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Re: [Discuss-gnuradio] FM demodulation of a real signal

From: Eric Blossom
Subject: Re: [Discuss-gnuradio] FM demodulation of a real signal
Date: Wed, 5 Apr 2006 10:34:02 -0700
User-agent: Mutt/1.5.9i

On Wed, Apr 05, 2006 at 03:44:59PM +0200, Matteo Campanella wrote:
> Hello, I am quite stuck at a problem, that is, how to demodulate a FM
> signal that is NOT in complex form using existing gnuradio blocks. The
> quadrature demodulator works only with complex input; I have tried to
> build an analytic signal out of my real one, but the result of the
> demodulation is then quite poor.
> Any suggestions?
> Matteo

Is your real signal at a non-zero IF?

If so, just multiply by a complex sinusoid to translate to baseband,
then use existing code path.  We come from the complex is simple
school of signal processing...

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