[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
## Re: why does invert fft not work?

**From**: |
Jordi Gutiérrez Hermoso |

**Subject**: |
Re: why does invert fft not work? |

**Date**: |
Wed, 24 Nov 2010 21:27:04 -0600 |

On 24 November 2010 20:26, <address@hidden> wrote:
>* for example:*
>* s=sqrt(2)*cos(2*pi()*[1:1000]/1000);*
>* sn=s+.001*sqrt(1000/2)*randn(1,1000);*
>* b=sqrt(2)*fft(sn)/1000;*
>
>* invoking*
>* snew=ifft(b);*
>
>* does NOT reproduce sn or s in any way shape or form!*
Well, you're not doing ifft(fft(sn)), so I don't see why you expect
that to be sn, and sn and s are completely unrelated. I'm confused
what the goal is.n
- Jordi G. H.