README change

1 files changed, 83 insertions, 0 deletions

diff --git a/gr-blocks/python/qa_rms.py b/gr-blocks/python/qa_rms.py
new file mode 100644
index 000000000..f3386668a
--- /dev/null
+++ b/gr-blocks/python/qa_rms.py
@@ -0,0 +1,83 @@
+#!/usr/bin/env python
+#
+# Copyright 2013 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 blocks_swig as blocks
+import math
+
+def sig_source_f(samp_rate, freq, amp, N):
+    t = map(lambda x: float(x)/samp_rate, xrange(N))
+    y = map(lambda x: amp*math.cos(2.*math.pi*freq*x), t)
+    return y
+
+def sig_source_c(samp_rate, freq, amp, N):
+    t = map(lambda x: float(x)/samp_rate, xrange(N))
+    y = map(lambda x: amp*math.cos(2.*math.pi*freq*x) + \
+                1j*amp*math.sin(2.*math.pi*freq*x), t)
+    return y
+
+class test_rms(gr_unittest.TestCase):
+
+    def setUp(self):
+        self.tb = gr.top_block()
+
+    def tearDown(self):
+        self.tb = None
+
+    def test_ff(self):
+        amp = 2
+        src_data = sig_source_f(1, 0.01, amp, 200)
+        N = 750000
+
+        expected_data = amp/math.sqrt(2.0)
+
+        src = gr.vector_source_f(src_data, True)
+        head = gr.head(gr.sizeof_float, N)
+        op = blocks.rms_ff(0.0001)
+        dst = gr.vector_sink_f()
+
+        self.tb.connect(src, head, op, dst)
+        self.tb.run()
+
+        dst_data = dst.data()
+        self.assertAlmostEqual(dst_data[-1], expected_data, 4)
+
+    def test_cf(self):
+        amp = 4
+        src_data = sig_source_c(1, 0.01, amp, 200)
+        N = 750000
+
+        expected_data = amp
+
+        src = gr.vector_source_c(src_data, True)
+        head = gr.head(gr.sizeof_gr_complex, N)
+        op = blocks.rms_cf(0.0001)
+        dst = gr.vector_sink_f()
+
+        self.tb.connect(src, head, op, dst)
+        self.tb.run()
+
+        dst_data = dst.data()
+        self.assertAlmostEqual(dst_data[-1], expected_data, 4)
+
+if __name__ == '__main__':
+    gr_unittest.run(test_rms, "test_rms.xml")