非理想反馈MIMO-OFDM系统基于QoS保证的资源分配算法

QoS Guaranteed Adaptive Resource Allocation for MIMO-OFDM Systems with Imperfect Feedback

针对非理想反馈下多用户MIMO-OFDM系统资源分配问题,提出了一种以最大化系统和容量为目标的资源分配算法。考虑到实际系统中存在反馈时延和反馈误差影响系统性能,引入置信系数和等价方差来表征反馈CSI质量,在发射功率一定并满足用户QoS需求的情况下,充分利用多用户的分集增益,有效提高了系统和容量性能。

A dynamic resource allocation algorithm is proposed to maximize system throughput for multiuser MIMO-OFDM systems with imperfect feedback.Considering the existence of both feedback delay and feedback error in actual environment,the confidence coefficient and equivalent variance are used to indicate the feedback CSI quality.The proposed algorithm,which takes full advantage of the multiuser diversity under the constraint of transmit power and required QoS,can improve the system throughput efficiently.