Any matlab codes for UAV trajectory generation for randomly distributed moving ground users, using any reference datasets

Hello Mathwork Community,

I need a help to draw the trajectory of UAV based on the ground users mobility in cognitive Radio network in matlab. I need any reference/source codes that can be used to draw the trajectory of UAV based on the ground users mobility. I will be thankful if someone shares the informations or data in this regards.

Kind Regards!

Answer 1

[Walter Roberson]

I suggest that you use animatedline() to draw the trajectory.

If you create a scatter() of the user locations and you record the handle returned by scatter(), then you can update the XData and YData properties of the handle in order to move the users efficiently.

Your question does not include any information about how to decide where to move the UAV

Answer 2

[Khalid Khan]

@Walter Roberson, Thank you for your prompt response,

actually I am trying to draw the trajectory but not able to do so the code is below

clc

clearvars

% Set the random number generator seed, for reproducibility

rng default

% Number of iterations to run the algorithm

NITER = 10;

% Number of seconds to pause after each figure

NPAUSE = 1;

% Fixed circle parameters

NCIRCLES = 7;

% x0 = [100 450 500 650 900 900 800]';

% y0 = [700 200 600 500 400 100 850]';

% Number of users

NUSERS = 50; % <--- Change this to 200

for ni = 1:NITER

k = 0;

userCircle = randi(NCIRCLES,NUSERS,1);

usersPerCircle = histcounts(userCircle,1:NCIRCLES+1)';

% circleRadius = sqrt(usersPerCircle);

circleRadius = 10*sqrt(usersPerCircle);

circleRadius_max = 10*ceil(max(circleRadius*0.1)); % rounded to upper ten's

min_gap = 3*circleRadius_max; % min gap between groups - adapt factor here (min = 2)

figure(ni)

axis square

set(gca,"Box","on")

grid on;

set(gcf, 'units','normalized','outerposition',[0 0 1 1]);

axis([0 1000 0 1000])

fontSize = 10;

xlabel('Position X (1000m)', 'FontSize', fontSize);

ylabel('Position Y (1000m)', 'FontSize', fontSize);

title('Random Users Within Circles', 'FontSize', fontSize);

axis([0 1000 0 1000])

hold on

% create random values for circles position

a = randi([circleRadius_max,1000-circleRadius_max],NCIRCLES,2);

x0 = a(:,1);

y0 = a(:,2);

d0 = sqrt((x0-x0').^2 + (y0-y0').^2);

min_d0 = min(d0(d0>0));

while min_d0 <= min_gap % retry with new data if condition of gap distance is not met

a = randi([circleRadius_max,1000-circleRadius_max],NCIRCLES,2);

x0 = a(:,1);

y0 = a(:,2);

d0 = sqrt((x0-x0').^2 + (y0-y0').^2);

min_d0 = min(d0(d0>0));

k = k+1;

end

k % shows iterations amount to get a new valid set of coordinates that fullfil the required gap distance

for nc = 1:NCIRCLES

tnc = 2*pi*rand(usersPerCircle(nc),1);

% rnc = 10*circleRadius(nc)*rand(usersPerCircle(nc),1);

rnc = circleRadius(nc)*rand(usersPerCircle(nc),1);

x = x0(nc) + rnc.*cos(tnc);

y = y0(nc) + rnc.*sin(tnc);

h = plot(x,y,".");

set(h,'MarkerSize',8)

end

pause(NPAUSE)

hold off

end

[Walter Roberson]

That is code to move the users, but does not appear to have anything for the UAV.

Answer 3

[Khalid Khan]

@Walter Roberson, would like to help me in this regards

I mean I am new to matlab, I need to generate the UAV and then follow these users mobility to plot the trajectory of UAV based on the mobility of these users.

I will be very grateful for this as I am trying but not able to draw the trajectory of UAV.

Kind Regards

[Walter Roberson]

Which of your variables holds the coordinates of the UAV?

Answer 4

[Walter Roberson]

ux = randi(100);
uy = randi(100);
L = animatedline(ux, uy);
xlim([0 100]) 
ylim([0 100])

for K = 1 : 100
  ux = ux + randi([-15 15]);
  uy = uy + randi([-15 15]);
  addpoints(L, ux, uy);
  drawnow;
end

... using animatedline just like I said originally

[Walter Roberson]

See also https://www.mathworks.com/matlabcentral/answers/1732510-during-the-moving-random-points-i-don-t-see-animation-instead-i-see-re-scattering#comment_2196170