Filter design and equalization - MIT OpenCourseWare

Linear phase filterssuppose• n = 2N + 1 is odd• impulse response is symmetric about midpoint:h t = h n−1−t , t = 0, ...,n − 1then−iωH(ω) = h 0 + h 1 e−i(n−1)ω+ · · · + h n−1 e−iNω= e (2h 0 cos Nω + 2h 1 cos(N −1)ω + · · · + h N )Δ−iNω= e H(ω)Filter design 8