Page 158 - Digital Signal and Image Processing Using MATLAB
P. 158

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                                            a) Oversampling  Low-pass
                                                                M
                                                  M
                                                Expansion       -1/2M  1/2M
                                            b) Undersampling
                                                 Low-pass
                                                                   Decimation
                                                     1
                                                                     M
                                                    -1/2M  1/2M

                                         	
     M


                                                               
+


                              4%  5  %% 
 
+ 
   	          * 
    -
 '
+    %  
   
%

                           + % 4/5  +4/   O 65 J        + * 
    % 
 
+ 
 6        =   46     5=
                           465=  46 O   5=  46 O    5=   	 
       	      	    4%5     6  	  	    '

                                 
 	   	
   
+ 
  + %  
+   63
+    3%	  %+ 
  	 %     
  +
                                .     
+ % 	  

  -     +
                                >   
  %              
  %   
       
 	 %
                                                                 	-
                                >   
  %         	     
  %   
       
 	  % 	-
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