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Circuits and Systems, 1989., IEEE International Symposium on

Date 8-11 May 1989

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Displaying Results 1 - 25 of 548
  • A fast and flexible residue decoder based on the Chinese remainder theorem

    Publication Year: 1989, Page(s):200 - 203 vol.1
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (330 KB)

    An implementation of a fast and flexible residue decoder based on the Chinese remainder theorem (CRT) is proposed for decoding a set of residues to its equivalent representation in a weighted binary number system. This decoder is flexible, since the decoded data can be selected to be either unsigned magnitude of two's complement binary number. It is shown that this residue decoder is extremely fas... View full abstract»

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  • A new class of node-splitting problems and applications

    Publication Year: 1989, Page(s):309 - 312 vol.1
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (384 KB)

    A new class of node-splitting problems for graphs is introduced and studied. The goal of the splitting process is to minimize the number of node-splitting operations needed to transform a given input graph into a new graph that has a property (bipartite, planar, nonseparable, etc.) that the original graph does not have. It is shown that the node splitting problem is NP-complete when the property i... View full abstract»

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  • Power dissipation estimate by switch level simulation (CMOS circuits)

    Publication Year: 1989, Page(s):881 - 884 vol.2
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (289 KB)

    A method for calculating power dissipation of digital CMOS circuits is presented. The estimate is made during switch-level simulation and is thus based on the simulated activity in the circuit. Dissipation from dynamic switching, the short-circuit component, and static currents are considered. The average power dissipation is overestimated by as little as 5-10% compared to SPICE results, if X-stat... View full abstract»

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  • Convolution-backprojection image reconstruction for bistatic synthetic aperture radar

    Publication Year: 1989, Page(s):1512 - 1515 vol.3
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (389 KB)

    The algorithm presented accounts for the elliptical nature of the wavefronts over the ground patch (resulting in elliptical-arc projections) and is based on the convolution-backprojection (CBP) algorithm of computer tomography. Essentially, three changes were made to the CBP algorithm. First, instead of backprojection along straight lines, the backprojection is along the same elliptical arcs from ... View full abstract»

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  • The ST18940/41: an advanced single-chip digital signal processor

    Publication Year: 1989, Page(s):1559 - 1562 vol.3
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (354 KB)

    A description is given of the architecture, the internal resources and the performance of a second-generation, monolithic, programmable digital signal processor. The architecture and instruction set of the ST DSP family are designed to allow a straightforward expansion by adding new functions or improving the existing ones in parallel with advances in VLSI technology while ensuring upward software... View full abstract»

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  • Conjugate gradient techniques for adaptive filtering

    Publication Year: 1989, Page(s):1752 - 1757 vol.3
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (385 KB)

    The technique of conjugate gradients is applied to the adaptive filtering problem. The method provides convergence comparable to that of RLS (recursive-least-squares) schemes and has a computational requirement that is intermediate between the LMS (least-mean-square) and the RLS methods. It does not suffer from any known stability problems.<> View full abstract»

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  • Accuracy management for VLSI timing analysis

    Publication Year: 1989, Page(s):2027 - 2031 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (460 KB)

    The authors show that algorithms of different accuracy levels can be carefully and automatically mixed to get a desired global accuracy. For instance, highly accurate algorithms may only be required along critical paths to produce a highly accurate delay estimate. They outline several linear-time heuristic algorithms, based on a detailed analysis of simple logic chains, that allow the management o... View full abstract»

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  • A semi-analytic slope delay model for CMOS switch-level timing verification

    Publication Year: 1989, Page(s):2032 - 2035 vol.3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (275 KB)

    A novel slope delay model for CMOS switch-level timing verification is presented. It differs from conventional methods in being semi-analytic in character. The model assumes that all input waveforms are trapezoidal in overall shape, but that they vary in their slope. This simplification is quite reasonable and does not seriously affect precision, but it facilitates rapid solution. The model divide... View full abstract»

