Hi,
do you know if the default PSK Demodulation block does any frecuency
correction or time recovery?
After running some tests, I have noticed that when I use a Channel Model
between PSK mod and PSK demod, I successfully decode my data even I
have a small frecuency offset or time offset (Epsilon)!
I believe so; see
gnuradio/gr-digital/python/digital/generic_mod_demod.py:
…
# symbol timing recovery with RRC data filter
taps = filter.firdes.root_raised_cosine(nfilts,
nfilts*self._samples_per_symbol,
1.0, self._excess_bw,
ntaps)
self.time_recov =
digital.pfb_clock_sync_ccf(self._samples_per_symbol,
self._timing_bw,
taps,
nfilts, nfilts//2,
self._timing_max_dev)
…
On Fri, Oct 31, 2014 at 3:16 PM, Daniel B. [email protected]
Thank you Karl!
On Saturday, November 1, 2014 12:25 AM, Karl Koscher
[email protected] wrote:
I believe so; see
gnuradio/gr-digital/python/digital/generic_mod_demod.py:
…
# symbol timing recovery with RRC data filter
taps = filter.firdes.root_raised_cosine(nfilts,
nfilts*self._samples_per_symbol,
1.0, self._excess_bw,
ntaps)
self.time_recov =
digital.pfb_clock_sync_ccf(self._samples_per_symbol,
self._timing_bw,
taps,
nfilts, nfilts//2,
self._timing_max_dev)
…
On Fri, Oct 31, 2014 at 3:16 PM, Daniel B. [email protected]
wrote:
Hi,