Power allocation and distributed beamforming optimization in relay-assisted multiuser communications
Duy H. N. Nguyen, Ha H. Nguyen · 2009
This paper considers power allocation and distributed beam-forming optimization in a multiuser multi-relay network. Under the constraint on the total relay power, we investigate two resource allocation problems, namely the sum-rate maximization and minimum-rate maximization. Although both problems are not readily expressed in a convex form, a change in variables transforms the problems into standard optimization problems, which then can be solved efficiently. In addition, via dual decomposition, two algorithms are proposed to solve the two problems in a distributed fashion.