Power Allocation Algorithm for Downlink Distributed Antenna System
Tianyu Du · Communications technology · 2013
This paper discusses the power allocation algorithm for downlink distributed antenna system.Firstly,a channel model including path loss,shadow fading and fast fading is set up.Then two kinds of common allocation algorithms are analyzed and a better power allocation based on water filling algorithm is proposed.Finally,different capacities of the algorithms are simulated.The simulation results indicate that the capacity of water filling algorithm could improve 1 bits/(s.Hz) and 0.5 bits/(s.Hz),as compared with those of equal power allocation and MRC power allocation algorithms respectly in power constraint system.The antemna system performance could be improved significantly.