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  • A study of voice/non-voice discrimination method using neural networks for integrated packet switching system

    Publication Year: 1989, Page(s):2096 - 2099 vol.3
    Cited by:  Papers (1)  |  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (301 KB)

    Voice packet technology, which handles analog signals such as DTMF (dual-tone multifrequency) signals and voiceband data as well as voice, image and data, is a key technology for a fast packet-switching system for multimedia communication. Transmission of voice signal in packets involves echo canceling, bandwidth-compression coding, and silence compression. However, if nonvoice signals like DTMF s... View full abstract»

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  • A recursive solution for strongly nonlinear systems by combining Volterra principles with the harmonic balance technique

    Publication Year: 1989, Page(s):2159 - 2164 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (527 KB)

    An algorithm is presented for determining the steady-state solution of a strongly nonlinear system. It combines an existing Volterra approach for weakly nonlinear systems with some principles that are used in the harmonic balance technique. A uniform method is realized that is applicable in a large class of problems. To demonstrate its possibilities an operational amplifier causing slew-induced di... View full abstract»

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  • 1989 IEEE International Symposium on Circuits and Systems (Cat. No.89CH2692-2)

    Publication Year: 1989
    Request permission for commercial reuse | PDF file iconPDF (31 KB)
    Freely Available from IEEE
  • A Z-transform analysis of uniform and nonuniform RC -lines

    Publication Year: 1989, Page(s):2215 - 2218 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (132 KB)

    In ICs with small feature sizes, interconnections introduce signal delay and distortion. In network analysis programs, such as SPICE, RC lines are simulated by RC ladders. The authors show that Z-transform analysis of uniform or exponential RC ladders with given boundary conditions allows an estimation of the number of elements, depending on the load of the line View full abstract»

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  • Nonlinear and transient microwave and RF modeling of the PIN diode

    Publication Year: 1989, Page(s):2209 - 2214 vol.3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB)

    Models for analyzing the PIN diode in switch, attenuator, and limiter applications are presented. A nonlinear forward-bias model is outlined. The resulting nonlinear transfer functions are evaluated out to third order and discussed in terms of distortion intercept points for series- and shunt-mounted PIN diodes. The model is compared with series circuit experimental data. A transient PIN diode mod... View full abstract»

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  • Quasi-harmonic analysis and applications of coupled Schottky lines

    Publication Year: 1989, Page(s):2205 - 2208 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (236 KB)

    A quasiharmonic analysis of coupled nonlinear lossy lines such as coupled Schottky lines is presented. The system analyzed consists of two identical, uniformly coupled transmission lines with uniformly distributed nonlinear capacitances. It is shown that such coplanar structures can be utilized as voltage-tunable codirectional couplers and switches. The example of a dual-gate-type structure for ap... View full abstract»

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  • Noise sensitivity of projection neural networks

    Publication Year: 1989, Page(s):2201 - 2204 vol.3
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (272 KB)

    The authors analyze network sensitivity to noise introduced at both the neural and interconnect levels. Two ANNs (artificial neural networks) are analyzed. The first is the alternating projection neural network (APNN), which can be used as a content-addressable memory. The authors show that its performance improves as the percentage of clamped neurons is increased. The second is the layered classi... View full abstract»

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  • A modified perfect reconstruction QMF bank with an auxiliary channel

    Publication Year: 1989, Page(s):2132 - 2135 vol.3
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (256 KB)

    Quadrature mirror filter (QMF) banks have been studied extensively because of their attractive properties, which are useful in many applications. One desirable property is perfect reconstruction, i.e. in the absence of any channel modifications the filter bank transfer function should be a pure delay. The process of designing filter banks having this perfect reconstruction property is not easy due... View full abstract»

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  • An application of neural net in decoding error-correcting codes

    Publication Year: 1989, Page(s):782 - 785 vol.2
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (156 KB)

