Re: LF: Smart noise cancelling?!?

[Paul Nicholson <vlf0403@abelian.org>]

Andy wrote:

> But surely, when narrowband filtering is in place - as any
> narrow band mode will of necessity be doing internally - any
> wideband non Gaussian or bursty noise when applied to this
> narrow filter will eventually become Gaussian IN THAT BANDWIDTH

Was about to chip in with the same point but you beat me.

> A mathematician could probably prove that any random non Gaussian
> signal if filtered sufficiently narrow in comparison to itsnature,
> would end up Gaussian in the filtered bandwidth.

I guess, a consequence of the central limit theorem. After all, the
FFT is just a sum of lots of time domain samples.

--
Paul Nicholson
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