IEEE Transactions on Acoustics, Speech, and Signal Processing

Issue 5 • October 1986

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Displaying Results 1 - 25 of 46
  • [Front cover and table of contents]

    Publication Year: 1986, Page(s): 0
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    Freely Available from IEEE
  • Comments on "A general method of minimum cross-entropy spectral estimation"

    Publication Year: 1986, Page(s):1324 - 1326
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (284 KB)

    In a recent correspondence Tzannes et al. [1] introduced a new form of minimum cross-entropy (MCE) spectral analysis based on the observation that normalized spectra and symmetric probability density functions (pdf's) are axiomatically indistinguishable. Thus, the form of the minimum cross-entropy posterior pdf can be used as a model for spectral estimation. In this correspondence we derive the sa... View full abstract»

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  • Corrections to "Results on nonrecursive digital filters with nonequidistant taps"

    Publication Year: 1986, Page(s): 1336
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (140 KB)

    First Page of the Article
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  • An explanation to the limitation observed in the Kumaresan-Prony algorithm

    Publication Year: 1986, Page(s):1338 - 1340
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (319 KB)

    In this correspondence we explain the limitation of the Kumaresan-Prony algorithm observed in [2]. It is shown that the condition number of the matrix involved with the associated least-squares problem periodically degrades (condition number rightarrow infin) making the least-squares solution ill conditioned. This ill conditioning causes a degradation in the estimates obtained by the Ku... View full abstract»

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  • Radar data processing: Vol. I - Introduction and tracking

    Publication Year: 1986, Page(s):1350 - 1351
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (221 KB)

    First Page of the Article
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  • [Back cover]

    Publication Year: 1986, Page(s): c4
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    Freely Available from IEEE
  • Analysis/Synthesis filter bank design based on time domain aliasing cancellation

    Publication Year: 1986, Page(s):1153 - 1161
    Cited by:  Papers (240)  |  Patents (133)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (832 KB)

    A single-sideband analysis/synthesis system is proposed which provides perfect reconstruction of a signal from a set of critically sampled analysis signals. The technique is developed in terms of a weighted overlap-add method of analysis/synthesis and allows overlap between adjacent time windows. This implies that time domain aliasing is introduced in the analysis; however, this aliasing is cancel... View full abstract»

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  • Unbiased parameter estimation of nonstationary signals in noise

    Publication Year: 1986, Page(s):1319 - 1322
    Cited by:  Papers (20)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (400 KB)

    Recent approaches to the modeling of nonstationary signals by means of AR or ARMA models use a representation with time-varying parameters. The time-varying parameters are assumed to be linear combinations of a set of basis time functions so that the model is specified by constant parameters. For stationary signals disturbed by white noise, an approach based upon a modified least-squares method le... View full abstract»

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  • Multichannel AR spectrum estimation: The optimum approach in the reflection coefficient domain

    Publication Year: 1986, Page(s):1139 - 1152
    Cited by:  Papers (18)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1016 KB)

    A new approach for multichannel autoregressive (AR) spectrum estimation is introduced based on an iterative gradient algorithm. In the context of dynamic programming, the approach is shown to be optimum in the reflection coefficient domain, whereas the multichannel AR Nuttall-Strand algorithm is shown to be suboptimum. The approach guarantees a stable multichannel AR filter and a nonnegative spect... View full abstract»

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  • A ring array processor architecture for highly parallel dynamic time warping

    Publication Year: 1986, Page(s):1310 - 1318
    Cited by:  Papers (6)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1032 KB)

    A ring array architecture is studied on a hardware algorithm and a control scheme for dynamic time warping (DTW) processing, in order to achieve real-time speech recognition. For developing a practical DTW processor, the key factors are to reduce the number of processing elements (PE's) in the array architecture and to maintain highly efficient concurrency and high throughput. Regular data and con... View full abstract»

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  • Adaptive comb filtering for harmonic signal enhancement

    Publication Year: 1986, Page(s):1124 - 1138
    Cited by:  Papers (180)  |  Patents (61)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1224 KB)

    A new algorithm is presented for adaptive comb filtering and parametric spectral estimation of harmonic signals with additive white noise. The algorithm is composed of two cascaded parts. The first estimates the fundamental frequency and enhances the harmonic component in the input, and the second estimates the harmonic amplitudes and phases. Performance analysis provides new results for the asymp... View full abstract»

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  • A multimicroprocessor architecture for real-time computation of a class of DFT algorithms

    Publication Year: 1986, Page(s):1301 - 1309
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1152 KB)

    The design of a multimicroprocessor system intended for a class of real-time processing applications is discussed. The applications considered require the computation of a subset of an N-input Fourier transform under the assumption of a serial data input. The suitability of two different algorithms and the corresponding parallel architectures is analyzed and compared. More specifically, we compare... View full abstract»

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  • Nonlinear space-variant postprocessing of block coded images

    Publication Year: 1986, Page(s):1258 - 1268
    Cited by:  Papers (192)  |  Patents (30)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (2256 KB)

    An important application of spatial filtering techniques is in the postprocessing of images degraded by coding. Linear, space-invariant filters are inadequate to reduce the noise produced by block coders. The noise in block coded images is correlated with the local characteristics of the signal, and such filters are unable to exploit this correlation to reduce the noise. We propose a new nonlinear... View full abstract»

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  • An analysis of the distributed arithmetic digital filter

    Publication Year: 1986, Page(s):1165 - 1170
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (496 KB)

