Simple FIR Digital Filters a better approximation to the ideal lowpass filter is given by a higher-order moving average filter Signals with rapid fluctuations in sample values are generally associated with high- frequency components These high-frequency components are essentially removed by an moving-average filter resulting in a smoother output waveform 12 Copyright C 2001, S K. MitraCopyright © 2001, S. K. Mitra 12 Simple FIR Digital Filters • A better approximation to the ideal lowpass filter is given by a higher-order moving￾average filter • Signals with rapid fluctuations in sample values are generally associated with high￾frequency components • These high-frequency components are essentially removed by an moving-average filter resulting in a smoother output waveform