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IEEE Transactions on Acoustics, Speech, and Signal Processing

Issue 3 • 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
  • Two-dimensional spectral estimation

    Publication Year: 1981, Page(s):396 - 401
    Cited by:  Papers (50)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (709 KB)

    In this paper, effective methods for generating two-dimensional quarter-plane causal autoregressive (AR) and autoregressive moving average (ARMA) spectral estimation models are developed. These procedures are found to provide super resolution capabilities when compared to other more classical methods such as the Fourier transform. The ARMA method involves manipulation of the model equationsum... View full abstract»

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  • 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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  • Time delay estimation in a sensor array

    Publication Year: 1981, Page(s):519 - 523
    Cited by:  Papers (29)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (620 KB)

    The estimation of time delays between elements in an array of M point sensors located in a discrete multipath propagation medium is considered. It is shown that, in fact, time delays are not estimated directly. Rather, a location vectorunderline{Theta}which parameterizes the relative source-receiving array geometry is estimated. In general, the relative sensor-to-sensor time delays are ... View full abstract»

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  • An overview on the time delay estimate in active and passive systems for target localization

    Publication Year: 1981, Page(s):527 - 533
    Cited by:  Papers (198)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (743 KB)

    Sonar and radar systems not only detect targets but also localize them. The process of localization involves bearing and range estimation. These objectives of bearing and range estimation can be accomplished actively or passively, depending on the situation. In active sonar or radar systems, a pulsed signal is transmitted to the target and the echo is received at the receiver. The range of the tar... 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
  • 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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  • 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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  • 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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  • A new algorithm for two-dimensional maximum entropy power spectrum estimation

    Publication Year: 1981, Page(s):401 - 413
    Cited by:  Papers (71)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1184 KB)

    A new iterative algorithm for the maximum entropy power spectrum estimation is presented in this paper. The algorithm, which is applicable to two-dimensional signals as well as one-dimensional signals, utilizes the computational efficiency of the fast Fourier transform (FFT) algorithm and has been empirically observed to solve the maximum entropy power spectrum estimation problem. Examples are sho... View full abstract»

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  • Polyphase filter banks using wave digital filters

    Publication Year: 1981, Page(s):423 - 428
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (640 KB)

    The branch filters in a digital polyphase network can be designed either as FIR filters by decomposing the impulse response of an FIR low-pass prototype filter, or as ordinary IIR filters by the synthesis method of Bellanger. The use of all-pass networks has hitherto been considered unfeasible because of the associated computational difficulties involved in the design of filter banks with many bra... 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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  • Relations between 2-D and multichannel linear prediction

    Publication Year: 1981, Page(s):454 - 456
    Cited by:  Papers (34)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (416 KB)

    A procedure for solving 2-D normal equations is derived by relating the 2-D linear prediction problem to a multichannel linear prediction problem and applying the multichannel Levinson recursion. View full abstract»

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  • The use of phase difference trace functions for bearing estimation with small circular arrays

    Publication Year: 1981, Page(s):501 - 507
    Cited by:  Papers (2)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (744 KB)

    A geometric interpretation of the space-time data from an array of elements called the "trace function" by the authors is used to form an estimate of the bearing of a plane wave sinusoidal signal impinging upon a circular array of small diameter compared to a wavelength. A minimum mean-square error (MMSE) bearing estimator is derived using phase differences between pairs of elements. An estimator ... View full abstract»

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  • Switched-capacitor building blocks for adaptive systems

    Publication Year: 1981, Page(s):736 - 744
    Cited by:  Papers (7)  |  Patents (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1176 KB)

    A number of switched-capacitor (SC) building blocks useful in adaptive systems are presented. These include a phase-lock loop, a tracking filter, a second-order equalizer with programmable gain, zeros' frequency and zeros' Q factor, a quadrature sine-wave generator, and a synchronous demodulator. It is shown, how a number of these signal processing blocks can be combined together to produce an ada... View full abstract»

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  • Time-scale modification of speech based on short-time Fourier analysis

    Publication Year: 1981, Page(s):374 - 390
    Cited by:  Papers (80)  |  Patents (25)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1696 KB)

    This paper develops the theoretical basis for time-scale modification of speech based on short-time Fourier analysis. The goal is the development of a high-quality system for changing the apparent rate of articulation of recorded speech, while at the same time preserving such qualities as naturalness, intelligibility, and speaker-dependent features. The results of the theoretical study were used a... View full abstract»

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  • A new class of orthonormal transforms

    Publication Year: 1981, Page(s):452 - 454
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (392 KB)

    A new technique of obtaining a complete orthonormal transform based on a particular interpretation of DFT is developed. One such transform, namely, the Fourier-twiddled H-DF transform, has been discussed in detail. The permutation properties of such transforms can be deduced from the knowledge of the permutation properties of the two component transforms. 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 (48)  |  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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  • Time delay estimation using phase data

    Publication Year: 1981, Page(s):471 - 477
    Cited by:  Papers (122)  |  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (736 KB)

    The estimation of time delays between two received signals using phase measurements is discussed and the accuracy of such estimates is detailed. For the ideal case of statistically independent noise and no scattering at the receiver locations, it is shown that phase data regression lines yield time delay estimates with the same accuracy as other optimal time delay estimation procedures. For less i... View full abstract»

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  • Error surfaces of recursive adaptive filters

    Publication Year: 1981, Page(s):763 - 766
    Cited by:  Papers (63)
    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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  • Analysis of discrete implementation of generalized cross correlator

    Publication Year: 1981, Page(s):609 - 611
    Cited by:  Papers (59)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB)

    A common discrete implementation of the cross correlator uses a parabolic fit to the peak when the delay is not an integral multiple of the sampling period. This correspondence analyzes and assesses the pitfalls of this approach. It is shown that this yields a biased estimate of the time delay, with both the bias and variance of the estimate dependent on the location of the delay between samples, ... 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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  • A note on some statistical aspects of "Speaker-independent recognition of isolated words using clustering techniques"

    Publication Year: 1981, Page(s):449 - 450
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (208 KB)

    First Page of the Article
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  • Signal delay and waveform estimation using unwrapped phase averaging

    Publication Year: 1981, Page(s):508 - 513
    Cited by:  Papers (32)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (600 KB)

    Detection and estimation under poor signal-to-noise conditions may require the averaging of an ensemble of time-locked measurements. However, when there is a variation in signal delay, it is necessary to adjust the alignment of the measurements in order for averaging to produce an undistorted estimate of the signal waveform. We describe a technique where alignment is, in effect, replaced by averag... 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