估计误差的方差 meaning in Chinese

variance of estimaion error

Some related res ults have been acquired after comparing these cdf with the theoretical capacity . in the fourth chapter , it was at first estimated all the channel coefficients by maximum likelihood estimation and minimum mean square error estimation method on the basis of the construction of the transmission frame and the mathematical model for the wireless mtmo system of channel estimation with training sequence
第四章首先基于训练序列估计的无线mimo传输帧结构和数学模型，分别使用最小均方误差估计法和最大似然估计法估计出了信道的各个系数，在小信噪比和大信噪比时，比较了两种估计方法的估计误差的方差。
State estimation used by least square algorithm is usually done at the condition of unknown of it " s statistic property . to make the estimate error least , this paper introduce weight function and use weight least square algorithm ( wls ) . the result of simulation shows that the precision of estimate result is highly enhanced and this method can satisfy the need of move and control of the power system
在不知道随机干扰信号统计特性的情况下，采用最小二乘法对电力系统的运行参数进行状态估计，为了使估计误差的方差矩阵最小，本文引入权函数使用加权最小二乘法，使估计结果的准确性大大提高，仿真结果显示，该方法完全能够满足电网运行和控制的要求。