中文摘要：

详细介绍最小二乘方法的优缺点，并提出一种鲁棒性信号参数估计方法，这有助于学生对最小二乘方法的更全面理解，同时拓展学生对信号参数估计方法学习的视野。

英文摘要：

This paper intends to describe the merits and demerits of least squares method in detail, and to put forward a robust signal parameter estimation method, which hopefully helps students with a more thorough understanding on least squares method and broadening their view on signal parameter estimation study.