Steve Blackwell wrote in news:506500000008000000095B0000-
1027480788000@exchange.ni.com:
> The signal input is made up of many 100HZ sine waves containing
> multiple phase shifts. I need to extract the individual sine waves at
> varying phase angles. The project will be used to balance model car
> motors.
If this is as I understand it, with one input signal containing the sum of
many sine waves of a variety of amplitudes at the same freqency, but
different phases, and this is the only information you have, then you task
is not possible. Convince yourself by adding a sine wave to a cosine wave
(i.e., sine with 90 deg phase) and try to recover the original signals.
Cannot be done. The reason is that when you add two sinusoids at the same
frequency, the result is a brand new sinusoid at the same frequency, of
some amplitude and phase. There are an infinate combination of sine waves
that will produce the same output, unless you have some more information.
If all the sine waves are of the same amplitude, then recovery of the
components MIGHT be possible, but I haven't worked it out
--
Scott
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