how we can satify this length formula in filters

[mdzafar]

hi


i want a help that how this formula is satisfied .........

lenth of L = N+M-1
Q: Is this length of filter , than tell me how we satisfy this formula........

if anyone knows about digital filters length , plz help me........
beat regards

 

[mondunno]

that is the length of 2 sequences of length N and M, convolved
figure out urself, digital filters is vast dude. the problem what u've shown is too specific. filters implement convolution true, but the length depends on the receiver.
if its linear convolution application then length matches what u've told

 

[naresh850]

the length of filter kernal is different issue