<s>
The	O
BCJR	B-Error_Name
algorithm	I-Error_Name
is	O
an	O
algorithm	O
for	O
maximum	B-General_Concept
a	I-General_Concept
posteriori	I-General_Concept
decoding	O
of	O
error	B-Error_Name
correcting	I-Error_Name
codes	I-Error_Name
defined	O
on	O
trellises	O
(	O
principally	O
convolutional	B-Error_Name
codes	I-Error_Name
)	O
.	O
</s>
<s>
This	O
algorithm	O
is	O
critical	O
to	O
modern	O
iteratively-decoded	O
error-correcting	B-Error_Name
codes	I-Error_Name
,	O
including	O
turbo	B-Error_Name
codes	I-Error_Name
and	O
low-density	B-Error_Name
parity-check	I-Error_Name
codes	I-Error_Name
.	O
</s>
<s>
Based	O
on	O
the	O
trellis	B-Error_Name
:	O
</s>
<s>
framework	O
implements	O
BCJR	B-Error_Name
algorithm	I-Error_Name
for	O
forward	B-Error_Name
error	I-Error_Name
correction	I-Error_Name
codes	O
and	O
channel	O
equalization	O
in	O
C++	O
.	O
</s>
