[問題] 兩個離散函數做convolution已回收
兩個離散函數
x[n]=1,3<=n<=8
0,otherwise
h[n]=1,4<=n<=15
0,otherwise
照理說做完convolution答案應該是
0 0 0 0 0 0 1 2 3 4 5 6 6 6 6 6 6 6 5 4 3 2 1
可是用MATLAB計算完卻得到
0 0 0 0 0 0 0 1 2 3 4 5 6 6 6 6 6 6 6 5 4 3 2 1
最前面多一個零
請問是哪裡有錯呢?
>> x=[0 0 0 1 1 1 1 1 1];
>> h=[0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1];
>> conv(x,h)
ans =
Columns 1 through 21
0 0 0 0 0 0 0 1 2 3 4 5
6 6 6 6 6 6 6 5 4
Columns 22 through 24
3 2 1
感謝指教~
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