<s>
Adjacent	B-Algorithm
Channel	I-Algorithm
Power	I-Algorithm
Ratio	I-Algorithm
(	O
ACPR	B-Algorithm
)	O
is	O
ratio	O
between	O
the	O
total	O
power	O
of	O
adjacent	O
channel	O
(	O
intermodulation	O
signal	O
)	O
to	O
the	O
main	O
channel	O
's	O
power	O
(	O
useful	O
signal	O
)	O
.	O
</s>
<s>
There	O
are	O
two	O
ways	O
of	O
measuring	O
ACPR	B-Algorithm
.	O
</s>
<s>
The	O
second	O
(	O
and	O
much	O
more	O
popular	O
method	O
)	O
is	O
to	O
find	O
the	O
ratio	O
of	O
the	O
output	O
power	O
in	O
a	O
smaller	O
bandwidth	B-Algorithm
around	O
the	O
center	O
of	O
carrier	O
to	O
the	O
power	O
in	O
the	O
adjacent	O
channel	O
.	O
</s>
<s>
The	O
smaller	O
bandwidth	B-Algorithm
is	O
equal	O
to	O
the	O
bandwidth	B-Algorithm
of	O
the	O
adjacent	O
channel	O
signal	O
.	O
</s>
<s>
ACPR	B-Algorithm
is	O
desired	O
to	O
be	O
as	O
low	O
as	O
possible	O
.	O
</s>
<s>
A	O
high	O
ACPR	B-Algorithm
indicates	O
that	O
significant	O
spectral	O
spreading	O
has	O
occurred	O
.	O
</s>