    A neural net architecture is implemented as a maximum-likelihood decoder. Any block binary code can be easily decoded. In a von Neumann computer, the computation of all the Hamming distances requires exponential time; however, polynomial-time is needed for the neural net, taking advantage of parallel computation. In fact, picking the maximum is a polynomial-time problem. Since the decoding problem... View full abstract»

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  • Word based data compression schemes

    Publication Year: 1989, Page(s):300 - 303 vol.1
    Cited by:  Papers (2)  |  Patents (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB)

    Documents, papers, and reports contain large amounts of redundancy. This redundancy can be minimized by data-compression techniques to save storage space or to increase transmission efficiency. Several data-compression algorithms that are character based have been proposed in the literature. In English test files, however, the natural units of repetition are words or phrases, rather than character... View full abstract»

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  • A result on stability of one-state nonlinear dynamical systems

    Publication Year: 1989, Page(s):610 - 613 vol.1
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (224 KB)

    A simple method for determining an estimate of the domain of attraction for the state-space origin is presented for the class of one-state nonlinear dynamical systems. The solution is obtained on the basis of a simple determinantal criterion, which points out when a matrix depending on a parameter loses its definiteness and allows one to derive easily the desired region in the state-space. The pro... View full abstract»

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  • A new approach to time-frequency signal decomposition

    Publication Year: 1989, Page(s):1248 - 1251 vol.2
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (256 KB)

    A recently developed method for separating time-frequency disjoint signal components is based on the Wigner distribution (WD) and uses a time-frequency masking procedure followed by a signal synthesis step. A problem with this method is that the positioning of the time-frequency masks is done manually and can be difficult due to WD interference terms. Also, masking is ineffective if a WD interfere... View full abstract»

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  • Analysis of neural algorithms for parallel architectures

    Publication Year: 1989, Page(s):2197 - 2200 vol.3
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (244 KB)

    The computational properties (global and local convergence, computational complexity and algorithm tuning) of neural algorithms are analyzed from a circuit perspective. Different equivalent algorithms are derived by applying various numerical techniques (multistep and relaxation methods) to the stationary and dynamic analysis of a common neural circuit model. Simulation experiments are presented f... View full abstract»

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  • Performance of an adaptive array under sensor failure

    Publication Year: 1989, Page(s):2128 - 2131 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (248 KB)

    It has been reported that during experiments with linear arrays at sea, sensor failure occurs with nearly 100% probability. An upper bound on the increase in sidelobe level for a nonadaptive weighted array with inoperative elements has been reported. The authors consider the performance of a narrowband adaptive array that has failed sensors. Assuming that each sensor fails independently and with e... View full abstract»

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  • A neural network for temporal pattern recognition

    Publication Year: 1989, Page(s):778 - 781 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (284 KB)

    A neural network that can be trained to recognize a sequence of events in time is presented. It utilizes a process of temporal integration, which is implemented by providing each node with a fading memory and the use of a special interconnect pattern. A simulation model for a motion detector based on the proposed network was implemented. It can be trained to distinguish between several speeds of a... View full abstract»

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  • A generalized treatment of mutual coupling compensation for ESPRIT

    Publication Year: 1989, Page(s):296 - 299 vol.1
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (188 KB)

    The ESPRIT algorithm has been shown to be an effective solution to the angle of arrival estimation problem. One possibility for the implementation of ESPRIT is the use of a linear array to provide for the sensor pairs. A technique is discussed for compensation of mutual coupling effects between array elements. Computer simulation demonstrates a significant improvement in performance View full abstract»

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  • A piecewise decomposition technique for analysis of nonlinear networks with distributed components

    Publication Year: 1989, Page(s):606 - 609 vol.1
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (184 KB)

    A method is presented for the analysis of nonlinear networks which contain lossy transmission line systems. The method is based on a piecewise decomposition technique where the network is decomposed into linear and nonlinear subnetworks. Topological and constitutive relations of each subnetwork and constraints resulting from interconnection of these subnetworks lead to a set of nonlinear equations... View full abstract»

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