initial commit / add all books

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+//clear//

+//Caption:Comparison of error probability of different data transmission schemes

+//Table7.4:Figure 7.20

+//Comparison of Symbol Error Probability

+//of Different Digital Transmission System

+clear;

+close;

+clc;

+//Eb =  Energy of the bit  No = Noise Spectral Density

+Eb_No =[18,0.3162278];

+x = Eb_No(2):1/100:Eb_No(1);

+x_dB = 10*log10(x);

+for i = 1:length(x)

+  //Error Probability of Coherent BPSK 

+  Pe_BPSK(i) = (1/2)*erfc(sqrt(x(i)));

+  //Error Probability of Coherent BFSK

+  Pe_BFSK(i) = (1/2)*erfc(sqrt(x(i)/2));

+  //Error Probability Non-Coherent PSK = DPSK 

+  Pe_DPSK(i) = (1/2)*exp(-x(i));

+  //Error Probability Non-Coherent FSK

+  Pe_NFSK(i) = (1/2)*exp(-(x(i)/2));

+  //Error Probability of QPSK & MSK

+  Pe_QPSK_MSK(i) = erfc(sqrt(x(i)))-((1/4)*(erfc(sqrt(x(i)))^2));

+end

+a = gca();

+a.data_bounds=[-5,0;12.5,0.5]; 

+plot2d(x_dB,Pe_BPSK)

+plot2d(x_dB,Pe_BFSK)

+poly1= a.children(1).children(1);

+poly1.foreground = 3;

+plot2d(x_dB,Pe_DPSK)

+poly1= a.children(1).children(1);

+poly1.foreground = 4;

+plot2d(x_dB,Pe_NFSK)

+poly1= a.children(1).children(1);

+poly1.foreground = 6;

+plot2d(x_dB,Pe_QPSK_MSK)

+poly1= a.children(1).children(1);

+poly1.foreground = 7;

+xlabel('Eb/No in dB ---->')

+ylabel('Probability of Error Pe--->')

+title('Comparison of Noise Performance of different PSK & FSK Scheme')

+legend(['BPSK','BFSK','DPSK','Non-Coherent FSK','QPSK & MSK'])

+xgrid(1)