pls its urgent. who can solve it, using matlab. i need the source code. thanks.......

ericiland said:

use matlab to plot the graph of the received power as a function of distance between transmitter and receiver, use simplified free space pathloss (including antenna gains) choose two different carrier frequency and disscus the obtained graph. set all parameters in a reasonable way.


question2: use matlab to illustrate the outage probability due to the combine effect of pathloss and shadowing, set the necessary parameters, including the minimum requried received power in a resonable way. plot the graph of the outage probability as a function of the varing distance between the tansmitter and receiver.

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clear all;
close all;
clc;
disp('The Free Space Propagation Model.');
Gt = input('Enter transmitter antenna gain:- ');
Gr = input('Enter receiver antenna gain:- ');
f = input('Enter the operating frequency:- ');
l = 300 / f;
d = 50:50:2000;

Pl1 = (Gt * Gr * l^2) / ((4 * pi)^2);
for i = 1:40
Pl(i) = -10 * log10(Pl1/d(i)^2);
end

plot(d,Pl,'-*r');
title('The Free Space Propagation Model');
xlabel('T-R seperation(in meters)----->');
ylabel('Path Loss(dB)------>');

ericiland said:

this is the computation of outage probability on matlab


clear all
clc
clf

%Definition of constant

%path loss exponent lambdaa = [2 8]
lambda=3;

%Distance d0=1
d0=1;

%Distance between transmites and receiver
d=[10:0.001:200];

%Constant c=1àlog(K)
c=-31.54;

%Transmited powe pt =[10 100] in dBm
pt=[10:20:90];

%Variance var=sqrt([8 12])
var=3;

%Minimum power pmin=[-500 -100]
pmin=-100;

for i=1:5
%Calculation of z

z=(pmin-(pt(i)+c-10*lambda*log(d/d0)))/(var);

%Calculation of Q

q=0.5*erfc(z/sqrt(2));

%Calculation of the probability
pro=1-q;

%Output
hold on;
xlabel('Distance')
ylabel('Outage probability')
title('Benjamin Abiemo')
plot(d,pro),grid on
end

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