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IEEE Transactions on Circuits and Systems

Issue 5 • Date May 1988

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Displaying Results 1 - 22 of 22
  • Comments on "Author's reply on the 2-D unit noise matrix" by T. Hinamoto, et al.; and T. Lin, et al

    Publication Year: 1988, Page(s):611 - 612
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (143 KB)

    The commenters maintain the correctness of the 2-D noise matrix formulas presented in a previous work (ibid., vol.CAS-33, p.965-73, Oct. 1986) citing the first above-named work by T. Hinamoto et al. (ibid., vol.35, p.609-10, May 1988) against the objects raised by T. Lin and M. Kawamata in the second above named work (ibid., vol.35, p.610-11, May 1988). The commenters argue that Lin and Kawamata u... View full abstract»

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  • Hilbert transform and gain/phase error bounds for rational functions

    Publication Year: 1988, Page(s):528 - 535
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (604 KB)

    It is well known that a function analytic in the right-half plane can be constructed from its real part alone, or (modulo an additive constant) from its imaginary part alone via the Hilbert transform. It is also known that a stable phase-transfer function can be reconstructed from its gain alone, or (modulo a multiplicative constant) from its phase alone, using the Bode gain/phase relations. The q... View full abstract»

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  • Analysis of logarithmic number system processors

    Publication Year: 1988, Page(s):519 - 527
    Cited by:  Papers (9)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (552 KB)

    An analysis of a logarithmic number system (LNS) processor is presented. The analysis includes processor designs that overcome the historical limitation of the word-length of LNS, thus increasing the precision of the processor. A 20-bit LNS VLSI chip layout and timing estimates have been produced in cooperation with Honeywell Inc. Using an enhanced 1.25-ns technology, and inserting pipelining regi... View full abstract»

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  • Attenuation characteristics of three-dimensional planar-resonant recursive digital filters

    Publication Year: 1988, Page(s):595 - 599
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB)

    First-order planar-resonant 3-D recursive digital filters may be used to selectively enhance dynamic (i.e. time-varying) input signals that move in a straight line with approximately uniform speed in a 2-D image. An efficient method for determining the attenuation of such dynamic 2-D signals is described. It is shown that it is possible to use geometrical considerations to calculate the attenuatio... View full abstract»

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  • A new class of functions for transient analysis of coaxial cables terminated with parallel resistor and capacitor

    Publication Year: 1988, Page(s):512 - 518
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (424 KB)

    A class of Laplace transforms particularly well suited for transient analysis of capacitively-loaded coaxial cables with skin effect loss is considered. Algorithms for time-domain calculations are derived and some computed time responses are compared with experimental results. An advantage of a method based on an expansion of the time response in a series of functions Gn... View full abstract»

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  • Zero-state accessibility and stability of optimal coupled-form digital filters with rounding

    Publication Year: 1988, Page(s):590 - 594
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (404 KB)

    The symmetry properties and the zero-state accessibility conditions for second-order fixed-point coupled-form digital filters with two or four roundoff quantizers are derived. The stability regions for different values of the asymmetry parameter k are determined and compared with those for the normal coupled form (k =1) and for the direct form View full abstract»

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  • On the robustness of low-order Schur polynomials

    Publication Year: 1988, Page(s):570 - 577
    Cited by:  Papers (30)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (640 KB)

    Robust Schur stability conditions are obtained for polynomials of orders two to five. For n=2 and 3, the conditions obtained are related to stability of the corner points, while for n=4 and 5, the conditions are related to stability of corner and possible supplementary points. The number of points increases substantially as the polynomial order increases. The obtained results are... View full abstract»

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  • The two-dimensional adaptive LMS (TDLMS) algorithm

    Publication Year: 1988, Page(s):485 - 494
    Cited by:  Papers (185)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (840 KB)

    A two-dimensional least-mean-square (TDLMS) adaptive algorithm based on the method of steepest decent is proposed and applied to noise reduction in images. The adaptive property of the TDLMS algorithm enables the filter to have an improved tracking performance in nonstationary images. The results presented show that the TDLMS algorithm can be used successfully to reduce noise in images. The algori... View full abstract»

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  • Relationship between input-scaling and stability of the forced response of recursive digital filters

    Publication Year: 1988, Page(s):506 - 511
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (452 KB)

    The stability of forced response of a general recursive digital filter operating in the inherent presence of overflow nonlinearities is examined. A theorem is derived that relates forced-response stability to the degree of input-scaling. The technique is applied to the investigation of the stability properties of state-space digital filters, resulting in a criterion for the forced-input stability ... View full abstract»

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  • Relationship between two forms in the 2-D unit noise matrix

    Publication Year: 1988, Page(s):609 - 610
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (124 KB)

    Two forms defining the 2-D unit noise matrix proposed by W.-S. Lu and A. Antonious (ibid., vol.CAS-33, p.965-73 Oct., 1986) are investigated using R.P. Roesser's (1975) local state-space model, and their relationship is clarified. It is shown that although these forms are not identical they are compatible in the optimal 2-D digital filter synthesis View full abstract»

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  • 2-D filter implementations for real-time signal processing

    Publication Year: 1988, Page(s):587 - 590
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (292 KB)

