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‎mkdocs.yml‎

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enable_creation_date: false
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type: date
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copyright: Copyright © 2024 - 2026 Weitao JIANG.
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copyright: |
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markdown_extensions:
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‎notes/ss.md‎

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**筛选特性**：$f(t)\ast\delta(t-t_0)=f(t-t_0)$
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## Fourier 变换
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当代通信系统和信号处理技术的发展处处伴随着傅里叶变换的精心应用。作为一种变换方法，傅里叶变换启发引领了一系列变换方法的产生：陆续出现了短时傅里叶变换、Gabor 展开、Wigner-Wille 分布、小波变换、子带编码等众多研究课题。
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### 傅立叶级数
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周期信号可以表示为一系列三角函数的叠加，即傅立叶级数：
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$$
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f(t)=a_0+\sum_{n=1}^\infty\left[a_n\cos\left(\frac{2\pi nt}{T}\right)+b_n\sin\left(\frac{2\pi nt}{T}\right)\right]
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$$
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## 通信系统
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### 系统可实现性、佩里维纳准则

‎overrides/main.html‎

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‎site/404.html‎

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‎site/BigPhysics.html‎

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‎site/LinearAlgebra.html‎

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