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LTE-A中多点协作传输(Co MP)技术可以通过多点协作发送、协作干扰消除等策略提高系统容量,特别是能增强小区边缘用户的接收信干噪比(SINR),改善通信质量,为此,针对多用户Co MP(MU-Co MP)中多流联合发送波束成形算法设计问题,以接收信号平均SINR最大化作为目标函数,通过计算信道状态信息估计值以及多用户干扰、噪声的统计自相关矩阵,构造正则矩阵束,将最大化接收SINR的联合传输预编码矩阵求解问题转化为正则矩阵束的广义特征向量求解问题,设计的权重矩阵既对准最大增益的波束方向,又能有效抑制用户及流间干扰.计算机仿真验证了该Co MP预编码矩阵联合设计算法能获得协作波束成形增益,且具有较强的鲁棒特性.
The Multi-Point Cooperative Transfer (CoMP) technology in LTE-A can increase system capacity through multiple coordinated sending and coordinated interference cancellation, and in particular, it can increase the SINR of the edge users in a cell and improve the communication quality. To solve this problem, a multi-stream co-transmit beamforming algorithm is designed for multi-user CoMP (MU-Co MP). The objective function is to maximize the average SINR of the received signal. By calculating the estimated channel state information and multi-user interference, Statistical autocorrelation matrix is constructed to construct a regular matrix beam. The problem of solving the joint transmission precoding matrix maximizing the received SINR is transformed into a generalized eigenvector of a regular matrix. The weight matrix of the design is not only aimed at the beam direction of the maximum gain, but also Which can effectively suppress users and interference.Computer simulation shows that the Co-MP precoding matrix joint design algorithm can obtain the cooperative beamforming gain and has strong robustness.