1 files changed, 32 insertions, 0 deletions
diff --git a/851/CH5/EX5.5/Example5_5.sce b/851/CH5/EX5.5/Example5_5.sce
new file mode 100755
index 000000000..4be8e91a7
--- /dev/null
+++ b/851/CH5/EX5.5/Example5_5.sce
@@ -0,0 +1,32 @@
+//clear//
+//Example 5:Delta Modulation - to avoid slope overload distortion
+//maximum output signal-to-noise ratio for sinusoidal modulation
+//page 207
+clear;
+clc;
+a0 = input('Enter the amplitude of sinusoidal signal:');
+f0 = input('Enter the frequency of sinusoidal signal in Hz:');
+fs = input('Enter the sampling frequency in samples per seconds:');
+Ts = 1/fs;//Sampling interval
+delta = 2*%pi*f0*a0*Ts;//Step size to avoid slope overload
+Pmax = (a0^2)/2;//maximum permissible output power
+sigma_Q = (delta^2)/3;//Quantization error or noise variance
+W = f0;//Maximum message bandwidth
+N = W*Ts*sigma_Q; //Average output noise power
+SNRo = Pmax/N; // Maximum output signal-to-noise ratio
+SNRo_dB = 10*log10(SNRo);
+disp(SNRo_dB,'Maximum output signal-to-nosie in dB for Delta Modualtion:')
+//Result 1 for fs = 8000 Hertz
+//Enter the amplitude of sinusoidal signal:1
+//Enter the frequency of sinusoidal signal in Hz:4000
+//Enter the sampling frequency in samples per seconds:8000
+//Maximum output signal-to-nosie in dB for Delta Modualtion:-5.1717849 
+//////////////////////////////////////////////////////////////////////
+//Result 2 for fs = 16000 Hertz
+//Enter the amplitude of sinusoidal signal:1
+//Enter the frequency of sinusoidal signal in Hz:4000
+//Enter the sampling frequency in samples per seconds:16000
+//Maximum output signal-to-nosie in dB for Delta Modualtion:3.859115 
+///////////////////////////////////////////////////////////////////////
+//Conclusion: comparing result 1 with result 2, if the sampling frequency
+//is doubled the signal to noise increased by 9 dB