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Update 注水定理的证明.md
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source/_posts/注水定理的证明.md

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@@ -124,6 +124,6 @@ $$p(f) = \max \{0,p^* - \sigma^2 (f)\}\tag{4.4}$$
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$$\int^{f_h}_{f_l} p(f)\mathrm{d}f = P\tag{4.5}$$
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  说了半天为什么叫注水?就是说把 $σ^2 (f)$ 当作碗,功率是水往里倒,分配功率的地方,噪 声功率加信号共功率(水平面)是平的,高出水面的噪声说明信道很差,不予分配功率。
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  说了半天为什么叫注水?就是说把 $σ^2 (f)$ 当作碗,功率是水往里倒,分配功率的地方,噪声功率加信号共功率(水平面)是平的,高出水面的噪声说明信道很差,不予分配功率。
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<img src="https://yanxuan.nosdn.127.net/83187fbceced4e9ef10311c04f17e904.png" alt="image.png" title="image.png" />

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