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ATOMS : Time Frequency Toolbox details
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Time Frequency Toolbox

Toolbox developed for the analysis of non-stationary signals using time-frequency distributions.
(14959 downloads for this version - 91710 downloads for all versions)
Holger Nahrstaedt
François Auger
Owner Organization
TU Berlin / FG Regelungssysteme
Steer Serge
Holger Nahrstaedt
Administrator Atoms
Clement David
Creation Date
October 6, 2018
Source created on
Scilab 6.0.x
Binaries available on
Scilab 6.0.x:
Linux 64-bit Windows 64-bit
Install command
--> atomsInstall("stftb")
            This Toolbox was ported from the Time-Frequency Toolbox

The toolbox contains numerous algorithms which implements various kind of
time-frequency analysis with a special emphasis on quadratic energy
distributions of the Cohen and affine classes, along with their version enhanced
by the reassignment method. The toolbox also includes signal generation
procedures, processing/post-processing routines (with display utilities) and a
number of demonstrations.

Here you will find some notes on time-frequency analysis:
(Take a look at Course notes, MATH 401/530, Chapter 3)

2.0.0 - sci_gateways rewritten for Scilab-6
         + Parameter checking improved 
         + Ctfrxxx and tfrxxx functions made equivalent when signal is a
           single vector
         + Ctfrrsp and tfrrsp modified to work with rectangular windows.
         + calling sequence of reassigned.c modified to add one more
           argument (Threshold)
         + tfrgrd, the Scilab sinc function is sin(x)/x while the Cstftb
            one is sin(%pi*x)/(%pi*x)
         + Ctfrbj, Ctfrbud when Nfreq==N and is odd
         + Chtl : the (1,1) element was not computed
      - triang, hamming, hanning, nutall, blackman, harris, barthann,
        papoulis windows definition changed in tftb_window and Cwindow
        according to the
      - Kaiser ans Nutbess windows added in Cwindow.
      - Hanna window (no definition found) replaced by power of Sine window

      - Matlab compatibility functions (mtlb_*) replaced by the Scilab
      - Help page examples verified and graphical outputs included
      - bug fixes

1.2.4 - tests improved
      - some functions are now in the moc-toolbox
      - small bugfixes

1.2.3 - plotting function is improved
      - rem is replaced by the internal scilab function modulo
      - mtlb_conv is replaced by conv
      - some bugfixes in the demos
      - 121 unit tests
      - the sci_gateway works under scilab 5.4

1.2.2 - Removing of memory leaks in sci_gateway (Thanks to Serge Steer)

1.2.1 - help structure is changed and Chapters are added

1.2 -  some bugs are removed
    -  sci_gateway added (Ctftb was ported to scilab)
    -  new demos

1.1.1 - some bugs are removed
1.1   - some bugs are removed
      - tftb_window can be plotted 
      - frspec and frpowerspec added            
Files (4)
[4.11 MB]
Source code archive

[4.84 MB]
Linux 64-bit binary for Scilab 6.0.x
Binary version for Linux 64 bits, Built by S. Steer
[7.43 MB]
Windows 64-bit binary for Scilab 6.0.x

[2.44 MB]
Miscellaneous file
Time frequency toolbox tutorial forgotten in binary distributions
News (0)
Comments (1)     Leave a comment 
Comment from Joel Nieto Gastón Coronel -- June 26, 2019, 02:34:49 PM    
Hi, the function pulstrain it does not work correctly
Answer from Joel Nieto Gastón Coronel -- June 26, 2019, 02:35:24 PM    
This answer has been deleted.
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