Low-order IIR filter bank design

Tuan, Hoang Duong; Son, Tran Thai; Nguyen, Truong Q.

doi:10.1109/icassp.2003.1201733

Cited by 9 publications

(6 citation statements)

References 13 publications

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“…For all three axis, the frequency bandwidth is measured whenever the deadband bound is violated and the corresponding cut-off frequencies are sent along with the sample values to the receiver as side information to control the synthesis filter. For the filter itself, we use a parametric second-order lowpass IIR-filter characterized by almost linear phase behaviour in the passband [10]. Its group delay depends on the applied cut-off frequency.…”

Section: Methodsmentioning

confidence: 99%

A Novel Signal Reconstruction Algorithm for Perception Based Data Reduction in Haptic Signal Communication

Kammerl

Hinterseer

Steinbach

2007

2007 16th International Conference on Computer Communications and Networks

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The performance and immersiveness of telepresence and teleaction systems critically depend on the quality of the communication between the operator and the teleoperator. High packet rate for low delay data exchange in internet-based teleoperation is one of the major challenges in this context. A psychophysically motivated data reduction scheme, earlier presented by the authors, solves this problem by the use of signal amplitude dependent deadband quantization. This scheme successfully limits the amount of transmitted packets, but as soon as the size of the deadband exceeds a certain limit, noticeable and disturbing artifacts are introduced into the haptic signals. In this paper, we present a novel signal reconstruction technique, based on a signal adaptive synthesis filter. It removes discontinuities in the displayed signals and enables the use of strong deadband based data reduction without perceptible disturbance in the telepresence system.

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Section: Methodsmentioning

confidence: 99%

A Novel Signal Reconstruction Algorithm for Perception Based Data Reduction in Haptic Signal Communication

Kammerl

Hinterseer

Steinbach

2007

2007 16th International Conference on Computer Communications and Networks

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“…Another particularity is that these systems produce coordinated multidimensional rhythms of motor activity, under the control of simple input signals. Such systems are deemed to strongly reduce the dimensionality of the control problem: only constant inputs to modulate high-dimensional oscillator outputs (in contrast to filter banks [39] or the like). Furthermore, planning in terms of autonomous nonlinear attractor landscapes promises more general movement behaviors than traditional approaches using time-indexed trajectory planning.…”

Section: State Of the Artmentioning

confidence: 99%

Timed trajectory generation using dynamical systems: Application to a Puma arm

Santos

Ferreira

2009

Robotics and Autonomous Systems

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a b s t r a c tWe present an attractor based dynamics that autonomously generates trajectories with stable timing (limit cycle solutions), stably adapted to changing online sensory information. Autonomous differential equations are used to formulate a dynamical layer with either stable fixed points or a stable limit cycle. A neural competitive dynamics switches between these two regimes according to sensorial context and logical conditions. The corresponding movement states are then converted by simple coordinate transformations and an inverse kinematics controller into spatial positions of a robot arm. Movement initiation and termination is entirely sensor driven. In this article, the dynamic architecture was changed in order to cope with unreliable sensor information by including this information in the vector field.We apply this architecture to generate timed trajectories for a Puma arm which must catch a moving ball before it falls over a table, and return to a reference position thereafter. Sensory information is provided by a camera mounted on the ceiling over the robot. A flexible behavior is achieved. Flexibility means that if the sensorial context changes such that the previously generated sequence is no longer adequate, a new sequence of behaviors, depending on the point at which the changed occurred and adequate to the current situation emerges.The evaluation results illustrate the stability and flexibility properties of the dynamical architecture as well as the robustness of the decision-making mechanism implemented.

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“…where H o (s), H e (s) correspond to stable all-pass filters obtained on the basis of odd and even parts of denominator polynomials of a lattice LC filter [3]. Paradoxically, this property of the lattice two-port is widely used in the theory and design of IIR digital filter pairs [4,5], but in the design of analog filter pairs it is seldom used. Filter banks are often realized as FIR or Chebyshev filters.…”

Section: H L (S) =mentioning

confidence: 99%

“…Paradoxically, this property of the lattice two-port is widely used in the theory and design of IIR digital filter pairs [4,5], but in the design of analog filter pairs it is seldom used. Filter banks are often realized as FIR or Chebyshev filters.…”

Section: Introductionmentioning

confidence: 99%

Analog filter pair design on the basis of a gyrator–capacitor prototype circuit

Handkiewicz

Katarzyński

Szczęsny

et al. 2010

Circuit Theory & Apps

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SUMMARYThe paper presents an algorithmic approach to a low-sensitivity design strategy for analog filter pairs based on a gyrator-capacitor prototype circuit. The general structure of the prototype circuit is proposed. It assumed that the generic structure of the prototype circuit can evolve, with the use of additional gyrators, into a circuit with increased redundancy. It is shown that symbolic analysis of the prototype circuit, used to formulate a set of nonlinear algebraic equations, is necessary to achieve a sufficiently high algorithm operation speed. To find a solution to this specific system of nonlinear algebraic equations, different numerical methods are compared. The modified Hooke and Jeeves algorithm is found to be the most effective. The elaborated algorithms and programs are illustrated with the seventh-order filter pair example. The obtained filter is better than the filter obtained using LC ladder structures with respect to chip area and power consumption, and these improvements are obtained without loss of sensitivity properties.

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Low-order IIR filter bank design

Cited by 9 publications

References 13 publications

A Novel Signal Reconstruction Algorithm for Perception Based Data Reduction in Haptic Signal Communication

A Novel Signal Reconstruction Algorithm for Perception Based Data Reduction in Haptic Signal Communication

Timed trajectory generation using dynamical systems: Application to a Puma arm

Analog filter pair design on the basis of a gyrator–capacitor prototype circuit

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