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A power allocation scheme for multi user multiple input multiple output orthogonal frequency division multiplexing (MIMO OFDM) systems with channel state information (CSI) on transmitter and receiver is presened. Multi user power allocation can be decoupled into single user power allocation throughout null space mapping of multi user channel and power allocation can be performed throughout spatial spectral water filling 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.
A power allocation scheme for multi user multiple input multiple output orthogonal frequency division multiplexing (MIMO OFDM) systems with channel state information (CSI) on transmitter and receiver is presened. Multi user power allocation can be decoupled into single user power allocation throughout null space mapping of multi user channel and power allocation can be performed throughout spatial spectral water filling for per user. To deal with more users in system and fading correlation, scheduling is performed to maintain the gain of power allocation. with low complexity. Simulation results validate the accuracy of theoretic analyzes.