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Multiple-Access and Broadcast Channels
Many senders into one receiver, and one sender to many receivers: capacity regions rather than a single number.
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Binary adder MAC:
X
1
,
X
2
X_1,X_2
X
1
,
X
2
are independent and uniform on
{
0
,
1
}
\{0,1\}
{
0
,
1
}
and
Y
=
X
1
+
X
2
∈
{
0
,
1
,
2
}
Y=X_1+X_2\in\{0,1,2\}
Y
=
X
1
+
X
2
∈
{
0
,
1
,
2
}
.
Compute
H
(
Y
)
H(Y)
H
(
Y
)
in bits.
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x
n
√
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AC
7
8
9
+
4
5
6
−
1
2
3
×
0
.
a
b
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