作者lxy351 (kklin)
看板Electronics
標題[問題] 訊號與系統
時間Sun Mar 13 23:06:58 2011
Consider the system that generates the output signal y[n] = 2(u[n - 3]- u[n -
5])
if the input signal is x[n] =d [n -1]+d [n - 2] . Please determine (with
logical
explanations) whether the system is invertible, casual, stable, time
invariant, and
linear, where d [n] and u[n] are discrete-time signals representing,
respectively,
the unit impulse and the unit step.
想要請問這題h(n) 沒給我 該怎麼解? 還是可以靠以知Y跟X解出H?
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1F:→ kameng:h[n]只在LTI SYSTEM 才有的記號, 如果一個SYS不是LTI,給 03/13 23:15
2F:→ kameng:h[n]你也沒有意義 03/13 23:15
3F:→ lxy351:1恩恩 感謝回答 所以這樣就是直接討論y跟x有沒有以下性質? 03/13 23:32
4F:推 Ertkkpoo:h[n]不是指discrete-time下的訊號嗎?一定要LTI? 03/14 00:04
5F:推 jamtu:直接用課本上對於這些名詞的定義去做就好了 03/14 00:25
6F:→ mp19990920:y[n]是u[n]的組合,跟x[n]無關,直接用定義來討論即可 03/14 03:21
7F:推 acmonkey:y作z轉換 x作z轉換 除一下h就出來了 03/14 13:54