A low complexity scheduling scheme based on multi-user beamforming in TD-LTE downlink

Multi-user multi-input and multi-output based on block diagonalization algorithm can eliminate the multi-user interference, but in fact the existence of the non-ideal factors lead to the interference can not be cancelled completely. In this paper we study the performance of the 3GPP long term evolution system based on BD algorithm and propose a low complexity multi-user scheduling scheme to reduce the mismatch between the CQI and the PostSINR. To get the tradeoff between the cell average capacity and the cell edge user capacity, proportional fairness scheduling is applied. Finally, simulation results with 3GPP LTE are presented using system level simulator.