29 Nov
2007
29 Nov
'07
4:52 a.m.
On Wed, Nov 28, 2007 at 06:39:00PM +0100, Rémi Thébault wrote:
Is there a way to identify a frequency with quite high
precision without
computing a big spectrum analysis ?
- Do a series of short FFTs with a raised cosine window and L/2 overlap,
then use the evolution of the phase to find the exact frequency.
- One short FFT to find approximate frequency, then start a PLL
to track the signal.
Both can be very precise if implemented correctly.
--
FA
Lascia la spina, cogli la rosa.