Chapter 01 — Fundamental Concepts

Signal Explorer 信号浏览器

Choose a signal type and adjust parameters. Toggle between continuous and discrete domains.
选择信号类型并调节参数，可切换连续与离散模式。

Time Transformations 时间变换运算

Apply x(t) → x(a·t + b): reversal, shift, and scaling.
变换 x(t) → x(a·t + b)：反折、平移与尺度变换。

Signal Operations 信号运算

Add or multiply two signals.
两个信号的加法与乘法。