6 files changed, 280 insertions, 0 deletions
diff --git a/gr-digital/python/.gitignore b/gr-digital/python/.gitignore
new file mode 100644
index 000000000..604b402c5
--- /dev/null
+++ b/gr-digital/python/.gitignore
@@ -0,0 +1,3 @@
+/Makefile
+/Makefile.in
+/run_tests
diff --git a/gr-digital/python/Makefile.am b/gr-digital/python/Makefile.am
new file mode 100644
index 000000000..9db82b608
--- /dev/null
+++ b/gr-digital/python/Makefile.am
@@ -0,0 +1,39 @@
+#
+# Copyright 2011 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.
+# 
+
+include $(top_srcdir)/Makefile.common
+
+TESTS =
+EXTRA_DIST += run_tests.in
+
+if PYTHON
+TESTS += run_tests
+
+digitaldir = $(grpythondir)/digital
+
+noinst_PYTHON = \
+	qa_digital.py		\
+	qa_costas_loop_cc.py
+
+digital_PYTHON = \
+	__init__.py
+
+endif
diff --git a/gr-digital/python/__init__.py b/gr-digital/python/__init__.py
new file mode 100644
index 000000000..c1aed10f9
--- /dev/null
+++ b/gr-digital/python/__init__.py
@@ -0,0 +1,24 @@
+#
+# Copyright 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.
+# 
+
+# The presence of this file turns this directory into a Python package
+
+from digital_swig import *
diff --git a/gr-digital/python/qa_costas_loop_cc.py b/gr-digital/python/qa_costas_loop_cc.py
new file mode 100644
index 000000000..464534723
--- /dev/null
+++ b/gr-digital/python/qa_costas_loop_cc.py
@@ -0,0 +1,169 @@
+#!/usr/bin/env python
+#
+# Copyright 2011 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.
+# 
+
+from gnuradio import gr, blks2, gr_unittest
+import digital_swig
+import random, cmath
+
+class test_digital(gr_unittest.TestCase):
+
+    def setUp (self):
+        self.tb = gr.top_block ()
+
+    def tearDown (self):
+        self.tb = None
+
+    def test01 (self):
+        # test basic functionality by setting all gains to 0
+        alpha = beta = max_freq = min_freq = 0.0
+        order = 2
+        self.test = digital_swig.costas_loop_cc(alpha, beta,
+                                                max_freq, min_freq, 
+                                                order)
+        data = 100*[complex(1,0),]
+        self.src = gr.vector_source_c(data, False)
+        self.snk = gr.vector_sink_c()
+
+        self.tb.connect(self.src, self.test, self.snk)
+        self.tb.run()
+        
+        expected_result = data
+        dst_data = self.snk.data()
+        self.assertComplexTuplesAlmostEqual (expected_result, dst_data, 5)
+
+    def test02 (self):
+        # Make sure it doesn't diverge given perfect data
+        alpha = 0.1
+        beta = 0.25*alpha*alpha
+        max_freq = 0.25
+        min_freq = -0.25
+        order = 2
+        self.test = digital_swig.costas_loop_cc(alpha, beta,
+                                                max_freq, min_freq, 
+                                                order)
+        data = [complex(2*random.randint(0,1)-1, 0) for i in xrange(100)]
+        self.src = gr.vector_source_c(data, False)
+        self.snk = gr.vector_sink_c()
+
+        self.tb.connect(self.src, self.test, self.snk)
+        self.tb.run()
+
+        expected_result = data
+        dst_data = self.snk.data()
+
+        self.assertComplexTuplesAlmostEqual (expected_result, dst_data, 5)
+
+    def test03 (self):
+        # BPSK Convergence test with static rotation
+        alpha = 0.25
+        beta = 0.25*alpha*alpha
+        max_freq = 0.25
+        min_freq = -0.25
+        order = 2
+        self.test = digital_swig.costas_loop_cc(alpha, beta,
+                                                max_freq, min_freq, 
+                                                order)
+        rot = cmath.exp(0.2j) # some small rotation
+        data = [complex(2*random.randint(0,1)-1, 0) for i in xrange(100)]
+        
+        N = 40 # settling time
+        expected_result = data[N:]
+        data = [rot*d for d in data]
+
