Then the real part of the sum is the cosine amplitude and the imaginary part is the sine amplitude.

那么总和的实部是余弦振幅，虚部是正弦振幅。

You can calculate these sine and cosine amplitudes separately or you can use Euler's formula so you only need to multiply your signal by one exponential term.

您可以分别计算这些正弦和余弦幅度，也可以使用欧拉公式，这样您只需将信号乘以一项指数项即可。