| Line 3: | Line 3: | ||
1. <math>N = 2\,</math> | 1. <math>N = 2\,</math> | ||
| − | 2. <math>a_k = 0\,</math> for all | + | 2. <math>a_k = 0\,</math> for all |k|>1 |
3. <math>\sum_{n=0}^{3}x[n]=2</math> | 3. <math>\sum_{n=0}^{3}x[n]=2</math> | ||
Revision as of 10:55, 26 September 2008
Informations
1. $ N = 2\, $
2. $ a_k = 0\, $ for all |k|>1
3. $ \sum_{n=0}^{3}x[n]=2 $
4. $ \sum_{n=0}^{3}(-1)^nx[n]=5 $
Inspections
From first information, we can directly subtitute N into:
$ x[n]=\sum_{n=0}^{3}a_ke^{jk(2\pi/2)n}\, $
$ x[n]=\sum_{n=0}^{3}a_ke^{jk\pi n}\, $
