基于上下行对偶性的多用户MIMO下行链路鲁棒收发机设计

针对多用户多天线(MIMO)下行链路信道状态信息(CSI)非理想的条件，该文研究SINR平衡问题及功率最小化问题的收发机设计。在信道误差受限情况下，该文建立worst-case SINR上下行链路对偶性，并基于该对偶性，为两种鲁棒收发机提出新的设计策略。该策略避免了凸优化内点迭代算法，从而大大降低复杂度。仿真结果显示，所提算法与现有的凸优化算法性能一致。

Robust Transceiver Design Based on Uplink-downlink Duality for Downlink Multiuser MIMO Systems

This paper investigates transceiver design,that minimizes the transmit power and balances all SINRs,for multiuser Multi-Input Multi-Output(MIMO) systems in the presence of imperfect Channel State Information(CSI).A worst-case SINR uplink-downlink duality is established under bounded channel uncertainties,and with the aids of this duality,a new scheme is proposed for the robust transceiver design.This scheme obviates convex optimization which uses interior-point iterative algorithm,and thus the whole system complexity can be greatly reduced.Numerical results show that the proposed algorithms exhibit the same performance when compared with the exiting robust algorithm.