Merge branch 'master' of gnuradio.org:gnuradio

1 files changed, 142 insertions, 0 deletions

diff --git a/gr-digital/python/qa_pfb_clock_sync.py b/gr-digital/python/qa_pfb_clock_sync.py
new file mode 100755
index 000000000..06c8a60ba
--- /dev/null
+++ b/gr-digital/python/qa_pfb_clock_sync.py
@@ -0,0 +1,142 @@
+#!/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 as digital
+import random, cmath
+
+class test_pfb_clock_sync(gr_unittest.TestCase):
+
+    def setUp (self):
+        self.tb = gr.top_block ()
+
+    def tearDown (self):
+        self.tb = None
+
+    def test01 (self):
+        # Test BPSK sync
+        excess_bw = 0.35
+
+        sps = 4
+        loop_bw = cmath.pi/100.0
+        nfilts = 32
+        init_phase = nfilts/2
+        max_rate_deviation = 1.5
+        osps = 1
+        
+        ntaps = 11 * int(sps*nfilts)
+        taps = gr.firdes.root_raised_cosine(nfilts, nfilts*sps,
+                                            1.0, excess_bw, ntaps)
+
+        self.test = digital.pfb_clock_sync_ccf(sps, loop_bw, taps,
+                                               nfilts, init_phase,
+                                               max_rate_deviation,
+                                               osps)
+        
+        data = 1000*[complex(1,0), complex(-1,0)]
+        self.src = gr.vector_source_c(data, False)
+
+        # pulse shaping interpolation filter
+        rrc_taps = gr.firdes.root_raised_cosine(
+            nfilts,          # gain
+            nfilts,          # sampling rate based on 32 filters in resampler
+            1.0,             # symbol rate
+            excess_bw,       # excess bandwidth (roll-off factor)
+            ntaps)
+        self.rrc_filter = gr.pfb_arb_resampler_ccf(sps, rrc_taps)
+
+        self.snk = gr.vector_sink_c()
+
+        self.tb.connect(self.src, self.rrc_filter, self.test, self.snk)
+        self.tb.run()
+        
+        expected_result = 1000*[complex(-1,0), complex(1,0)]
+        dst_data = self.snk.data()
+
+        # Only compare last Ncmp samples
+        Ncmp = 100
+        len_e = len(expected_result)
+        len_d = len(dst_data)
+        expected_result = expected_result[len_e - Ncmp:]
+        dst_data = dst_data[len_d - Ncmp:]
+
+        #for e,d in zip(expected_result, dst_data):
+        #    print e, d
+        
+        self.assertComplexTuplesAlmostEqual (expected_result, dst_data, 1)
+
+
+    def test02 (self):
+        # Test real BPSK sync
+        excess_bw = 0.35
+
+        sps = 4
+        loop_bw = cmath.pi/100.0
+        nfilts = 32
+        init_phase = nfilts/2
+        max_rate_deviation = 1.5
+        osps = 1
+        
+        ntaps = 11 * int(sps*nfilts)
+        taps = gr.firdes.root_raised_cosine(nfilts, nfilts*sps,
+                                            1.0, excess_bw, ntaps)
+
+        self.test = digital.pfb_clock_sync_fff(sps, loop_bw, taps,
+                                               nfilts, init_phase,
+                                               max_rate_deviation,
+                                               osps)
+        
+        data = 1000*[1, -1]
+        self.src = gr.vector_source_f(data, False)
+
+        # pulse shaping interpolation filter
+        rrc_taps = gr.firdes.root_raised_cosine(
+            nfilts,          # gain
+            nfilts,          # sampling rate based on 32 filters in resampler
+            1.0,             # symbol rate
+            excess_bw,       # excess bandwidth (roll-off factor)
+            ntaps)
+        self.rrc_filter = gr.pfb_arb_resampler_fff(sps, rrc_taps)
+
+        self.snk = gr.vector_sink_f()
+
+        self.tb.connect(self.src, self.rrc_filter, self.test, self.snk)
+        self.tb.run()
+        
+        expected_result = 1000*[-1, 1]
+        dst_data = self.snk.data()
+
+        # Only compare last Ncmp samples
+        Ncmp = 100
+        len_e = len(expected_result)
+        len_d = len(dst_data)
+        expected_result = expected_result[len_e - Ncmp:]
+        dst_data = dst_data[len_d - Ncmp:]
+
+        #for e,d in zip(expected_result, dst_data):
+        #    print e, d
+        
+        self.assertComplexTuplesAlmostEqual (expected_result, dst_data, 1)
+
+
+if __name__ == '__main__':
+    gr_unittest.run(test_pfb_clock_sync, "test_pfb_clock_sync.xml")