A B S T R A C T While Partial Discharge (PD) measurements are widely used in testing power apparatus after manufacture, there is now a trend to extend them to on-site measurements. The major problem encountered in the latter measurements is the strong coupling of external noises particularly from discrete spectral interferences (DSI) e.g. broadcasting stations as well as impulsive disturbances....

This paper presents a new method based on antigen-antibody reaction of immune system in biology, has been adopted for the design of IIR digital filter using an evolutionary Tagushi Immune Algorithm (TIA). The design process is reduced to a constrained optimization problem the solution of which is achieved by the convergence of the TIA which implements a learning technique inspired by human immu...

Signals in a two-channel quadrature mirror filter bank are decomposed into low and high frequency components. Similarly, analytic signals can be extracted from the original signal with only positive or negative frequency contents. Multirate systems based on this idea are called quadrature mirror Hilbert transformers. Just like the case of quadrature mirror filter banks, the FIR and IIR designs ...

Infinite impulse response (IIR) systems, with their ability to model intricate system behaviors, have proven be a powerful class of digital filters. However, accurately identifying the optimal filter parameters for emulation remains challenge. Metaheuristic algorithms emerged as effective tools parameter optimization in IIR design, allowing exploration spaces and discovery suitable sets. This p...

This paper is concerned with the design and implementation of frequencyselective recursive filters in which the filtered output is incorporated on the input side, at various lags, via a series of feedback terms. Such devices are commonly described as infinite impulse response (IIR) filters. Filters that are devoid of feedback are apt to be described as finite impulse response (FIR) filters. Rel...

In this paper, hybrid technique with differential evolution (DE) method as a global search technique and binary successive approximation (BSA) based evolutionary search method as a local search technique is proposed. Evolutionary search is used for the exploration and pattern search method for exploitation. To initiate with good population, the opposition based learning strategy is applied. Mig...

In this paper, IIR polyphase filters present several interesting properties: they require a very small number of multipliers to implement, they are inherently stable and have low round off noise sensitivity and no limit cycles. Furthermore, it is possible to achieve almost linear phase designs. Pulse shaping filters have been designed and implemented by using Raised cosine filter, Nyquist filte...

The number of bits required to accurately represent a received signal in a wireless system changes as the out-of-band interference is removed by an IIR digital filter, if the filtering is done in stages, such as second-order sections. Taking advantage of this fact can reduce the size of the datapath in a VLSI realization of a digital filter, and hence power and area can be saved without decreas...

The multi-ripple filter is a new approach to model losses in digital waveguide synthesis. Stringed musical instruments produce decaying sounds due to physical losses, which need to be modeled. In digital waveguide string model, the losses are modeled with a loss filter. Another function for the loss filter is that it is needed to make the model stable. In piano synthesis, a high-order loss filt...