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+//Graphical//

+//Example 10.9.1

+//Multistage Implementation of Sampling Rate Conversion

+//Decimation factor D = 100

+//D = D1xD2, D1 = 50, D2 =2

+//Interpolation factor I = 100

+//I = I1xI2, I1 = 2, I2 =50

+clear;

+clc;

+close;

+Fs = 8000;  //Sampling Frequency = 8000Hz

+Fpc = 75;  //Passband Frequency

+Fsc = 80;  //Stopband Frequency

+Delta_F = (Fsc-Fpc)/Fs;  //Transition Band

+Pass_Band = [0,Fpc];

+Transition_Band = [Fpc,Fsc];

+Delta1  = (10^-2);  //Passband Ripple

+Delta2 = (10^-4);  //Stopband Ripple

+D = Fs/(2*Fsc);    //Decimation Factor

+//Decimator Implemented in Two Stages

+D1 = D/2;  //Decimator 1

+D2 = 2;  //Decimator 2

+//Decimator Single Stage Implementation          

+M = ((-10*log10(Delta1*Delta2/2)-13)/(14.6*Delta_F))+1;

+M = ceil(M)

+//Decimator Multistage Implementation

+//First Stage Implementation

+Delta_F1 = 0.020625 //Obtained from Example 10.6.1

+M1 = ((-10*log10(Delta1*Delta2/4)-13)/(14.6*Delta_F1))+1

+M1 = floor(M1)

+//Second Stage Implementation

+Delta_F2 = 0.015625  //Obtained from Example 10.6.1

+M2 = ((-10*log10(Delta1*Delta2/4)-13)/(14.6*Delta_F2))+1

+M2 = floor(M2)

+disp('The Filter length Required in Single stage Implementation of Decimator is:')

+M

+disp('The Filter length Required in Multistage Implementation of Decimator is:')

+M1+M2

+//Calculation of Reduction Factor 

+R = M/(M1+M2);

+disp('The Reduction in Filter Length is:')

+R