chirphlp.m

ADSP TOOLBOX: Version 2.0 and gui m-files

function chirphlp
% CHIRPHLP Help file for CHIRPGUI


% ADSP Toolbox: Version 2.0 
% For use with "Analog and Digital Signal Processing", 2nd Ed.
% Published by PWS Publishing Co.
%
% Ashok Ambardar, EE Dept. MTU, Houghton, MI 49931, USA
% http://www.ee.mtu/faculty/akambard.html
% e-mail: [e-mail]
% Copyright (c) 1998



%============================================================
    tit_str= 'CHIRP SIGNALS AND THEIR SPECTRA';
    page1= ... 
        ['                                                 ' 
         ' This GUI allows you to display a chirp signal,  ' 
         ' its PSD estimate and time-frequency spectrum.   '  
         '                                                 '  
         ' Enter the starting and ending digital frequency '  
         ' of the chirp in the edit boxes for F0 and F1.   '
         '                                                 '
         ' Enter the number of samples.                    '
         '                                                 '
         ' Select the method for the PSD estimate:         '
         ' The periodogram estimate is the least accurate  '  
         ' If Welch is selected, you can edit values for   '  
         ' section length and percent overlap and select   '
         ' the type of window used.                        '
         ' If Blackman-Tukey is selected, you can edit the '
         ' section length.                                 '
         '                                                 '
         ' The time-frequency plot uses the Welch PSD      '
         ' and shows how the frequency varies with time.   '];
 

    page2= ...                                          
        [' SPECIAL FEATURES                                ' 
         '                                                 '
         ' CURSOR: Turn it on and then move and click      '
         ' the mouse button inside a plot to activate.     '
         ' The co-ordinates of the mouse are displayed in  '
         ' the upper right corner as you move the mouse.   '
         '                                                 '
         '                                                 '
         '                                                 '
         ' M-FILE NAME:  chirpgui                          '];

    helpgui(tit_str,page1,page2);