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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
122 Energy-Efficient Cooperative Wireless Communication and Networks
the relay; that is, user i transmits F
i
x
i
where F
i
C
M×M
is the transmit
beamforming matrix of user
i and x
i
C
M×1
is the information bearing
vector of user
i with normalized covariance (i.e., E[x
i
x
H
i
]=I
M
). The de-
sign of
F
i
will be discussed in the following section. The signal observed by
the relay can be expressed as
r = H
1
F
1
x
1
+ H
2
F
2
x
2
+ n
r
, (9.1)
where H
i
C
M×M
is the channel from user i to the relay and n
r
C
M×1
is the noise vector observed by the relay. In the second time slot, the relay
broadcasts the linear precoded observation to both users, that is, Wr where
W C
M×M
is the joint
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Publisher Resources

ISBN: 9781482238211