Low complexity scheduling in MIMO-OFDM systems with limited CSI

This paper deals with the designing of low complexity scheduling for multiuser MIMO-OFDM systems with limited CSI (channel state information). By using quantization technology, we can get semi-orthogonal region sets. Thus, the transmitter can carry out user scheduling by using the feedback CSI, which including channel direction information (CDI) and channel quality information (CQI) and the quantized semi-orthogonal channel region sets. Simulation results show that the presented scheduling algorithm can achieve a sum rate close to the full searching algorithms while with low complexity.