses with emphasis on fan filtering

    Publication Year: 1985, Page(s):300 - 307
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (776 KB)

    A method based on radius-dependent angular Fourier coefficients (circular harmonics) is used to analyze the point spread function (PSF) of any 2-D filter whose frequency response is separable in the polar-coordinate variables. The approach relies on the ability to express the PSF as the angular cyclic convolution of two functions related to the angular and radial characteristics of the frequency r... View full abstract»

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  • Constrained signal restoration via iterated extended Kalman filtering

    Publication Year: 1985, Page(s):331 - 334
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (480 KB)

    The problem of estimating the input (signal restoration) to a known linear system (point spread function), given the noisy observations of the output, is considered. The input signal is assumed to satisfy certain known physical constraints such as positivity. It is proposed to incorporate the constraints by introducing a memoryless non-linearity in the system. A statistical approach is taken leadi... View full abstract»

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  • Ordered and partially ordered processing of multidimensional images

    Publication Year: 1985, Page(s):185 - 194
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (888 KB)

    Multidimensional images are often converted by scanning to a raster format. For real-time processing a causal property relative to the scan order is important. In other examples the multidimensional image is processed without scanning. In such cases a partially ordered causality property is of interest. The present paper gives a definitive study of the interrelationship between the several causali... View full abstract»

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  • Discrete-time distortion analysis of quantized sinusoids

    Publication Year: 1985, Page(s):323 - 326
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (432 KB)

    Results are presented for the harmonic distortion and intermodulation products associated with file quantization of two sinusoids, with and without noise present. For the case of one sinusoid strong and the other weak, it is demonstrated that the intermodulation distortion is not as large as the self-distortion of the quantized strong sinusoid alone. View full abstract»

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  • A new technique for the design of two-dimensional FIR and IIR filters

    Publication Year: 1985, Page(s):268 - 280
    Cited by:  Papers (28)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1208 KB)

    The design problem of two-dimensional digital filters is the subject of this paper. The problem is formulated for both FIR and IIR filters in such a way that the performance index is a convex function of the optimization vector. The design technique is based on Newton's method. Each iteration consists of N easily computed steps, where N is the number of parameters to be optimized. The coefficients... View full abstract»

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  • The use of multiple criterion optimization for frequency domain design of noncausal IIR filters

    Publication Year: 1985, Page(s):126 - 135
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (840 KB)

    Noncausal recursive filters have recently been proposed because of their increased efficiency versus linear phase FIR filters and causal IIR filters [2]. A general frequency domain design technique capable of exploiting the characteristics of noncausal filters is not yet available. This paper proposes the use of multiple criterion optimization for the frequency domain design of noncausal IIR filte... 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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  • 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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  • A method for cancelling interference from a constant envelope signal

    Publication Year: 1985, Page(s):316 - 319
    Cited by:  Papers (5)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (456 KB)

    A method for adaptively cancelling interference from a constant envelope target signal is presented. The method is useful, even when some of the interfering signals are also constant envelope. The adaptive algorithm distinguishes between target signal and interference on the basis of signal amplitude and envelope shape. The amplitude of the target signal must be approximately known or measurable. View full abstract»

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  • Fitting autoregressive models to EEG time series: An empirical comparison of estimates of the order

    Publication Year: 1985, Page(s):143 - 150
    Cited by:  Papers (19)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (920 KB)

    A parametrization of the spectral structure of time series data is of great interest in many fields of science such as eleetroencephalography (EEG). Autoregressive processes offer such a representation. The problem is to find a parsimonious representation which fits the data well. Three criteria for determining the order of autoregressive models are, therefore, compared. A simulation is done for s... View full abstract»

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  • Two-dimensional linear prediction models--part I: Spectral factorization and realization

    Publication Year: 1985, Page(s):280 - 299
    Cited by:  Papers (34)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1752 KB)

    In this paper we present several results for three different canonical forms of linear prediction on a plane. These filters have causal, semicausal, and noncausal prediction geometries. Starting from their properties we consider the problem of realization of these filters from a given power spectral density function (SDF). Since it is not possible in general to obtain rational spectral factors of ... 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