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Energy Efficient Cooperative Wireless Communication and Networks
book

Energy Efficient Cooperative Wireless Communication and Networks

by Zhengguo Sheng, Chi Harold Liu
November 2014
Intermediate to advanced content levelIntermediate to advanced
221 pages
6h 17m
English
CRC Press
Content preview from Energy Efficient Cooperative Wireless Communication and Networks
Joint Beamfor ming and Power Allocation 127
tive kth substream power allocation factors for user 1,user2, and the relay,
respectively.
The joint power allocation problem using sum-rate criterion
2
can be for-
mulated as
maximize
˜a
1
,...,˜a
M
,
˜
b
1
,...,
˜
b
M
,˜c
1
,...˜,c
M
1
2
M
k=1
log
2
1+
t
1,k
˜
b
k
˜c
k
t
2,k
˜a
k
+ t
3,k
˜
b
k
+ t
4,k
˜c
k
+ t
5,k
+
1
2
M
k=1
log
2
1+
u
1,k
˜a
k
˜c
k
u
2,k
˜a
k
+ u
3,k
˜
b
k
+ u
4,k
˜c
k
+ u
5,k
,
(9.16)
subject to
M
k=1
˜a
k
+
˜
b
k
c
k
P, ˜a
k
0,
˜
b
k
0, ˜c
k
0,
k
= {1,...,M}, (9.17)
where the constants
t
1,k
= λ
2
k
,t
2,k
= σ
2
1
β
k
λ
k
,t
3,k
= σ
2
1
α
k
λ
k
,
t
4,k
= σ
2
r
β
k
λ
k
,t
5,k
= σ
2
1
σ
2
r
α
k
β
k
,u
1,k
= t
1,k
= λ
2
k
,
u
2,k
= σ
2
2
β
k
λ
k
,u
3,k
= σ
2
2
α
k
λ
k
,u
4,k
= σ
2
r
α
k
λ
k
,
u
5,k
= σ
2
2
σ
2
r
α
k
β
k
k
=
M
j=1
|
ˆ
F
1
(j, k)|
2
k
=
M
j=1
|
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Publisher Resources

ISBN: 9781482238211