我国的
通信技术领先世界,
技术的数学原理之一是著名的香农
公式,香农提出并严格证明了“在被高斯白噪声干扰的信道中,计算最大信息传送速率
的公式
=![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f5cc1eb0e382df45a9bf2db3163e84b.png)
)”,其中
是信道带宽(赫兹),S是信道内所传信号的平均功率(瓦),
是信道内部的高斯嗓声功率(瓦),其中
叫做信噪比.根据此公式,在不改变
的前提下,将信噪比从
提升至
,使得
大约增加了
,则
的值大约为( )(参考数据:
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47248d88a8876e1177cbd3ba43b11bea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47248d88a8876e1177cbd3ba43b11bea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9124f98bb9636eaa13869031aabb5586.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f5cc1eb0e382df45a9bf2db3163e84b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60c91fa27331e9958df48fd5633432e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91edc7e2d4811f5ea6c01284cf00393a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60c91fa27331e9958df48fd5633432e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91edc7e2d4811f5ea6c01284cf00393a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e9ba3f640f57c0cece089dfd19b4970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/358d1067c81a8f997a4d457088a769d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c67e5fddbe5add194e534d1f48f8773e.png)
A.![]() | B.1579 | C.3160 | D.2512 |
更新时间:2022-03-16 16:02:18
|
【知识点】 对数函数模型的应用(2)
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【推荐2】新冠疫情防控常态化,核酸检测应检尽检!核酸检测分析是用荧光定量
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