我想在论文中写“滤波器的 $Z$ 变换”。最适合表示 $Z$ 的符号是什么?
答案1
\documentclass{article}
\begin{document}
The bilateral or two-sided Z-transform of a discrete-time signal $x[n]$ is the formal power series $X(z)$ defined as
\[
X(z)=\mathcal{Z}\{x[n]\}=\sum_{n=-\infty}^{\infty}x[n]z^{-n}
\]
where $n$ is an integer and $z$ is, in general, a complex number:
\end{document}