From 51c504ebb1ca21c5f7071826c1af03e45e391a65 Mon Sep 17 00:00:00 2001
From: Daniel Estévez <daniel@destevez.net>
Date: Sun, 6 Jun 2021 11:25:57 +0200
Subject: digital: Add NRZI option to differential en/decoder
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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>
---
gr-digital/python/digital/bindings/diff_decoder_bb_python.cc | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
(limited to 'gr-digital/python/digital/bindings/diff_decoder_bb_python.cc')
diff --git a/gr-digital/python/digital/bindings/diff_decoder_bb_python.cc b/gr-digital/python/digital/bindings/diff_decoder_bb_python.cc
index f7fb6b0943..a5628fb372 100644
--- a/gr-digital/python/digital/bindings/diff_decoder_bb_python.cc
+++ b/gr-digital/python/digital/bindings/diff_decoder_bb_python.cc
@@ -14,7 +14,7 @@
/* BINDTOOL_GEN_AUTOMATIC(0) */
/* BINDTOOL_USE_PYGCCXML(0) */
/* BINDTOOL_HEADER_FILE(diff_decoder_bb.h) */
-/* BINDTOOL_HEADER_FILE_HASH(3814f3ba5b3a9425eae5611e1a4876ec) */
+/* BINDTOOL_HEADER_FILE_HASH(92f143bcb3f067b3cdf8292a75956d31) */
/***********************************************************************************/
#include <pybind11/complex.h>
@@ -41,6 +41,7 @@ void bind_diff_decoder_bb(py::module& m)
.def(py::init(&diff_decoder_bb::make),
py::arg("modulus"),
+ py::arg("nrzi") = ::gr::digital::DIFF_DIFFERENTIAL,
D(diff_decoder_bb, make))
--
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