This code (C) Eric Jacobsen, EF Data Corp. 1999 provided with his kind permission under the terms of the GNU Public Licence Agreement.
The files inttst.m and vectst.m are fairly configurable and contain some switches to do such things as turn noise on and off, etc. They are reasonably well commented and it is hoped that users adept at matlab will not have too much trouble using or adapting them.
inttst2.m uses Hanning.m from the Signal Processing Toolbox. If you do not have the Signal Processing Toolbox, the Hanning window is merely:
Hanning(n) = 0.5 * (1 - cos(2*pi*n/N))
where N is the length of the window.
The output rms error values for the frequency interpolation are in units of DFT bins.
February, 1999
EF Data Corp.
Tempe, AZ.
Note: Eric was Minister of Algorithms at Intel. Really.
Note: Eric is now at Abineau Communications.