Interpolated Finite Impulse Response (IFIR)
نویسنده
چکیده
The finite impulse response filters are inherently stable and have linear phase response property. The main drawback of these filters is lies in requirement of higher orders for similar magnitude response compared to Infinite Impulse response filters. Also the amount of computational complexity needed for the implementation of the filter, especially for the filters with narrow transition band is much higher. In order reduce the computational complexity of narrowband FIR filters, the interpolated FIR (IFIR) filter technique is used.
منابع مشابه
Different Approaches for the Design of IFIR Compaction Filter
Optimization of filter banks based on the knowledge of input statistics has been of interest for a long time. Finite impulse response (FIR) Compaction filters are used in the design of optimal signal adapted orthonormal FIR filter banks. In this paper we discuss three different approaches for the design of interpolated finite impulse response (IFIR) compaction filters. In the first method, the ...
متن کاملOptimal Interpolated FIR (IFIR) Digital Filter Design with Spectral Estimation for Radar and Sonar System
Finite impulse response (FIR) filters are highly desirable in digital filter design because of their inherent stability and linear phase. However, when narrow transition band characteristics are required, they typically have a much higher filter order than their infinite impulse response counterparts with equivalent magnitude spectrums. Widowing methods and the frequency response sampling metho...
متن کاملDesign of M-Band NPR Cosine-Modulated Filterbank Using IFIR Technique
This paper presents a design of M-band near perfect reconstructed (NPR) cosine-modulated filterbank (CMFB). The prototype filter is formulated as an interpolated finite impulse response (IFIR) filter. Suitable stretched factor is used to provide considerable reduction in computation cost as well as minimum value of error parameters. Further minimization in errors has been achieved by applying a...
متن کاملSimple Method for Lowpass Narrowband Fir Filter Design
This paper presents simple method for the narrowband low-pass FIR (Finite Impulse Response) filter design. The method is based on the IFIR (Interpolated FIR) structure where the model filter is the ST (Stepped Triangular) impulse response filter cascaded with the simple compensator.
متن کاملReview of the Interpolated Finite Impulse Response Technique
FIR filters can achieve linear phase, but for a given set of specifications require much higher order than the corresponding IIR design, especially when the transition band is very narrow. This paper reviews the original and some further developments of the IFIR technique, which is used to lower the complexity of a FIR filter.
متن کامل