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Diffstat (limited to '3542/CH5/EX5.9/Ex5_9.sce')
| -rw-r--r-- | 3542/CH5/EX5.9/Ex5_9.sce | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/3542/CH5/EX5.9/Ex5_9.sce b/3542/CH5/EX5.9/Ex5_9.sce new file mode 100644 index 000000000..0b7341e62 --- /dev/null +++ b/3542/CH5/EX5.9/Ex5_9.sce @@ -0,0 +1,23 @@ +// Example no 5.9
+// To find the average fade duration and average number of bit errors per second. & to determine whether the fading is slow or fast.
+// Page no. 225
+
+clc;
+clear all;
+
+// Given data
+rho=0.707; // Threshold level
+fm=20; // Doppler frequency
+datarate=50; // Bit duration of binary digital modulation in bps
+errho=0.1; // Threshold level below which bit error occurs
+
+t=(exp(rho^2)-1)/(rho*fm*sqrt(2*%pi)); // The average fade duration
+tb=1/datarate; // Bit period
+t1=(exp(errho^2)-1)/(errho*fm*sqrt(2*%pi)); // The average fade duration
+
+// Displaying the result in command window
+printf('\n The average fade duration (for rho = 0.707) = %0.1f ms',t*10^3);
+printf('\n The bit period = %0.0f ms',tb*10^3);
+printf('\n Since the bit period is greater than average fade duration, for 50bps datarate the signal undergoes fast Rayleigh fading.');
+printf('\n \n The average fade duration of the threshold level below which bit error occurs (for rho = 0.1) = %0.3f',t1);
+printf('\n Since the average fade duration of the threshold level below which bit error occurs is less than duration of one bit,\n only one bit on average will be lost');
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