A kind of wireless transmission technology in the field of the two stage multi antenna multi-user limited feedback method, including: user terminal channel state information to quantify the channel quality information and get the low order channel direction information through the small size of the code, and the first phase of feedback; selecting the optimal base station user group as the user scheduling, and notify the user feedback scheduling high order channel direction information, and uses the low order channel direction information as the precoding matrix, to send data to the user scheduling; scheduling users get high order channel direction information from the large size of the code, and the second stage feedback base station according to the calculation of high order channel direction information scheduling user feedback optimized pre encoding matrix. Based on the optimization of pre encoding matrix to send data to the user scheduling. The invention has the characteristics of high transmission speed and low limited feedback, and can provide a specific realization method for the limited feedback strategy of the honeycomb cell of the third generation, the three generation and the fourth generation cellular mobile communication system.
【技术实现步骤摘要】
【技术保护点】
一种多用户多天线两阶段有限反馈方法，其特征在于，包括以下步骤： 步骤一：基站发送导频信号给用户端，用户端接收导频信号和信道状态信息； 步骤二：用户端将信道状态信息量化为信道质量信息并通过小尺寸码本得到低阶信道方向信息，并进行第一阶段反馈，将信道质量信息和低阶信道方向信息发送至基站； 步骤三：基站由用户反馈的信道质量信息、低阶信道方向信息进行用户调度，选取最优用户组作为调度用户，并通知调度用户反馈高阶信道方向信息，并使用低阶信道方向信息作为预编码矩阵，开始发送数据给调度用户； 步骤四：调度用户由大尺寸码本得到高阶信道方向信息，并进行第二阶段反馈，将高阶信道方向信息发送至基站，基站根据调度用户反馈的高阶信道方向信息计算得到优化预编码矩阵，并根据优化预编码矩阵发送数据至调度用户。
【技术特征摘要】
【专利技术属性】
技术研发人员：徐朝凯，吴幼龙，张宇，罗汉文，俞晖，
申请(专利权)人：上海交通大学，
类型：发明
国别省市：31[]
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