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带 通 信 号 的 抽 样 定 理<br />
频 带 信 号 (f L<br />
~ f H<br />
f L<br />
>> B 一 般 为 已 调 信 号 )<br />
B =f=<br />
H<br />
– f L<br />
,f H<br />
= nB +kB<br />
0 ≤ k < 1<br />
f S =2B(1+K/n), n 为 不 超 过 f L<br />
/B 的 最 大 正 整 数<br />
当 f H<br />
>> f L<br />
即 n >>1 时 f S<br />
=2B<br />
一 般 2B
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