Throughput maximization transmission control scheme for MIMO systems

In space division multiplexing, the input data symbols are transmitted from multiple transmit antennas at the transmitter, respectively, and the output data symbols are extracted by the signal processing at the receiver. In recent wireless communications, the environments that the number of transmit antennas is larger than that of receive antennas often exist. Under such environments, the MIMO system that transmits independent data streams from each transmit antenna simultaneously cannot separate the received signals, and the signal quality deteriorates largely. Therefore, we need a scheme that attains high quality and high throughput data transmission under such environments. We propose a throughput maximization transmission control scheme for MIMO systems which selects a transmission scheme (a set of transmit antennas, modulation schemes, and coding rates) with maximum throughput, based on signal to interference and noise ratio (SINR). We show that the proposed transmission control scheme attains high throughput by computer simulation.