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//Example no 5.4
//To compute a)RMS delay spread b)maximum bit rate
//Page no. 201
clc;
clear all;
//Given data
t1=0; //Excess delay of first signal
a1=0; //Power level of first signal in dB
t2=1*10^-6; //Excess delay of second signal
a2=0; //Power level of second signal in dB
a1=10^(a1); //Power level of first signal in Watt
a2=10^(a2); //Power level of second signal in Watt
//a)To compute RMS delay spread
t=((a1*t1+a2*t2)/(a1+a2))*10^6; //Mean excess delay
t2=((a1*t1^2+a2*t2^2)/(a1+a2))*10^12; //Mean square excess delay
sigmat=sqrt(t2-t^2); //RMS delay spread in microseconds
//Displaying the result in command window
printf('\n The RMS delay spread = %0.1f microseconds',sigmat);
//b)To compute maximum bit rate
Ts=(sigmat*10^-6)/0.1; //Sampling time of BPSK modulated signal
Rs=(1/Ts)*10^-3; //Maximum bit rate in kbps
//Displaying the result in command window
printf('\n The maximum bit rate = %0.0f kbps',Rs);
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