Recently discrete-time cellular neural network (DT-CNN) is applied to many image processing such as compression and reconstruction, recognition, and so on. Not a few model works as a simple filter and doesn’t make good use of CNN dynamics by feedback A template, which is one of the significant characteristics of CNN. If CNN is applied to a filter by an only feed forward B template, you should p...

Wave digital filter (WDF) structures for high-speed narrow-band and wide-band filtering are introduced. The narrow-band filter is composed of a periodic model filter and one or several, possibly periodic, masking filters in cascade. Lattice and bireciprocal lattice WDF filters are used for the model and masking filters, respectively. The wide-band filter consists of a narrow-band filter in para...

This paper proposes an on-off coupling process for chaos synchronization and information processing. An in depth analysis for the net effect of a conventional coupling is performed. The stability of the process is studied. We show that the proposed controlled coupling process can locally minimize the smoothness and the fidelity of dynamical data. A digital filter expression for the on-off coupl...

High frequency (HF) transmitters implemented with the multi-octave power amplifier (PA) are always faced problem of interfering harmonics because nonlinearity PA. In this paper, harmonic cancelation digital predistortion (HC-DPD) scheme is proposed and well discussed to cancel in-band intermodulation distortion (IMD) as out-of-band at same time. With filter-less scheme, bulky lossy filter banks...

A correction procedure based on digital signal processing theory is proposed to smooth the numeric oscillations in electromagnetic transient simulation results from transmission line modeling based on an equivalent representation by lumped parameters. The proposed improvement to this well-known line representation is carried out with an Finite Impulse Response (FIR) digital filter used to exclu...

An algebraic technique which computes nonlinear, delay-free digital filter networks is applied to model the Dolby B in the discretetime. The model preserves the topology of the analog system, and imports the characteristics of the nonlinear processing blocks which are responsible of the peculiar functioning of Dolby B. The resulting numerical system exhibits qualitatively similar dynamic behavi...

An adaptive digital filtering system is developed for low-frequency audio transducers to reduce nonlinear transducer responses in an effort to eliminate audible harmonic distortion. A Spectrum PC/C5X digital signal processing (DSP) board is used to implement the filtering algorithm , and a piezoelectric accelerometer is used to measure the transducer's movement. The filter is based on the least...

Digital waveguide modeling of a nonlinear vibrating string is investigated when the nonlinearity is essentially caused by tension modulation. We derive synthesis models where the nonlinearity is implemented with a time-varying fractional delay filter. Also, conversion from a dual-delay-line physical model into a single-delay-loop model is explained. Realistic synthetic tones with nonlinear effe...

This paper describes an efficient algorithm for the design of multiplierless approximately linear-phase lattice wave digital (LWD) filters (parallel connections of two all-pass filters). The coefficient optimization is performed in two basic steps. First, a nonlinear optimization algorithm is used for determining a parameter space of the infinite-precision coefficients including the feasible sp...

This paper presents a comparative analysis between two current control strategies, constant source power and generalized Fryze current, used in Active Power Filter (APF) applications having three different modulation methods. The Hysteresis Band (HB) and first-order Delta-Sigma Modulation (DSM) as well as the second-order DSM is applied. The power section of the active power filter is viewed as...