michael brown wrote:
>[In reply to my [MV's] evidently less-than-useful reply to his
>  question about low-pass filtering]
>
>Thanks for the reply.  It reinforces what I already understand about
>filtering electrical or electro-magnetic "waves".  I am looking for the
>definition as it applies to EE and sampled data.

One simple approach to digital low-pass filtering is just to do a
windowed average. That is, if you have a sequence of measurements
(samples) of a signal, then you average together every N of them
(like every pair, or every 10, or every 10000, as appropriate). In
this way, you average out the high-frequency "wiggles" and get just
the lower-frequency variations in the signal. By "average" I mean
exactly what you think I mean: add them up and divide by the number N.

>Also I hear/see the term
>"integrate" and am not completely clear as to what this means in the
>context
>of EE and data samples.

"Integrate" in the case of discrete samples just means "add 'em up".
Same as the averaging technique I mentioned above.

Michael V (still trying to be helpful...)

Thank you for reading my little posting.


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