Low Complexity Multi-user Scheduling with Quantization

摘要

This paper deals with the design and analysis user scheduling algorithm in multi-antenna broadcast (downlink) systems with limited feedback of channel state information. By using quantized codebook, the channel direction can be divided into serval unoverlapped regions. Based on the quantized channel regions, we can get semi-orthogonal region sets by setting semi-orthogonal threshold. Simulation results show that the achieved sum rate by the presented algorithm can achieve nearly optimal sum rate close to the full searching algorithms while with much lower complexity than that of the previous algorithms.