The aim of this experiment was to perform FIR filter design is Frequency Sampling Method. Here the output h[n] is obtained by IDFT of h(w) obtained by the magnitude spectrum of filter required.When the input specifications are kept same as previous experiment wherein FIR filter design was performed using Windowing method, it is observed that as the order increases , the number of lobes in the stop band increases.The advantage of FSM over windowing is the efficient frequency sampling structure which is obtained when most of the frequency samples are zero. Like window method, the h[n] (transfer function) obtained is symmetric.
Can you give an application of frequency sampling?
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ReplyDeleteDiscontinuity is observed in phase plot between lobes and also when the phase spectrum goes out of the range of -pi to pi.
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ReplyDeleteOrder of the filter for appropriate waveform can be checked using adaptive technique of constantly checking the waveform
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