In the fifth experiment we perform analog and digital butterworth filter design. In the experiment we also study the aliasing effect due to sampling in IIM method and frequency warping effect in BLT method.
IIM: Mapping is many to one. No frequency warping effect is present. It is not suitable to design HPF and BRF.
BLT: Mapping is one to one. Frequency warping effect is present. HPF and BRF can be designed.
Because of non-linear mapping; the amplitude response of digital IIR filter is expanded at lower frequencies and compressed at higher frequencies in comparison to the analog filter is called frequency warping.
well written!
ReplyDeleteBLT is better than IIM
ReplyDeletegood explanation
ReplyDeleteIn Butterworth filter as we go on increasing order of filter, response becomes more sharper and at approaches to ideal response.
ReplyDeletevery informative
ReplyDeletenice
ReplyDeleteNicely explained
ReplyDeleteBLT is better than IIM
ReplyDeleteshortly given advantages of BLT.
ReplyDeleteNice
ReplyDeleteDifference between IIM and BLT methods for filter design are well explained.
ReplyDeletegood explained but whats about butterworth response??
ReplyDelete