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Signed-off-by: cmrincon <cmrincon611@hotmail.com>
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This adds an option to the differential encoder an decoder blocks
to perform NRZI encoding and decoding. NRZI only makes sense with
a modulus of 2, so the blocks constructors will throw and exception
if passed nrzi = true and a modulus different from 2.
The GRC blocks handle this by hiding the modulus field if the user
selects NRZI encoding.
A new unit test for the NRZI version of the blocks is added. Besides
checking that encode plus decode gives the original, this test also
compares the C++ implementation results against a Numpy implementation.
Additionally, a faster implementation of differential encoding/
decoding for modulus 2 is included here.
Signed-off-by: Daniel Estévez <daniel@destevez.net>
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This patch removes a crc32 utility that used to be used in our CRC32
blocks, but no longer is. Right now, all this does is expose a generic
CRC32 function to the user (both via Python and C++), but there are
enough other libraries that let the user do that. Therefore, we'll
remove this.
Signed-off-by: Martin Braun <martin@gnuradio.org>
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Signed-off-by: Josh Morman <jmorman@perspectalabs.com>
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Signed-off-by: Josh Morman <jmorman@perspectalabs.com>
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