基于块对角化的最小均方误差矢量预编码
发布时间:2018-11-15 23:36
【摘要】:针对多用户多输入多输出下行链路系统的预编码问题,提出使用块对角化处理获得具有块对角化结构的等价信道矩阵,并基于等价信道推导收发信号的均方误差,通过最小化均方误差分别求解扰动矢量的两个部分,即扩展星座图的扰动矢量和残余干扰矢量,从而获得发射端信号和预编码矩阵.仿真表明,提出方法的误码率性能优于传统的对角化算法、块对角化迫零准则矢量预编码算法、正则块对角化预编码算法及其改进算法.
[Abstract]:In order to solve the precoding problem of multi-user multi-input and multi-output downlink system, an equivalent channel matrix with block diagonalization structure is obtained by block diagonalization, and the mean square error of the transceiver signal is derived based on the equivalent channel. Two parts of the disturbance vector are solved by minimizing the mean square error, that is, the disturbance vector of the extended constellation diagram and the residual interference vector, so as to obtain the transmitter signal and the precoding matrix. Simulation results show that the proposed method has better BER performance than the traditional diagonalization algorithm, block diagonalization criterion vector precoding algorithm, regular block diagonalization precoding algorithm and its improved algorithm.
【作者单位】: 上海海事大学信息工程学院;上海交通大学电子工程系;
【基金】:国家自然科学基金(61271283,61401270) 上海市教委科研创新项目(14YZ113) 上海海事大学校基金(20130460,20130479)
【分类号】:TN919.3
[Abstract]:In order to solve the precoding problem of multi-user multi-input and multi-output downlink system, an equivalent channel matrix with block diagonalization structure is obtained by block diagonalization, and the mean square error of the transceiver signal is derived based on the equivalent channel. Two parts of the disturbance vector are solved by minimizing the mean square error, that is, the disturbance vector of the extended constellation diagram and the residual interference vector, so as to obtain the transmitter signal and the precoding matrix. Simulation results show that the proposed method has better BER performance than the traditional diagonalization algorithm, block diagonalization criterion vector precoding algorithm, regular block diagonalization precoding algorithm and its improved algorithm.
【作者单位】: 上海海事大学信息工程学院;上海交通大学电子工程系;
【基金】:国家自然科学基金(61271283,61401270) 上海市教委科研创新项目(14YZ113) 上海海事大学校基金(20130460,20130479)
【分类号】:TN919.3
【共引文献】
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