Sep 24, 2006 #1 S shameem Member level 5 Joined Oct 27, 2005 Messages 90 Helped 5 Reputation 10 Reaction score 3 Trophy points 1,288 Activity points 2,031 hi, Does macs in a fir filters reduces to half if i use the coefficiens which are even and symmetric (i.e h = h(N-n), N is even no.). If yes, how?????? If anybody have any idea, please help me. thanks shameem
hi, Does macs in a fir filters reduces to half if i use the coefficiens which are even and symmetric (i.e h = h(N-n), N is even no.). If yes, how?????? If anybody have any idea, please help me. thanks shameem
Sep 25, 2006 #2 Z zorro Advanced Member level 4 Joined Sep 6, 2001 Messages 1,130 Helped 357 Reputation 712 Reaction score 298 Trophy points 1,363 Location Argentina Activity points 8,913 In that way you can replace two MACS by an addition and a MAC: y=x[0]*h[0]+........+x[N-1]*h[N-1] y=(x[0]+x[N-1])*h[0]+....... In some implementations in can save resources. In many DSP processors, as an add takes the same time of a mac, nothing is saved. Regards Z
In that way you can replace two MACS by an addition and a MAC: y=x[0]*h[0]+........+x[N-1]*h[N-1] y=(x[0]+x[N-1])*h[0]+....... In some implementations in can save resources. In many DSP processors, as an add takes the same time of a mac, nothing is saved. Regards Z