fixed typo in beta value for qpsk demod

git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@4011 221aa14e-8319-0410-a670-987f0aec2ac5

diff --git a/gnuradio-core/src/python/gnuradio/blksimpl/dqpsk.py b/gnuradio-core/src/python/gnuradio/blksimpl/dqpsk.py
index 0563840ff051110d43b99c9d46786da0731b3422..70024f1e98da3ec1391d5a4bad53030927dc0f04 100644 (file)
--- a/gnuradio-core/src/python/gnuradio/blksimpl/dqpsk.py
+++ b/gnuradio-core/src/python/gnuradio/blksimpl/dqpsk.py
@@ -245,7 +245,7 @@ class dqpsk_demod(gr.hier_block):
         costas_order = 4        
         # The value of beta is now set to be underdamped; this value can have a huge impact on the
         # performance of QPSK. Set to 0.25 for critically damped or higher for underdamped responses.
-        beta = .5 0 * self._costas_alpha * self._costas_alpha
+        beta = .35 * self._costas_alpha * self._costas_alpha
         self.costas_loop = gr.costas_loop_cc(self._costas_alpha, beta, 0.02, -0.02, costas_order)
 
         # RRC data filter