Efficient Spatial Scheduling and Precoding Algorithms for MC MU MIMO Systems

A transmission strategy that consists of a spatial scheduling algorithm and a precoding algorithm is developed for multi-carrier (MC) multi-user (MU) multiple-input multiple-output (MIMO) systems. The scheduling algorithm, called efficient multi-carrier ProSched (EMC-ProSched), adopts a novel scheduling metric that is able to efficiently perform the user selection for a multi-carrier system. The precoding algorithm, called low complexity coordinated beamforming (LoCCoBF), is developed to achieve a high capacity in the scenarios where the number of the transmit antennas at the base station is smaller or equal to the total number of receive antennas at the user terminals with a low complexity. A system-level simulator is then developed based on the IEEE 802.11ac standard and the simulation results indicate that a promising performance can be achieved by employing the proposed transmission strategy.