Added BPSK constellation object.

2 files changed, 99 insertions, 0 deletions

diff --git a/gnuradio-core/src/python/gnuradio/blks2impl/Makefile.am b/gnuradio-core/src/python/gnuradio/blks2impl/Makefile.am
index f7e92442f..2a7f59176 100644
--- a/gnuradio-core/src/python/gnuradio/blks2impl/Makefile.am
+++ b/gnuradio-core/src/python/gnuradio/blks2impl/Makefile.am
@@ -29,6 +29,7 @@ grblkspythondir = $(grpythondir)/blks2impl
 grblkspython_PYTHON =		\
 	__init__.py		\
 	am_demod.py		\
+	bpsk.py			\
 	channel_model.py	\
 	dbpsk.py		\
 	dbpsk2.py		\
diff --git a/gnuradio-core/src/python/gnuradio/blks2impl/bpsk.py b/gnuradio-core/src/python/gnuradio/blks2impl/bpsk.py
new file mode 100644
index 000000000..222178abb
--- /dev/null
+++ b/gnuradio-core/src/python/gnuradio/blks2impl/bpsk.py
@@ -0,0 +1,98 @@
+#
+# 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 3, 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.
+# 
+
+"""
+BPSK modulation and demodulation.
+"""
+
+from math import pi, log
+from cmath import exp
+
+from gnuradio import gr, modulation_utils2
+from gnuradio.blks2impl.generic_mod_demod import generic_mod, generic_demod
+
+# Default number of points in constellation.
+_def_constellation_points = 2
+# Whether differential coding is used.
+_def_differential = True
+
+# /////////////////////////////////////////////////////////////////////////////
+#                           BPSK constellation
+# /////////////////////////////////////////////////////////////////////////////
+
+def bpsk_constellation(m=_def_constellation_points):
+    if m != _def_constellation_points:
+        raise ValueError("BPSK can only have 2 constellation points.")
+    return gr.constellation_bpsk()
+
+# /////////////////////////////////////////////////////////////////////////////
+#                           BPSK modulator
+# /////////////////////////////////////////////////////////////////////////////
+
+class bpsk_mod(generic_mod):
+
+    def __init__(self, constellation_points=_def_constellation_points,
+                 *args, **kwargs):
+
+        """
+	Hierarchical block for RRC-filtered BPSK modulation.
+
+	The input is a byte stream (unsigned char) and the
+	output is the complex modulated signal at baseband.
+
+        See generic_mod block for list of parameters.
+	"""
+
+        constellation = gr.constellation_bpsk()
+        if constellation_points != 2:
+            raise ValueError('Number of constellation points must be 2 for BPSK.')
+        super(bpsk_mod, self).__init__(constellation, *args, **kwargs)
+
+# /////////////////////////////////////////////////////////////////////////////
+#                           BPSK demodulator
+#
+# /////////////////////////////////////////////////////////////////////////////
+
+class bpsk_demod(generic_demod):
+
+    def __init__(self, constellation_points=_def_constellation_points,
+                 *args, **kwargs):
+
+        """
+	Hierarchical block for RRC-filtered BPSK modulation.
+
+	The input is a byte stream (unsigned char) and the
+	output is the complex modulated signal at baseband.
+
+        See generic_demod block for list of parameters.
+        """
+
+        constellation = gr.constellation_bpsk()
+        if constellation_points != 2:
+            raise ValueError('Number of constellation points must be 2 for BPSK.')
+        super(bpsk_demod, self).__init__(constellation, *args, **kwargs)
+
+#
+# Add these to the mod/demod registry
+#
+modulation_utils2.add_type_1_mod('bpsk', bpsk_mod)
+modulation_utils2.add_type_1_demod('bpsk', bpsk_demod)
+modulation_utils2.add_type_1_constellation('bpsk', bpsk_constellation)