The design and implementation of finite impulse response filters
Patrick A. Gaydecki · Institution of Engineering and Technology eBooks · 2004
Design of FIR filters is predicated on a single question: given a desired frequency response, how do we obtain the (discrete) coefficients of its impulse response? There are several ways in which the coefficients may be obtained, and each method has its own merits and limitations. In this chapter, we shall study two of the most widely applied techniques, these being the window method and the frequency sampling method. It is fair to say that in practice the overwhelming majority of filters are computed using these two methods, since they are simple to implement, the algorithms are inherently stable, efficient and rapid and the resulting impulse response has excellent phase and frequency response characteristics.