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// Example no 6.11
// To find 3-dB bandwidth for gaussian low pass filter to produce 0.25GMSK, 90% power bandwidth.
// Page no. 321
clc;
clear all;
// Given data
Rb=270*10^3; // Channel data rate in bps
BT=0.25; // 3-dB bandwidth-bit duration product
T=1/Rb; // Time
B=BT/T; // 3-dB bandwidth in Hz
// Answer is varrying due to round-off error
// 90% power bandwidth
B1=0.57*Rb; // The 90% power bandwidth
// Answer is varrying due to round-off error
// Displaying the result in command window
printf('\n The 3-dB bandwidth-bit duration product = %0.3f kHz',B*10^-3);
printf('\n The 90 percent power bandwidth = %0.1f kHz',B1*10^-3);
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