From 5b0fbc73d7e35b617df517a5182c00731f4c66d7 Mon Sep 17 00:00:00 2001
From: Tom Rondeau <trondeau@vt.edu>
Date: Sat, 6 Mar 2010 17:12:46 -0500
Subject: Using better defaults for new FLL implementation.
---
gnuradio-core/src/python/gnuradio/blks2impl/dbpsk2.py | 14 +++++++-------
1 file changed, 7 insertions(+), 7 deletions(-)
(limited to 'gnuradio-core/src/python/gnuradio/blks2impl/dbpsk2.py')
diff --git a/gnuradio-core/src/python/gnuradio/blks2impl/dbpsk2.py b/gnuradio-core/src/python/gnuradio/blks2impl/dbpsk2.py
index a5c5fa1642..7830874d10 100644
--- a/gnuradio-core/src/python/gnuradio/blks2impl/dbpsk2.py
+++ b/gnuradio-core/src/python/gnuradio/blks2impl/dbpsk2.py
@@ -38,7 +38,7 @@ _def_gray_code = True
_def_verbose = False
_def_log = False
-_def_freq_alpha = 4e-3
+_def_freq_alpha = 0.010
_def_costas_alpha = 0.1
_def_timing_alpha = 0.100
_def_timing_beta = 0.010
@@ -226,7 +226,7 @@ class dbpsk2_demod(gr.hier_block2):
self._samples_per_symbol = samples_per_symbol
self._excess_bw = excess_bw
self._freq_alpha = freq_alpha
- self._freq_beta = 0.25*self._freq_alpha**2
+ self._freq_beta = 0.10*self._freq_alpha
self._costas_alpha = costas_alpha
self._timing_alpha = timing_alpha
self._timing_beta = _def_timing_beta
@@ -308,11 +308,11 @@ class dbpsk2_demod(gr.hier_block2):
print "bits per symbol: %d" % self.bits_per_symbol()
print "Gray code: %s" % self._gray_code
print "RRC roll-off factor: %.2f" % self._excess_bw
- print "FLL gain: %.2f" % self._freq_alpha
- print "Costas Loop alpha: %.2f" % self._costas_alpha
- print "Costas Loop beta: %.2f" % self._costas_beta
- print "Timing alpha gain: %.2f" % self._timing_alpha
- print "Timing beta gain: %.2f" % self._timing_beta
+ print "FLL gain: %.2e" % self._freq_alpha
+ print "Costas Loop alpha: %.2e" % self._costas_alpha
+ print "Costas Loop beta: %.2e" % self._costas_beta
+ print "Timing alpha gain: %.2e" % self._timing_alpha
+ print "Timing beta gain: %.2e" % self._timing_beta
print "Timing max dev: %.2f" % self._timing_max_dev
def _setup_logging(self):
--
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