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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 (3)
    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
  • A Bayesian approach to time delay estimation

    Publication Year: 1981, Page(s):611 - 614
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (392 KB)

    Estimation of time delay between two sensors or estimation of multipath delay at single sensor is carried out by calculating the a posteriori pdf of the time delay from a given prior distribution. When the time delay is fixed over the observation interval, the a posteriori pdf is obtained from a fixed set of Kalman filters, each of which is matched to a different delay. When the time delay is Mark... 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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  • 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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  • 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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  • A distributed-µ implementation of the LMS algorithm

    Publication Year: 1981, Page(s):753 - 762
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (920 KB)

    This paper describes the effects of component nonidealities upon the performance of analog and sampled data adaptive noise cancellers. It is shown that the effects of analog implementation differ significantly from those encountered in ideal cases or those in which the added circuit noise is assumed to have a zero-mean distribution. It is also shown that the effects of nonzero mean errors, such as... 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 (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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  • 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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  • 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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  • 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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  • Adaptive estimation of time delays in sampled data systems

    Publication Year: 1981, Page(s):582 - 587
    Cited by:  Papers (104)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (560 KB)

    An adaptive technique is developed which iteratively determines the time delay between two sampled signals that are highly correlated. Although the procedure does not require a priori information on the input signals, it does require that the signals have a unimodal or periodically unimodal cross-correlation function. The adaptive delay algorithm uses a gradient technique to find the value of the ... View full abstract»

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  • Comparison of the convergence of two algorithms for adaptive FIR digital filters

    Publication Year: 1981, Page(s):670 - 678
    Cited by:  Papers (92)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (944 KB)

    The convergence properties of two different algorithms for the updating of the coefficients of an adaptive FIR digital filter are investigated and compared with one another. These algorithms are the stochastic iteration algorithm and the sign algorithm. In this latter algorithm a one-bit gradient estimation is used which makes its implementation very simple. The convergence is characterized by the... View full abstract»

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  • Error analysis of time delay estimation using a finite integration time correlator

    Publication Year: 1981, Page(s):490 - 496
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (704 KB)

    A methodology is presented for analyzing the error associated with time delay estimation using a finite integration time correlator, processing waveforms received at two separate sensors. The type of signal considered is a sinusoid whose amplitude is randomly modulated. The signals are assumed to be imbedded in additive Gaussian noise. Before they are correlated, the received waveforms are convert... 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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  • Improvement of delay measurements from sonar arrays via sequential state estimation

    Publication Year: 1981, Page(s):514 - 519
    Cited by:  Papers (9)
    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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  • Recursive least squares ladder estimation algorithms

    Publication Year: 1981, Page(s):627 - 641
    Cited by:  Papers (236)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1624 KB)

    Recursive least squares ladder estimation algorithms have attracted much attention recently because of their excellent convergence behavior and fast parameter tracking capability, compared to gradient based algorithms. We present some recently developed square root normalized exact least squares ladder form algorithms that have fewer storage requirements, and lower computational requirements than ... 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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  • 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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Aims & Scope

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

Full Aims & Scope