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为降低受总功率约束基于最小和均方误差(sum-MSE)准则的多用户多输入多输出(MIMO)下行收发联合设计的计算复杂度,提出一种不需求解拉格朗日因子的收发联合设计方法.通过将总功率条件约束优化转化为无条件约束的优化问题,避免了求解非线性高阶方程来计算拉格朗日因子.仿真结果表明,相对于采用数值近似得到拉格朗日因子的收发联合设计方法,本算法在有效降低计算复杂度的同时,可显著提高系统的误码性能.
In order to reduce the computational complexity of joint multi-user multiple-input multiple-output (MIMO) downlink transmission and reception design based on the sum-MSE criterion with total power constraint, a novel transceiver that does not need to solve Lagrange factor The joint design method avoids solving the nonlinear high-order equation to calculate the Lagrange factor by transforming the constraint of total power condition into an unconstrained optimization problem.The simulation results show that the Lagrange factor is obtained relative to the numerical approximation Of the joint design method of sending and receiving, the algorithm can effectively reduce the computational complexity at the same time, can significantly improve the system’s error performance.