diff options
| author | Elof Wecksell <elof@wecksell.se> | 2021-01-12 10:35:31 +0100 |
|---|---|---|
| committer | Martin Braun <martin@gnuradio.org> | 2021-01-29 03:31:03 -0800 |
| commit | b16924381c90e07d5d8cf5bc236c7dc48a0fd677 (patch) | |
| tree | e5fe0c4005af6c6f0a6178139439a478de0abacf /gr-digital/python/digital/qa_lfsr.py | |
| parent | 761b327c761e0596f72cbe9f63e510f1b36c4b47 (diff) | |
gr-digital: improved performance and capability of scramblers to 64-bit registers. Use __builtin_parity or volk popcnt. qa was also enhanced to detect errors.
Signed-off-by: Elof Wecksell <elof@wecksell.se>
Co-authored-by: Martin Braun <martin@gnuradio.org>
Diffstat (limited to 'gr-digital/python/digital/qa_lfsr.py')
| -rw-r--r-- | gr-digital/python/digital/qa_lfsr.py | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/gr-digital/python/digital/qa_lfsr.py b/gr-digital/python/digital/qa_lfsr.py index 0d7a2ccb94..e0db6a382b 100644 --- a/gr-digital/python/digital/qa_lfsr.py +++ b/gr-digital/python/digital/qa_lfsr.py @@ -10,9 +10,9 @@ import math - +import numpy as np from gnuradio import gr, gr_unittest, digital - +from gnuradio.digital.utils import lfsr_args class test_lfsr(gr_unittest.TestCase): @@ -25,7 +25,6 @@ class test_lfsr(gr_unittest.TestCase): def test_lfsr_001(self): reglen = 8 l = digital.lfsr(1, 1, reglen) - result_data = [] for i in range(4 * (reglen + 1)): result_data.append(l.next_bit()) @@ -33,6 +32,20 @@ class test_lfsr(gr_unittest.TestCase): expected_result = 4 * ([1, ] + reglen * [0, ]) self.assertFloatTuplesAlmostEqual(expected_result, result_data, 5) + def test_lfsr_002(self): + l = digital.lfsr(*lfsr_args(0b1,5,3,0)) + result_data = [l.next_bit() for _ in range(2*(2**5-1))] + + expected_result = [1, 0, 0, 0, 0, 1, 0, 1, 0, 1, 1, 1, 0, 1, 1, 0, + 0, 0, 1, 1, 1, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0]*2 + self.assertEqual(expected_result, result_data) + + seq1 = [l.next_bit() for _ in range(2**5-1)] + seq2 = [l.next_bit() for _ in range(2**5-1)] + self.assertEqual(seq1,seq2) + + res = (np.convolve(seq1,[1,0,1,0,0,1])%2) + self.assertTrue(sum(res[5:-5])==0,"LRS not generated properly") if __name__ == '__main__': gr_unittest.run(test_lfsr) |