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[Discuss-gnuradio] Mistake in fmdet_cf_impl.cc:109?


From: Perper
Subject: [Discuss-gnuradio] Mistake in fmdet_cf_impl.cc:109?
Date: Thu, 11 Jul 2013 12:37:45 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130623 Thunderbird/17.0.7

Hello all,

I was reading the c++ code of FM demodulators in gnuradio and I
encountered this in fmdet_cf_impl.cc:109:

-------------------------------------
        Sdot = d_scl * (-S0+d_8*S1-d_8*S1+S4);
-------------------------------------

I don't know according to what principle this demodulator work exactly
but it doesn't seem to make too much sense to first add d_8*S1 and then
subtract it.

-- 
Best Regards,
Piotr Krysik




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