Thanks porten! Thanks Bitstream!
But our professor has said that design your own filter!(not used built in function of matlab).
I am designing my own filter.The problem is still there.First, i have to know filter's order(N). One way is to find from its transition width. The pass-band edge frequency is 500Hz and stop band edge frequency is 700Hz. But i don't understand how to get it? Can you help me?
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