<s>
Pairwise	B-Algorithm
error	I-Algorithm
probability	I-Algorithm
is	O
the	O
error	O
probability	O
that	O
for	O
a	O
transmitted	O
signal	O
(	O
)	O
its	O
corresponding	O
but	O
distorted	O
version	O
(	O
)	O
will	O
be	O
received	O
.	O
</s>
<s>
Thus	O
,	O
we	O
introduce	O
the	O
symbol	O
error	O
probability	O
,	O
which	O
is	O
the	O
probability	O
that	O
the	O
demodulator	B-Device
will	O
make	O
a	O
wrong	O
estimation	O
of	O
the	O
transmitted	O
symbol	O
based	O
on	O
the	O
received	O
symbol	O
,	O
which	O
is	O
defined	O
as	O
follows	O
:	O
</s>
<s>
The	O
pairwise	B-Algorithm
error	I-Algorithm
probability	I-Algorithm
is	O
defined	O
as	O
the	O
probability	O
that	O
,	O
when	O
is	O
transmitted	O
,	O
is	O
received	O
.	O
</s>
