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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
88 Energy-Efficient Cooperative Wireless Communication and Networks
Proof From (7.10), we can obtain the ratio for α =2
β =
1
K
m +1
4
1+
γ
m
2
1
d
r,d
d
s,d
,
where γ = d
α
r,d
/d
α
s,r
,m =(γ +
)
γ
2
+8γ)/2.Sinceβ 0, it is easy to
observe that the minimum value can be obtained as
1
2K
when d
r,d
/d
s,d
=0.
2
So the selected relay to achieve the minimum β will be as close as pos-
sible to the destination. We note that relays with the same distance
r to the
destination may not lead to the same
β, since the source-to-relay distances
may be different, and hence the optimal
p
. But we can use the probability
distribution function (6.15) to bound E
[β] as follows.
Theorem 7.6 The ...
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Publisher Resources

ISBN: 9781482238211