A Low Complexity Power Allocations Algorithm Fordf Mimo Swiptrelaying Systems

In this letter, the maximum achievable rate of downlink decode-and-forward (DF) multiple input and multiple output (MIMO) relaying system is investigated. In this system, a MIMO relay can simultaneously harvest power and transfer information. Power allocation over each spatial subchannel at the both base station (BS)-relay's links and relay-users' links, and the power splitting ratio (PSR) are optimized simultaneously. Based on the complicated form of optimality conditions, a novel power allocation algorithm is proposed which can find the optimal solution, too. Simulation results validate the efficiency of the proposed method in terms of solution optimality and convergence time.