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MATLAB® and Its Applications in Engineering: [Based on MATLAB 7.5 (R2007b)] by Manoj Kumar Sharma, Ashok Kumar Goel, Raj Kumar Bansal

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15.10. Digital Filter Design

The process of deriving a realizable transfer function of a digital filter by considering given frequency response specifications is known as digital filter design. The digital filters can be classified as:

  • Finite-duration impulse response (FIR) filter

  • Infinite-duration impulse response (IIR) filter

In MATLAB, there are built-in functions which can be used to design digital filters like IIR and FIR.

15.10.1. IIR Digital Filter Design

The different types of IIR digital filters are:

  • Butterworth filter

  • Chebyshev Type I filter

  • Chebyshev Type II filter

  • Elliptic filter

Before designing a filter, it is necessary to obtain the order of the filter. The syntax of different MATLAB functions used to obtain the order of a filter ...

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