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From: | Kevin Reid |
Subject: | Re: [Discuss-gnuradio] Time sinks out of sync after adding and removing noise in simple FSK simulation |
Date: | Thu, 14 Sep 2017 07:20:02 -0700 |
I recently decided to simulate an FSK modulation scheme with a constant source, a noice source and 2 time sinks. The first time sink is pre-modulation and the second is post-modulation. When I first start the simulation, both time sinks display the same waveform as expected. When I add a strong noise signal in real time via a GUI entry the post-modulation time sink displays a randomly changing waveform again, as expected. However, when I reduce the noise source to 0, the post-modulated sink stabilizes to match the pre-modulated sink except that it is translated arbitrarily to the left or right. this causes an arbitrary byte to be spit out when the bits are repacked.
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