In this experiment, we were required to design a digital FIR filter using Frequency Sampling Method (FSM). Scilab was used to implement it.Here we observed that phase spectrum is linear within the positive lobs of magnitude spectrum. Discontinuity is observed i phase plot between lobes and also when the phase spectrum goes out of the range of -pi to +pi.
https://drive.google.com/file/d/0B9zlXLFfOipjQUZ3Q3pvU1RRTVUyMWpFdUJ4djd6UzltVlU4/view?usp=sharing
No of lobes in frequency response increased with increase in order.
ReplyDeleteYes we observed that.
DeleteThis method is useful for the design of non-prototype filters where the desired magnitude response can take any irregular shape.
ReplyDeleteWherever the lowest peak was observed in magnitude response, corresponding zero crossing was observed in phase response.
ReplyDeleteYes
Delete