[sdiy] ot: help! Dolph-Tchebycheff window

[houshu at muj.biglobe.ne.jp]

Hello Martin,

The following Japanese site with a Matlab program may be helpful.
Comments are very simple.  Please use a translation site.

  http://www-antenna.pe.titech.ac.jp/~hira/hobby/edu/em/array/chebyshev/math_html/

Best,

Sam Hoshuyama
Kawasaki Japan

> Some people say that the internet is a pile of sh*t.
> I generally do not aggree, but in this case they are right!
> 
> I'm looking for a correct procedure to compute the so called
> Dolph-Tchebycheff Window.
> So far, all the programs , algorithms and graphs proved to
> be wrong, since the spectrum of the computed window
> did not have any equi ripple properties. Sometimes
> this was very evident from the pictures in the particular
> paper. People seem not to notice!
> Very often the initial window spectrum is derived in the right
> way. But all of the back transforms into time domain are faulty.
> 
> So , please, could anyone of you good people point
> me to a correct derivation/program code?
> 
> 
> Martin Czech
> 
> CAD/CAE Library Group
> Micronas GmbH
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>  
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>