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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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Gaussian MAC with
P
1
=
P
2
=
N
=
1
P_1=P_2=N=1
P
1
=
P
2
=
N
=
1
.
Compute the individual bound
R
1
≤
1
2
log
2
(
1
+
P
1
/
N
)
R_1 \le \tfrac12\log_2(1+P_1/N)
R
1
≤
2
1
lo
g
2
(
1
+
P
1
/
N
)
in bits.
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ln
log
( )
x
n
√
⌫
AC
7
8
9
+
4
5
6
−
1
2
3
×
0
.
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b
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