抗差估计的初值选择

CHOICE OF INITIAL VALUE FOR ROBUST ESTIMATION

对L1 范估计的平差值和LS估计的平差值作为抗差估计的初值进行了比较 ,指出在 ρ函数是严凸函数时 ,二者无明显的区别。因为LS估计简单且易于计算 ,因此建议用LS估计的平差值作为抗差估计的初值。

In this paper, the authors compare the L1 estimation value with LS estimation value when they are used as initial values of Robust estimation, and then point out when ρ function is a strictly convex function, there is no obvious difference between them. Because LS estimation is simple and calculated easily, we suggest using LS estimation value as initial value of Robust estimation.\;