analog: adding frequency_modulator_fc to gr-analog, with QA and GRC.

1 files changed, 56 insertions, 0 deletions

diff --git a/gr-analog/python/qa_frequency_modulator.py b/gr-analog/python/qa_frequency_modulator.py
new file mode 100755
index 000000000..b673b3275
--- /dev/null
+++ b/gr-analog/python/qa_frequency_modulator.py
@@ -0,0 +1,56 @@
+#!/usr/bin/env python
+#
+# Copyright 2004,2007,2010,2012 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 analog_swig as analog
+import math
+
+def sincos(x):
+    return  math.cos(x) + math.sin(x) * 1j
+
+
+class test_frequency_modulator(gr_unittest.TestCase):
+
+    def setUp(self):
+        self.tb = gr.top_block()
+
+    def tearDown(self):
+        self.tb = None
+
+    def test_fm_001(self):
+        pi = math.pi
+        sensitivity = pi/4
+        src_data = (1.0/4, 1.0/2, 1.0/4, -1.0/4, -1.0/2, -1/4.0)
+        running_sum = (pi/16, 3*pi/16, pi/4, 3*pi/16, pi/16, 0)
+        expected_result = tuple([sincos(x) for x in running_sum])
+        src = gr.vector_source_f(src_data)
+        op = analog.frequency_modulator_fc(sensitivity)
+        dst = gr.vector_sink_c()
+        self.tb.connect(src, op)
+        self.tb.connect(op, dst)
+        self.tb.run()
+        result_data = dst.data()
+        self.assertComplexTuplesAlmostEqual(expected_result, result_data, 5)
+
+if __name__ == '__main__':
+    gr_unittest.run(test_frequency_modulator, "test_frequency_modulator.xml")
+