In the previous experiment FIR filter was designed using window function which is little bit complicated method. Another method used for FIR filter design was using Frequency Sampling Method(FSM). While performing the experiment, this method was found to be simpler than the method using window function. In this desired frequency response was specified. The given frequency response was sampled at a set of equally spaced frequencies to obtain N samples.Thus , it gave the N-point DFT of Hd(2pnk/N). Thus by using
the IDFT formula, the
filter co-efficients can be calculated. Increase in number of samples reduces the error.Thus we FIR filter design
using Frequency Sampling Method and noted the output.
Frequency sampling realization is computationally more efficient than direct form realization.
ReplyDeleteYes, due less number of computations
DeleteIt is a very efficient method
ReplyDeleteThis is the simplest method of FIR filter design.
ReplyDeleteThe sample values are symmetric about k=N/2.
ReplyDeleteYes, the sample values are symmetric about centre point
DeleteIf number of samples are increased then error decreases
ReplyDeleteYes, larger number of samples give more data of original signal.
DeleteFSM is a direct method to design filter
ReplyDeleteYes, because don't calculate desired response.
Delete