+        self.src = gr.vector_source_c(data, False)
+        self.snk = gr.vector_sink_c()
+
+        self.tb.connect(self.src, self.test, self.snk)
+        self.tb.run()
+
+        dst_data = self.snk.data()[N:]
+        
+        # generously compare results; the loop will converge near to, but
+        # not exactly on, the target data
+        self.assertComplexTuplesAlmostEqual (expected_result, dst_data, 2)
+
+    def test04 (self):
+        # QPSK Convergence test with static rotation
+        alpha = 0.25
+        beta = 0.25*alpha*alpha
+        max_freq = 0.25
+        min_freq = -0.25
+        order = 4
+        self.test = digital_swig.costas_loop_cc(alpha, beta,
+                                                max_freq, min_freq, 
+                                                order)
+        rot = cmath.exp(0.2j) # some small rotation
+        data = [complex(2*random.randint(0,1)-1, 2*random.randint(0,1)-1)
+                for i in xrange(100)]
+        
+        N = 40 # settling time
+        expected_result = data[N:]
+        data = [rot*d for d in data]
+
+        self.src = gr.vector_source_c(data, False)
+        self.snk = gr.vector_sink_c()
+
+        self.tb.connect(self.src, self.test, self.snk)
+        self.tb.run()
+
+        dst_data = self.snk.data()[N:]
+
+        # generously compare results; the loop will converge near to, but
+        # not exactly on, the target data
+        self.assertComplexTuplesAlmostEqual (expected_result, dst_data, 2)
+
+    def test05 (self):
+        # 8PSK Convergence test with static rotation
+        alpha = 0.25
+        beta = 0.25*alpha*alpha
+        max_freq = 0.25
+        min_freq = -0.25
+        order = 8
+        self.test = digital_swig.costas_loop_cc(alpha, beta,
+                                                max_freq, min_freq, 
+                                                order)
+        rot = cmath.exp(cmath.pi/16.0j) # some small rotation
+        const = blks2.psk.make_constellation(order)
+        data = [random.randint(0,7) for i in xrange(100)]
+        data = [rot*const[d] for d in data]
+        
+        N = 40 # settling time
+        expected_result = data[N:]
+        data = [rot*d for d in data]
+
+        self.src = gr.vector_source_c(data, False)
+        self.snk = gr.vector_sink_c()
+
+        self.tb.connect(self.src, self.test, self.snk)
+        self.tb.run()
+
+        dst_data = self.snk.data()[N:]
+
+        print expected_result
+        print dst_data
+        
+        # generously compare results; the loop will converge near to, but
+        # not exactly on, the target data
+        self.assertComplexTuplesAlmostEqual (expected_result, dst_data, 2)
+
+if __name__ == '__main__':
+    gr_unittest.run(test_digital, "test_digital.xml")
diff --git a/gr-digital/python/qa_digital.py b/gr-digital/python/qa_digital.py
new file mode 100755
index 000000000..97e35da56
--- /dev/null
+++ b/gr-digital/python/qa_digital.py
@@ -0,0 +1,35 @@
+#!/usr/bin/env python
+#
+# Copyright 2011 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.
+# 
+
+from gnuradio import gr, gr_unittest
+import digital_swig
+
+class test_digital(gr_unittest.TestCase):
+
+    def setUp (self):
+        self.tb = gr.top_block ()
+
+    def tearDown (self):
+        self.tb = None
+
+if __name__ == '__main__':
+    gr_unittest.run(test_digital, "test_digital.xml")
diff --git a/gr-digital/python/run_tests.in b/gr-digital/python/run_tests.in
new file mode 100644
index 000000000..b39e7e847
--- /dev/null
+++ b/gr-digital/python/run_tests.in
@@ -0,0 +1,10 @@
+#!/bin/sh
+
+# 1st parameter is absolute path to component source directory
+# 2nd parameter is absolute path to component build directory
+# 3rd parameter is path to Python QA directory
+
+@top_builddir@/run_tests.sh \
+    @abs_top_srcdir@/gr-digital \
+    @abs_top_builddir@/gr-digital \
+    @srcdir@