Monday, May 29, 2017

Why do digital filters work?


So I just started reading on FIR and IIR filters and am amazed by how "simple" the theory seems, so far.




  • But what confuses me is, why does filtering work by creating a weighted sum of previous samples?




  • What intuition makes one think this can produce desired filtering effects?




  • It seems a bit unintuitive to me eventhough anyone can verify that summing delayed signals together does produce comb filtering. But desirable filtering? Why?




No comments:

Post a Comment

periodic trends - Comparing radii in lithium, beryllium, magnesium, aluminium and sodium ions

Apparently the of last four, $\ce{Mg^2+}$ is closest in radius to $\ce{Li+}$. Is this true, and if so, why would a whole larger shell ($\ce{...