Power allocation for MIMO2OFDM systems with multi2user decoupling and schedul ing

Abstract : A power allocation scheme for multi2user multiple2input multiple2output orthogonal frequency division multiplexing (MI2 MO2OFDM) systems with channel state information (CSI) on transmitter and receiver is presened. Multi2user power allocation can be decoupled into single user power allocation throughout null space mapping of multi2user channel and power allocation can be per2 formed throughout spatial2spectral water2filling for per user. To deal with more users in system and fading correlation , scheduling is performed to maintain the gain of power allocation. The proposed scheme can substantially improve system’s spectral efficiency with low complexity. Simulation results validate the accuracy of theoretic analyses.

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