该方法简单、实用，但需要获得信号的复数形式以及干扰极化 特性的先验知识。

This method is simple and effective, though it requires measurements of complex signal and apriori knowledge of the polarization characteristics of interference.

youdao

I think that book will give you all the basic principles you need in calculus of one variable, more variables, elementary complex numbers, maybe solving some problems with vectors and so on, which you're going to get into.

我想那本书会给你所需的所有基本知识,包括一元和多元微积分,简单的复数运算,可以解决一些与矢量有关的问题,而这正是你们将要学的

耶鲁公开课 - 基础物理课程节选