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+//Exa 3.10

+//To find required total transmit power in Watts.

+

+clc;

+clear all;

+

+Lp=140; // path losses in dB 

+k=1.38*10^-23; // Boltzmann’s constant (W/Kelvin-Hz)

+k_db=10*log10(k);

+f=900;//in MHz

+Gt=8; //transmitting antenna gain(dB)

+Gr=0; //receiver antenna gain(dB)

+Ag=24;//gain of receiver amplifier in dB 

+Fmargin=8;//Fade margin(dB)

+Nf=6;//Noise figure(dB)

+L0=20; // other losses in dB

+Lf=12; // antenna feed line loss in dB 

+T=24.6;//Temperature expressed in dB

+R=39.8; // data rate in dB 

+M=8;  //overall link margin(dB)

+Eb_No=10;//dB

+

+//solution

+//From equation  (3.54)

+pt_db=M-Gt-Gr-Ag+ Nf + T+ k_db+ Lp+ Lf+ L0 + Fmargin+ R+ Eb_No;

+

+Pt=10^(pt_db/10);  //dB into normal number

+printf('Total transmitted power is %d Watts \n',Pt);