作者sarah21 (male)
看板comm_and_RF
標題[問題] discrete signal 的 energy
時間Mon May 11 20:10:18 2009
The total energy in a discrete - time signal x[n] over the time interval
n1 ≦ n ≦ n2 is defined as
n2 2
Σ |x[n]|
n=n1
and dividing by the number of points in the interval,
n2-n1+1, yields the
average power over the interval.
為什麼是n2-n1+1
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◆ From: 59.121.143.114
※ 編輯: sarah21 來自: 59.121.143.114 (05/11 20:15)
1F：推 baoerking:可以問一下，你覺得是多少呢？ 140.113.28.194 05/11 20:37
2F：→ sarah21:連續信號是用t2-t1, 為什麼不是n2-n1就好 59.121.143.114 05/11 20:41
※ 編輯: sarah21 來自: 59.121.143.114 (05/11 20:49)
3F：→ emitter:種樹問題？ XDD140.113.199.246 05/11 21:00
4F：→ sarah21:對吼..他是要算有幾根樹 59.121.143.114 05/11 21:16
5F：推 baoerking:ok，那表示你知為了吧！ 140.113.28.194 05/11 21:29
6F：推 joeism:"defined as" 這是定義~ 140.113.13.71 05/12 12:53