    It is shown that the fast 2-D filter for real-time image processing derived by K.M. Ty and A.N. Venetsanopoules (ibid., vol.CAS-33, p.948-57, 1986) using Horner's rule can also be obtained as a slight modification of 2-D direct form I implementation. The 2-D transposed direct form II structure is shown to be as fast and results in about a 50% savings in cost View full abstract»

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  • A simple design of FIR filters with powers-of-two coefficients

    Publication Year: 1988, Page(s):566 - 570
    Cited by:  Papers (117)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (444 KB)

    A design algorithm for finite-impulse response (FIR) filters with powers-of-two coefficients (2PFIR filters) is presented. The algorithm enables the design of 2PFIR filters with sharp cutoff. The 2PFIR filters are attractive for high-speed operation and simplification of hardware. However, the optimal or suboptimal design of 2PFIR filters with sharp cutoff have been difficult in the minimax sense.... View full abstract»

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  • Integral representations for linear maps

    Publication Year: 1988, Page(s):536 - 544
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (564 KB)

    Representation theorems for linear causal input-output maps that take certain bounded R-valued functions on (0, ∞) into not necessarily-bounded functions on the same time interval are presented. In particular, an identification is made between an important class of maps and a set of functions of bounded variations on compact subsets of [0, ∞). These functions have the interpre... View full abstract»

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  • Adaptive identification of systems with polynomial parameterizations

    Publication Year: 1988, Page(s):599 - 603
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (372 KB)

    Two uniformly asymptotically convergent algorithms for the on-line identification of systems with a polynomial dependence on unknown parameters are described. Such parameterizations occur when a wide class of physical components of the system are the unknown parameters View full abstract»

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  • Computable minimum lattice-like ARMA synthesis

    Publication Year: 1988, Page(s):577 - 583
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (560 KB)

    A cascade synthesis for autoregressive moving-average (ARMA) digital filters, which uses the minimum number of delay elements (the degree of the transfer function in z), is described. The resulting structure results in the very convenient lattice from when the zeros of the transmission are not on the unit circle. The theory rests on conversion to scattering parameters and the use of a Ric... View full abstract»

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  • A VLSI signal processor with complex arithmetic capability

    Publication Year: 1988, Page(s):495 - 505
    Cited by:  Papers (10)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (856 KB)

    The PSI, a programmable digital signal processor that includes the full complex computation mode, is presented. A complex parallel multiplier is derived from a real multiplier by adding pipeline stages. The pipeline introduced in the arithmetic unit fits the parallel nature of complex multiplications that require four real multiplications simultaneously. The internal architecture is optimized for ... View full abstract»

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  • A note on the 2-D noise matrix of 2-D state-space digital filters

    Publication Year: 1988, Page(s):610 - 611
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (144 KB)

    It is argued that the derivation of the formulas to compute the output noise and the 2-D noise matrix given by W.-S. Lu and A. Antoniou (ibid., vol.CAS-33, p.965-73, Oct. 1986) is incorrect. Moreover, the formula for the 2-D noise matrix obtained does not have the dual form to the formula for the 2-D covariance matrix View full abstract»

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  • A model-based 3-D vision system for bin-picking

    Publication Year: 1988, Page(s):545 - 553
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (864 KB)

    A vision system to recognize 3-D objects in a scene and to evaluate their attitude is presented. This system uses a model-based approach to determine the attitude of 3-D industrial parts in the context of bin packing. It is based on the matching of the extended Gaussian image (EGI) extracted from the surface normal map (needle map) of an observed object with the EGI generated from a 3-D model usin... View full abstract»

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  • MVSE adaptive filtering subject to a constraint on MSE

    Publication Year: 1988, Page(s):603 - 608
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (456 KB)

    An adaptive filtering algorithm that minimizes the variance on the squared error subject to a constraint on the mean-squared error (MSE) is proposed. For the adaptive-linear-combiner signal-processing configuration, this algorithm, called the LVCMS algorithm (for least variance subject to a constraint on mean squared error) has a gradient that is a weighted linear combination of the least-mean-squ... View full abstract»

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  • Inversion of singular systems

    Publication Year: 1988, Page(s):583 - 587
    Cited by:  Papers (20)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (404 KB)

    A method for inverting square singular systems is presented. The construction explores the possibility of singular-system representation, and provides a simple and closed form for the constructed inverse. One important property is that the minimality of the inverse (in the sense of Verghese) is equivalent to that of the original system View full abstract»

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  • Neural networks for nonlinear programming

    Publication Year: 1988, Page(s):554 - 562
    Cited by:  Papers (645)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (680 KB)

    The dynamics of the modified canonical nonlinear programming circuit are studied and how to guarantee the stability of the network's solution. By considering the total cocontent function, the solution of the canonical nonlinear programming circuit is reconciled with the problem being modeled. In addition, it is shown how the circuit can be realized using a neural network, thereby extending the res... View full abstract»

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  • Nonlinear dynamic maximum power theorem

    Publication Year: 1988, Page(s):563 - 566
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (336 KB)

    The problem of maximizing the energy or average power transfer from a nonlinear dynamic source is considered. The main theorem includes, as special cases, the standard linear result where the load admittance equals the complex conjugate of the source admittance and a recent finding for linear resistive networks. An operator equation for the optimal output voltage is derived, and a numerical method... View full abstract»

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