We consider comparator-based nonlinear feedback systems, and use Tsypkin’s method to develop a strategy with which to find systems with low-pass linear part for which the describing function technique erroneously predicts limit cycles. We produce an infinite set of examples of systems with very low-pass linear parts for which the describing function technique predicts spurious limit cycles, and...

Control of a class of uncertain nonlinear systems, which estimates unavailable state variables, is considered. A new approach for robust tracking control problem of satellite for large rotational maneuvers is presented in this paper. The features of this approach include a strong algorithm to estimate attitude, based on discrete extended Kalman filter combined with a continuous extended Kalman ...

An application of block-based physical modeling for digital sound synthesis is presented in this paper. A membrane model in terms of a fourth order, two-dimensional partial differential equation is solved and discretized with the functional transformation method. The resulting algorithm constitutes an input-output description with input force and output velocity of the membrane. This input-outp...

imated nonlinear filter banks has been introduced [4, 8,9], where PR is obtained by imposing restrictions on the filter structure instead of on the filter coefieients. We use here a particularisation of a we propose a the general structure of a JPEG coder, but which uses a nonlinear transform to replace the DCT. The nonlinear transform pyramidal coder' which

The book, Fundamentals of Nonlinear Digital Filtering, by Jaako Astola and Pauli Kuosmanen presents both a useful selection guide for practitioners seeking a signal processing solution and a valuable panoramic perspective for theoreticians interested in the underlying principles on which nonlinear digital filters are based. For example, the results presented in their book make it clear that mos...

Keywords: Edge-preserving regularization Salt-and-pepper impulse noise Cardinal splines Expeditious algorithm Image de-noising Cardinal spline interpolation Edge preservation Two-phase noise removal a b s t r a c t This work proposes a faster and an efficient way to remove salt-and-pepper impulse noise and edge-preserving regularization of the henceforth obtained image. In this paper, we propos...

Nonlinear filter generators are common components used in the keystream generators for stream ciphers and more recently for authentication mechanisms. They consist of a Linear Feedback Shift Register (LFSR) and a nonlinear Boolean function to mask the linearity of the LFSR output. Properties of the output of a nonlinear filter are not well studied. Anderson noted that the m-tuple output of a no...

The main topics of this part of the laboratory are structures for digital filters (FIR/IIR filters in direct form and cascade form) and effects of finite-precision arithmetic (generation of round-off noise and effects of coefficient quantization). 1 Theoretical Overview This short overview only presents some of the most important points. For more complete descriptions see the references mention...