Stratospheric large-scale MIMO client beamforming method

A large-scale MIMO us terminal beam forming method for stratosphere comprise that following steps: step 1: a large-scale MIMO platform for stratosphere sends downlink pilot signal; step 2: a user maximizes the signal-pilot pollution power ratio by using the receiver correlation matrix; step 3, a needle solves the SPR maximization problem through a positive semi-definite relaxation method to obtaina user end beamforming vector; Step 4: adopting the beamforming vector obtained in step 3, the user performs beamforming operation in uplink pilot transmission and downlink data transmission. The invention has the advantages of low information exchange quantity, low processing complexity of the base station, wide application range, no additional feedback and the like. 本发明提供了种平流层大规模MIMO用户端波束成形方法，包括以下步骤：步骤：平流层大规模MIMO平台发送下行导频信号；步骤二：用户利用接收端相关性矩阵最大化信号-导频污染功率比；步骤三：针通过半正定松弛方法求解SPR最大化问题，得到用户端波束成形矢量；步骤四：采用步骤三中得到的波束成形矢量，用户在上行导频发送和下行数据发送中进行波束成形操作。本发明具有信息交互量低、基站处理复杂度低、适用范围广、无需增加额外反馈等优势。