diff options
| author | Tom <trondeau@vt.edu> | 2009-10-06 10:24:38 -0700 |
|---|---|---|
| committer | Tom <trondeau@vt.edu> | 2009-10-06 10:24:38 -0700 |
| commit | eee064ca72cbc9779eaae2f20e18f74ff7925574 (patch) | |
| tree | 7b675e887faa17a6732e0fc45e24c2cb973b9a41 /gnuradio-core/src/python/gnuradio/blks2impl/dbpsk.py | |
| parent | 28bcffdea069764716a769eb3e344c748bc705f6 (diff) | |
Using PFB clock recovery for testing
Diffstat (limited to 'gnuradio-core/src/python/gnuradio/blks2impl/dbpsk.py')
| -rw-r--r-- | gnuradio-core/src/python/gnuradio/blks2impl/dbpsk.py | 40 |
1 files changed, 30 insertions, 10 deletions
diff --git a/gnuradio-core/src/python/gnuradio/blks2impl/dbpsk.py b/gnuradio-core/src/python/gnuradio/blks2impl/dbpsk.py index 3147bfa2ab..ac2e9323fb 100644 --- a/gnuradio-core/src/python/gnuradio/blks2impl/dbpsk.py +++ b/gnuradio-core/src/python/gnuradio/blks2impl/dbpsk.py @@ -255,16 +255,34 @@ class dbpsk_demod(gr.hier_block2): self._mm_omega = self._samples_per_symbol self._mm_gain_omega = .25 * self._mm_gain_mu * self._mm_gain_mu self._costas_beta = 0.25 * self._costas_alpha * self._costas_alpha - fmin = -0.1 - fmax = 0.1 + fmin = -0.25 + fmax = 0.25 - self.receiver=gr.mpsk_receiver_cc(arity, 0, - self._costas_alpha, self._costas_beta, - fmin, fmax, - self._mm_mu, self._mm_gain_mu, - self._mm_omega, self._mm_gain_omega, - self._mm_omega_relative_limit) - + #self.receiver=gr.mpsk_receiver_cc(arity, 0, + # self._costas_alpha, self._costas_beta, + # fmin, fmax, + # self._mm_mu, self._mm_gain_mu, + # self._mm_omega, self._mm_gain_omega, + # self._mm_omega_relative_limit) + + self.clock_recov = gr.costas_loop_cc(self._costas_alpha, + self._costas_beta, + fmax, fmin, arity) + if 0: + self.time_recov = gr.clock_recovery_mm_cc(self._mm_omega, + self._mm_gain_omega, + self._mm_mu, + self._mm_gain_mu, + self._mm_omega_relative_limit) + else: + nfilts = 8 + ntaps = nfilts*ntaps + taps = gr.firdes.root_raised_cosine( + nfilts, 1.0, 0.25/nfilts, self._excess_bw, ntaps) + self.time_recov = gr.pfb_clock_sync_ccf(self._mm_omega, + self._mm_gain_mu, + taps, nfilts) + # Do differential decoding based on phase change of symbols self.diffdec = gr.diff_phasor_cc() @@ -288,7 +306,9 @@ class dbpsk_demod(gr.hier_block2): self._setup_logging() # Connect and Initialize base class - self.connect(self, self.pre_scaler, self.agc, self.rrc_filter, self.receiver, + self.connect(self, self.pre_scaler, self.agc, #self.rrc_filter, self.receiver, + #self.clock_recov, + self.time_recov, self.diffdec, self.slicer, self.symbol_mapper, self.unpack, self) def samples_per_symbol(self): |