Digital filters are commonly used as an essential element of everyday electronics such as radios, cell phones, and stereo receivers. Digital filters may be more expensive than an equivalent analog filter due to their increased complexity, but they may lead to many designs which are impractical or impossible as analog filters. Basically there are two types of digital filters, which are FIR (Fini...

This paper describes a method for optimizing low-pass infinite impulse response (IIR) digital differentiators. The wide band differentiator is cascaded with low-pass IIR filter resulting in linear phase low-pass IIR digital differentiator. Further the frequency response of IIR differentiator is improved by altering the gain and denominator coefficients of that differentiator. The genetic algori...

In the design of IIR digital filters, the method that utilizes the classic analog filter design theory to design analog filters and then obtain the corresponding digital filters by s–z transformation is well-known. However, IIR digital filters obtained via the bilinear s–z transformation have just equal-order numerator and denominator. Having unequal-order numerator and denominator will give mo...

The paper introduces designing of MAC 20 tap IIR filter based on Field Programmable Gate Array (FPGA).The implementation is based on Multiply Add and Accumulate algorithm (MAC) unit which plays important role in many of the DSP aplications.MAC unit is used for best performance digital signal processing system. The designed filter has been synthesized on Digital Signal Processor (DSP) slice base...

Generally Digital Signal Processing is Mathematical manipulation of the signals. The manipulation parameters may get differ from one technique to another. In this paper IIR Butterworth filters has been designed for various orders to analyze group delay. The developed IIR filters are designed and simulated using matlab with different filter orders. The simulated results shows that IIR filters wi...

Fractional delay (FD) filters are an important class of digital filters and are useful in various signal processing applications. In this paper, the design problem of the maxflat FD IIR filters is discussed, and a new closed-form expression for its filter coefficients is presented. The filter coefficients are directly derived by solving a linear system of Vandermonde equations, which are obtain...

Design problem of infinite impulse response (IIR) filters is generally a non-linear optimization problem due to the presence of denominator polynomial. Additionally, the stability condition (position of poles) must be considered when optimizing the filter coefficients. Hence, an iterative optimization is usually required to solve the design problem for stable IIR filter. In this paper, we prese...

In this paper an improvement of a Genetic algorithm using in constructing an IIR digital filter is presented. The aim of our improvement are reconstruction of genetic operators and new procedure for initial population selecting applied on a filter design problem. The result of the paper is modified genetic algorithm which allow us to find the best IIR filter among all filters with a requaired t...

Adaptive infinite-impulse-response (IIR) filtering provides a powerful approach for solving a variety of practical signal processing problems. Because the error surface of IIR filters is typically multimodal, global optimisation techniques are generally required in order to avoid local minima. This contribution applies the particle swarm optimisation (PSO) to digital IIR filter design in a real...