#
-# Copyright 2005,2006,2007 Free Software Foundation, Inc.
+# Copyright 2005,2006,2007,2009 Free Software Foundation, Inc.
#
# This file is part of GNU Radio
#
arity = pow(2,self.bits_per_symbol())
# Automatic gain control
- scale = (1.0/16384.0)
- self.pre_scaler = gr.multiply_const_cc(scale) # scale the signal from full-range to +-1
- #self.agc = gr.agc2_cc(0.6e-1, 1e-3, 1, 1, 100)
- self.agc = gr.feedforward_agc_cc(16, 2.0)
+ #scale = (1.0/16384.0)
+ #self.pre_scaler = gr.multiply_const_cc(scale) # scale the signal from full-range to +-1
+ self.agc = gr.agc2_cc(0.6e-1, 1e-3, 1, 1, 100)
+ #self.agc = gr.feedforward_agc_cc(16, 2.0)
# RRC data filter
ntaps = 11 * samples_per_symbol
# symbol clock recovery
if not self._mm_gain_mu:
self._mm_gain_mu = 0.1
-
+
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._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)
+
# Do differential decoding based on phase change of symbols
self.diffdec = gr.diff_phasor_cc()
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.agc, self.rrc_filter, self.receiver,
self.diffdec, self.slicer, self.symbol_mapper, self.unpack, self)
def samples_per_symbol(self):