This lab introduces a practical application where sinusoidal signals are used to transmit information: a
touch-tone dialer. Bandpass FIR filters can be used to extract the information encoded in the waveforms.
The goal of this lab is to design and implement bandpass FIR filters in M ATLAB , and to do the decoding
automatically. In the experiments of this lab, you will use
, to implement filters and
to obtain the filter’s frequency response. 1 As a result, you should learn how to characterize a filter
by knowing how it reacts to different frequency components in the input.
The goal of this lab is to learn some methods for designing practical FIR filters in Matlab. These filters
will have a finite number of coefficients, and a frequency response that approximates an ideal frequency