1 files changed, 67 insertions, 0 deletions
diff --git a/gnuradio-core/src/python/gnuradio/blksimpl/psk.py b/gnuradio-core/src/python/gnuradio/blksimpl/psk.py
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index 0000000000..fdb6c9e693
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+++ b/gnuradio-core/src/python/gnuradio/blksimpl/psk.py
@@ -0,0 +1,67 @@
+#
+# Copyright 2005,2006 Free Software Foundation, Inc.
+# 
+# This file is part of GNU Radio
+# 
+# GNU Radio is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2, or (at your option)
+# any later version.
+# 
+# GNU Radio is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with GNU Radio; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+# 
+
+from math import pi, sqrt
+import cmath
+
+def make_constellation(m):
+    return [cmath.exp(i * 2 * pi / m * 1j) for i in range(m)]
+        
+# Common definition of constellations for Tx and Rx
+constellation = {
+    2 : make_constellation(2),           # BPSK
+    4 : make_constellation(4),           # QPSK
+    8 : make_constellation(8)            # 8PSK
+    }
+
+# -----------------------
+# Do Gray code
+# -----------------------
+# binary to gray coding
+binary_to_gray = {
+    2 : (0, 1),
+    4 : (0, 1, 3, 2),
+    8 : (0, 1, 3, 2, 7, 6, 4, 5)
+    }
+   
+# gray to binary
+gray_to_binary = {
+    2 : (0, 1),
+    4 : (0, 1, 3, 2),
+    8 : (0, 1, 3, 2, 6, 7, 5, 4)
+    }
+
+# -----------------------
+# Don't Gray code
+# -----------------------
+# identity mapping
+binary_to_ungray = {
+    2 : (0, 1),
+    4 : (0, 1, 2, 3),
+    8 : (0, 1, 2, 3, 4, 5, 6, 7)
+    }
+    
+# identity mapping
+ungray_to_binary = {
+    2 : (0, 1),
+    4 : (0, 1, 2, 3),
+    8 : (0, 1, 2, 3, 4, 5, 6, 7)
+    }