    Distributed arithmetic filters have been shown to be an effective method of implementing linear shift-invariant filters. In this paper, the overall roundoff error budgets of admissible distributed arithmetic filter structures are compared to conventional lumped parameter and to each other. In addition, dynamic range considerations are also introduced into the study. View full abstract»

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  • Measurement of spectral correlation

    Publication Year: 1986, Page(s):1111 - 1123
    Cited by:  Papers (157)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1296 KB)

    Various methods for measurement/computation of spectral correlation functions for time series that exhibit cyclostationarity are described in a unifying theoretical framework. Some of these are amenable to digital hardware or software implementations, others are amenable to analog electrical or optical implementations, and other implementation types used for conventional spectral analysis are also... View full abstract»

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  • On residue number system decoding

    Publication Year: 1986, Page(s):1346 - 1347
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (248 KB)

    The use of a residue number system (RNS) in digital systems and especially filter designs is facilitated by efficient algorithms for the conversion from RNS to binary numbers. The conversion is generally based on the Chinese remainder theorem or the mixed radix conversion. This correspondence describes another conversion algorithm which employs the direct pairwise solution of the Diophantine equat... View full abstract»

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  • Exact maximum likelihood parameter estimation of superimposed exponential signals in noise

    Publication Year: 1986, Page(s):1081 - 1089
    Cited by:  Papers (479)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1104 KB)

    A unified framework for the exact maximum likelihood estimation of the parameters of superimposed exponential signals in noise, encompassing both the time series and the array problems, is presented. An exact expression for the ML criterion is derived in terms of the linear prediction polynomial of the signal, and an iterative algorithm for the maximization of this criterion is presented. The algo... View full abstract»

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  • A complex adaptive algorithm for IIR filtering

    Publication Year: 1986, Page(s):1342 - 1344
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (312 KB)

    This correspondence generalizes the Gauss-Newton algorithm [1] for adaptive IIR filters to include complex coefficients. The resulting algorithm simultaneously updates the real and imaginary parts of the filter coefficients to minimize the average squared estimation error. It has application in frequency-domain adaptive IIR filtering [2] where the signals and filter coefficients are complex. View full abstract»

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  • A high-quality digital filterbank for speech recognition which runs in real time on a standard microprocessor

    Publication Year: 1986, Page(s):1064 - 1073
    Cited by:  Papers (4)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1336 KB)

    Asynchronous digital filterbank or LPC output is widely used for high-quality research and commercial speech recognition applications. Special-purpose hardware is usually applied. In this paper, a decimation/DFT filterbank system is described which may be implemented in real time on a standard microprocessor. Key features of the approach are a dithering technique, which allows output sampling at a... View full abstract»

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  • A modification of the Kumaresan-Tufts methods for estimating rational impulse responses

    Publication Year: 1986, Page(s):1336 - 1338
    Cited by:  Papers (25)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (376 KB)

    This correspondence presents a modification of the Kumaresan-Tufts algorithm for estimating the parameters of rational impulse responses in additive white noise. The modified algorithm uses the forward and backward predictors to select the signal poles, and then combines the two sets of poles to form the final estimates. The modified algorithm exhibits an improved robustness and a smaller bias in ... View full abstract»

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  • The design of uniformly and nonuniformly spaced pseudoquadrature mirror filters

    Publication Year: 1986, Page(s):1090 - 1096
    Cited by:  Papers (105)  |  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (728 KB)

    In the past, quadrature mirror filters (QMF's) have been used to derive both uniformly and nonuniformly spaced filterbanks. A pair of QMF's divides a signal into two equal bands which can be decimated at 2:1 and subsequently combined to reconstruct the original signal. In order to derive filterbanks with more than two bands, QMF's are combined in a binary tree structure. Pseudoquadrature mirror fi... View full abstract»

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  • Optimization of one-bit full adders embedded in regular structures

    Publication Year: 1986, Page(s):1289 - 1300
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1136 KB)

    We study the problem of optimizing the transistor sizes in the one-bit nMOS full adder either isolated or embedded in a regular array. A local optimization method that we call the critical-path optimization method is developed. In this method, two parameters at a time are changed along the critical path until a locally optimal choice of transistor sizes is found. The critical-path optimization met... View full abstract»

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  • Detection of wave reflectors and wave sources in the earth subsurface

    Publication Year: 1986, Page(s):1245 - 1257
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (1088 KB)

    Event detection is a very important task in geophysics. It encompasses the detection of wave sources (earthquakes, subsurface explosions) and the detection of wave reflectors (interfaces between rock layers having different velocities and/or different densities). The latter application is very important in seismic oil prospecting. Seismic events release energy which propagates toward the earth sur... View full abstract»

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  • Some new aspects of filters for filter banks

    Publication Year: 1986, Page(s):1182 - 1200
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (976 KB)

    The present paper deals with the design of filters for use in filter banks, i.e., with certain constraints on their transition bands. The goal is to achieve a baseband frequency response of a back-to-back analysis/synthesis filter bank system that is ideally flat in magnitude and linear in phase. Using the proposed method, this is possible for conventional polyphase filter banks, single-sideband (... View full abstract»

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  • A new scheme for designing IIR filters with finite wordlength coefficients

    Publication Year: 1986, Page(s):1335 - 1336
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (280 KB)

    A scheme for designing IIR digital filters, with specified coefficient wordlengths based on successive digitization and reoptimization, is presented and compared to related approaches via a number of design examples. The ordered digitization of the coefficients based on their sensitivity, with each digitization followed by reoptimization of the remaining coefficients, results in a much reduced com... 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