LF: SV: CRUNCH method

["Johan Bodin" <sm6lkm.jbeab@swipnet.se>]

Hi

> Decimation to lower the sampling rate is straightforward if wanted,
> just by taking one sample out of every N.
You'll need a decimation filter to keep aliases out if the original signal
has spectral components that are above the decimated Fs/2 (Nyquist!).
One way to accomplish this is to feed the original signal into the circular
buffer of a FIR filter of suitable design, at the original Fs, and then
compute the filter output at the decimated output Fs.

73
Johan SM6LKM