The paper describes the design process of discrete network – digital low-pass filter with Infinite Impulse Response (IIR filter). Based on given parameters that network should meet, and with the use of HDL hardware description language and MATLAB software package, hardware implementation of the filter transfer function was designed. Simulations confirmed the validity of the implementation desig...

This paper is concerned with design of cascading CIC filter and FIR filter to improve the passband droop and stopband attenuation for decimation filter. Decimation filter has wide application in both analog and digital systems for data rate conversion as well as filtering. We have three class of filters FIR, IIR and CIC filters. IIR filters are simpler in structure, but not satisfy linear phase...

This paper proposes the innovative methodologies for the robust and stable design of infinite impulse response (IIR) digital filters using different mutation variants of differential evolution (DE). A multivariable optimization is employed as the design criterion to obtain the optimal stable digital IIR filter which satisfies the different performance requirements like minimizing the magnitude ...

This paper proposes the implementation of IIR filter using Xilinx System Generator software on an FPGA. While designing any digital filter, the overflow and quantisation effects must be considered for stability. The speed of computation is greatly increased by implementing a filter on an FPGA, rather than a Conventional DSP processor. We first design the filter analytically from the given speci...

We present an efficient and novel procedure to design two-dimensional (2D) linear-phase IIR filters with less hardware resource. A 2D linear-phase FIR filter prototype is first designed using semidefinite programming (SDP). The prototype filter is then decomposed into modular structures via Schur decomposition method (SDM). Each section is reduced into IIR structures using a novel digital syste...

Digital filter design can be performed very efficiently using modern computer tools. The drawback of the numeric-based tools is that they usually generate a tremendous amount of numeric data, and the user might easily lose insight into the phenomenon being investigated. The computer algebra systems successfully overcome some problems encountered in the traditional numeric-only approach. In this...

iv

Digital Filter is an important part of digital signal processing (DSP) system and it usually comes in two categories: finite impulse response (FIR) and infinite impulse response (IIR). FIR filter is an attractive choice because of the ease in design and stability. By designing the filter taps to be symmetrical about the centre tap position, a FIR filter can be guaranteed to have linear phase. L...

This paper presents an application of variable infinite impulse response (IIR) digital filters based on the Constantinides frequency transformation to adaptive filtering. We propose a new unified framework for adaptive detection of narrowband signals using variable band-stop IIR digital filters with arbitrary transfer functions. It is also shown that our proposed method includes the all-pass-ba...

The perfect linear phase requirement can be achieved only by direct design with an FIR filter at the expense of high filter order and hence high computational burden for the given specification. Alternatively, IIR filters can be designed with much smaller orders than their FIR counterparts, but at the expense of the nonlinear phase. However, it is possible to design almost linear-phase IIR filt...