
CHAPTER 7
Optimal Power
Allocation of
Cooperative
Transmission
Zhengguo Sheng, University of British Columbia, Canada
Bongjun Ko, IBM T. J. Watson Research Center, USA
7.1 INTRODUCTION
In previous chapters, we introduce the concept of cooperative region and av-
erage power ratio and prove that cooperative communication is effective in
enhancing performance of wireless networks. However, cooperative commu-
nication techniques typically assume uniform transmission power at every
node, including relays. Recall from Chapter 2, we assume that both source
and relay employ an identical transmission power
p. In this chapter, we pro-
pose a scheme to optimize the