7.3 Digital Filter Design: Basic Approaches FIR filter design is based on a direct approximation of the specified magnitude response,with the often added requirement that the phase be linear The design of an FIR filter of order N may be accomplished by finding either the length-(N+1)impulse response samples (h[n]}or the (N+1)samples of its frequency response H(ei)§7.3 Digital Filter Design: Basic Approaches • FIR filter design is based on a direct approximation of the specified magnitude response, with the often added requirement that the phase be linear • The design of an FIR filter of order N may be accomplished by finding either the length-(N+1) impulse response samples {h[n]} or the (N+1) samples of its frequency response H(ejω)