Hi, Eric and Matt
I still can't understand the question I asked in July
26th's email. Hope you could take a look at the email
titled "confusion about set_rx_freq()".
My understanding is, if we get a "reversed version" of
the spectrum, we eventually get the "conjugate
version" of the signal in time domain, that is, I
channel remains the same, Q channel is reversed. So
in "gr_quadrature_demod_cf", when we use "arg(in[i] *
conj (in[i-1]))" to approximate the frequency, we
shouldn't get the same thing. Do I make any mistakes
here?
However, in Matt's email on Feb, 16th, Matt said,
"
1 - 0.765625 = .234375
.234375 * 64 MHz = 15 MHz
Since we had to do that "reflection", the spectrum is
reversed. This isn't a
problem for FM, but needs to be taken into account for
most modulations.
Matt
"
I wonder why it's not a problem for FM??
Thank you very much, looking forward to your reply
Sachi
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