DiscreteTFDsCopyright (c) 1997, 1998, 1999 Jeffrey C. O'Neill (jeffo@bu.edu)Copyright (c) 1998, 1999 Boston UniversityCopyright (c) 1997, 1998 L'Ecole Normale Superieure de LyonCopyright (c) 1997 The Regents of the University of MichiganAll Rights Reservedsee DiscreteTFDs/CopyrightThis is a collection of Matlab files for time-frequencyanalysis.  However, if you don't have Matlab, you can try Octave	http://www.che.wisc.edu/octave/or SciLab	http://www-rocq.inria.fr/scilab/These programs are either a result of my research or something that Ifound useful enough to spend the time to implement.  Included are: arigorous implementation of time-frequency distributions (Cohen class),some quartic time-frequency distributions, chirplet decomposition basedon maximum likelihood estimation, fractional Fourier transform,time-varying filtering, and other useful little utilities.  Thereisn't a manual, but you can find details in my papers	http://mdsp.bu.edu/jeffoor you can send me an email	jeffo@bu.eduThe files are located in several sub-directories:  Chirplets  -- atomic decomposition based on maximum likelihood estimation  Demos      -- demonstrations to get you started  Symplectic -- symplectic transformations (fractional Fourier transform)  TypeI      -- routines for computing type I TFDs (the Cohen class)  TypeII     -- routines for computing type II TFDs  TypeIV     -- routines for computing type IV TFDs  Quartic    -- some quartic functions from my research  Utils      -- some useful utilitiesYou will need to add something like the follwing lines to your startup.m file (do not put a trailing '/' at the end of p!):	p = '/home/jeffo/matlab/DiscreteTFDs';	path(path, p)	DTFDPath(p)	clear pIf you are using a Macintosh or MS Windows, then you will need to edit DTFDPath.m to reflect your system path conventions.At the MATLAB prompt type "help DiscreteTFDs" for a list of available functions, and use "help" to get information on each function.For someone who knows very little about the area of TFDs and wants toexperiment, I would recommend using binomial2, born_jordan2, andspec2 with window lengths ranging from 16 to 128.Jeff O'Neill