Close-In path loss model

11 views (last 30 days)
Rahul Gulia
Rahul Gulia on 16 May 2022
Commented: Rahul Gulia on 24 May 2022
Hi team,
I am trying to replicate some results from the research paper "Multi-Frequency Multi-Scenario Millimeter Wave MIMO Channel Measurements and Modeling for "B5G Wireless Communication Systems".
I am trying to model the Close-In path loss model from the paper, and trying to creating the following plot.
for the following parameters;
I have reproduced the Free space path loss model, but I am not able to reproduce the Close-In path loss model. I would really appreciate any kind of input on this topic.
function PL = My_FreeSpace_PL(freq, dist)
c = physconst('lightspeed');
PL = fspl(dist,c/freq);
end
function PL = My_CI_PL(freq, dist,n,sigma)
c = physconst('lightspeed');
PL = fspl(dist,c/freq) + 10*n*log10(dist) + sigma*randn(size(dist));
end
%% Main Code
clc;
clear all;
close all;
%% Free Space path loss model
c = physconst('lightspeed');
R0 = 1:2:1000;
freq = 28e9;
% apathloss = fspl(R0,c/freq);
for k = 1:length(R0)
apathloss(k) = My_FreeSpace_PL(freq, R0(k));
end
figure(2) % Replicating the research paper FSPL
semilogx(R0,apathloss);
grid on;
% ylim([90 200]);
legend('Frequency: 28 GHz');
xlabel('Tx-Rx distance (m)');
ylabel('Path Loss (dB)');
title('Free Space Path Loss');
%% CI path loss model
% 28 GHz band
n1 = 2.637;
sigma1 = 5.47;
f1 = 28e3;
for k = 1:length(R0)
CI_PL1(k) = My_CI_PL(f1,R0(k),n1,sigma1);
end
figure(2)
semilogx(R0,CI_PL1)
grid on;
My Output:

Accepted Answer

Rahul Gulia
Rahul Gulia on 16 May 2022
Hello everyone,
One solution that I found myself was to increase the distance from
R0 = 1:2:1000;
to
R0 = 1:250:1000;
  2 Comments
mer potter
mer potter on 24 May 2022
Hello. Have you solved your problem with the close in path loss model? I have a similar assignment in my graduate thesis and it would be awesome if you could send me your code.
Rahul Gulia
Rahul Gulia on 24 May 2022
Yes I solved the problem. I have also put my code over there. Kindly copy it and use it for your reference.
And change the distance to R0 = 1:250:1000;
Hope that helps.
Thank you,
Rahul Singh Gulia

Sign in to comment.

More Answers (0)

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!