An efficient algorithm for downlink cooperative transmission using joint power control and beamforming

A new algorithm based on Joint Power Control and Optimal Beamforming (JPCOB) has been developed in this work, whose major innovation is the cooperative transmission performed by the Base Stations involved in the system. It also provides minimum total transmission power but achieving a certain Quality of Service (QoS) at each mobile. Moreover, a computationally efficient implementation of the proposed algorithm has been developed and some simulations have been carried out. Results show that cooperative transmission has higher computational cost that non cooperative methods, but reconfiguration capability and handover management is implied in the new JPCOB algorithm equations, whereas non-cooperative methods must count on handover situations.