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Re: [Discuss-gnuradio] PSK Demod block

From: Daniel Batista
Subject: Re: [Discuss-gnuradio] PSK Demod block
Date: Fri, 31 Oct 2014 15:43:12 -0700

Thank you Karl!

On Saturday, November 1, 2014 12:25 AM, Karl Koscher <address@hidden> 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 Batista <address@hidden> wrote:
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)!

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