label dots with bits - Can someone help me?

how do i label my points?

are complex points.

My code is as follows:

clear all; 
close all; 
clc;

L = 1e4; % Number of bits
SNRdB = 0:28;
SNR = 10.^(SNRdB/10); 
r = 10.^(SNRdB/10);
alpha = 0.3;


max_run = 100;

for sk = 1:length(SNRdB)
    
    for tk = 1:max_run
        
        % 1 ou -1 para sinal em fase (an)
        x_inp_I = sign(rand(1,L)- 0.5);
         
        % 1 ou -1 para sinal de quadratura (bn)
        x_inp_Q = sign(rand(1,L)- 0.5);
        
        QPSK = x_inp_I + 1i .* x_inp_Q;
        
        % Gera bits de marca d'água aleatórios (dI)
        Bit_wat_I = sign(rand(1,L)- 0.5);
        
        % Gera bits de marca d'água aleatórios (dQ)
        Bit_wat_Q = sign(rand(1,L)- 0.5); 
        
        
        % Outra forma de encontrar a equação
        for k = 1:L 
      
            if Bit_wat_I(k) == 1  &&  Bit_wat_Q(k) == 1     
        
               Bit_enviado(k) = (x_inp_I(k) .* ((sqrt(1-alpha)) + (sqrt(alpha)))) + (1i .* x_inp_Q(k) * ((sqrt(1-alpha)) + (sqrt(alpha))));  
                   
            end             
             
        end 
        
    end
end


h = scatterplot(QPSK);
hold on
scatterplot(Bit_enviado,[],[],'r*',h)

I would like to label it with bits like the example below:

[Adam Danz]

The code you shared does not produe that plot.

[Adam Danz]

Where do the binary values come from? How are they related to the points?

[adriane duarte]

the random bits are produced through the variables:x_inp_I,x_inp_Q,Bit_wat_I and Bit_wat_Q.

then I use it in an equation to reproduce my complex points.

Answer 1

[Image Analyst]

Did you try calling text()?

[adriane duarte]

yea!!

I've done it in two ways:

First:

- I separated the real from the imaginary

q_real = real (Bit_enviado);
q_imag = imag (Bit_enviado);

- I applied strings to each one

str = string (q_real);
str1 = string (q_imag);
textscatter (q_real, q_imag, str);

But it doesn't come out the way I want it. a factor comes out

Second:

- I separated the real from the imaginary

q_real = real (Bit_enviado);
q_imag = imag (Bit_enviado);

- I turned each one into binary

bits32_real = dec2bin (typecast (single (q_real), 'uint32'));
bits32_imag = dec2bin (typecast (single (q_imag), 'uint32'));

or

z2_real = reshape (dec2bin (typecast (q_real, 'uint32'), 4). ', 1, []);
z2_imag = reshape (dec2bin (typecast (q_imag, 'uint32'), 4). ', 1, []);

Then I don't know what else to do.

Can you help me? @Image Analyst

[Image Analyst]

You can loop over all (x,y) coordinates and call text() with the binary string - the 0101 or whatever:

for k = 1 : length(x)
    thisx = x(k);
    thisy = y(k);
    binaryString = whatever you have to do to get it
    text(thisx, thisy, binaryString, 'Color', 'r', 'FontSize', 15, 'FontWeight', 'bold');
end

[Image Analyst]

So did you try the code in my comment above (click "Show older comments" link above to see it)?

I can't run your program because

'scatterplot' requires Communications Toolbox.

You forgot to add the Communications Toolbox to the product list when you posted so I'll add it now.

[adriane duarte]

Oi!!!

Eu testei seu código sim!

obrigado.

Você poderia me ajudar com outra pergunta? @Image Analyst

Answer 2

[Sulaymon Eshkabilov]

Hi,

(1) you need to create binary representation of your plotted points using dec2bin() for labels to display on the plot

(2) to put labels to all of your plotted points, you can employ this code written by Adam Danz

https://www.mathworks.com/matlabcentral/fileexchange/46891-labelpoints

[adriane duarte]

Hi @Sulaymon Eshkabilov

i am not experienced in matlab but i will try