Hi all, I've been doing some stuff with the pfb clock sync for GMSK (my AIS app again) and had a couple questions. First, a sanity check so you can tell me if I'm just nuts:
BT = 0.35 self.filtersections = 32 self.tapspersection = 20 self.clockrec_sps = 1 gain_mu = 0.03 self._samples_per_symbol = 250.0e3 / 9600.0 self.datafiltertaps = gr.firdes.gaussian(1, self._samples_per_symbol*self.filtersections, BT, self.tapspersection*self.filtersections) self.clockrec = gr.pfb_clock_sync_ccf(self._samples_per_symbol, gain_mu, self.datafiltertaps, self.filtersections, 0, 1.15, self.clockrec_sps) Am I constructing the filter correctly? If not, don't bother reading further, just tell me I'm a rube and move on. =) If not, increasing the output samples per symbol (self.clockrec_sps above) to 2 seems to cause the clock recovery to go off into the weeds. Any reason for this? Does the filter construction need to change when using multiple osps? --n
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