[Numpy-discussion] Zoom fft code

[Neal Becker]

=?ISO-8859-1?Q?St=E9fan_van_der_Walt?= wrote:

> Hi Nadav
> 
> I recall that you posted an implementation yourself a while ago!
> 
> http://www.mail-archive.com/numpy-discussion@scipy.org/msg01812.html
> 
> Regards
> Stéfan
> 
> 2009/1/5 Nadav Horesh <nadavh@visionsense.com>:
>>
>>  I am looking for a zoom fft code. I found an old code by Paule Kinzle (a
>>  matlab code with a translation to numarray), but its 2D extension
>>  (czt1.py) looks buggy.
>>
>>  Nadav.

I was not aware that chirp-z transform can be used to efficiently compute DFT over a limited part of the spectrum.  I could use this.  Any references on this technique?