Can someone help me? - Plotting complex number with index

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adriane duarte 2021-5-26

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https://ww2.mathworks.cn/matlabcentral/answers/839770-can-someone-help-me-plotting-complex-number-with-index

评论： Sulaymon Eshkabilov 2021-5-27

采纳的回答： Sulaymon Eshkabilov

在 MATLAB Online 中打开

I plotted complex numbers as follows:

and I got some complex numbers, like for example:

result plot:

how do I put the corresponding bit values (1000,1100, ...) according to the example below???

Can someone help me?

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Answer 1

Sulaymon Eshkabilov 2021-5-27

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在 MATLAB Online 中打开

Hi,

Here is the answer to convert imaginary and real numbers from a floating point format into binary:

N = 16;         % Number bits for integer part:      
M = 25;         % Number bits for fraction part:
% Conversion from floating point format into binary number
%% REAL Part:
for ii=1:numel(q_real)
BIN1(ii,:) = fix(rem(q_real(ii)*pow2(-(N-1):M),2)); 
% Test the inverse transformation
DEC1(ii) = BIN1(ii,:)*pow2(n-1:-1:-m).';
end
%% IMAG Part:
for ii=1:numel(q_imag)
BIN2(ii,:) = fix(rem(q_imag(ii)*pow2(-(N-1):M),2)); 
% Test the inverse transformation
DEC2(ii) = BIN2(ii,:)*pow2(n-1:-1:-m).';
end

Good luck.

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adriane duarte 2021-5-27

Thanks!!

Sulaymon Eshkabilov 2021-5-27

Most Welcome!

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Answer 2

Sulaymon Eshkabilov 2021-5-26

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(1) Separate real and imaginary parts using real(), imag()

(2) PLot them: Real vs. Imag

(3) Convert the separated real and imaginary values (floating point numbers) to binary strings using:

http://www.mathworks.com/matlabcentral/answers/25549-convert-floating-point-to-binary

http://matlabgeeks.com/tips-tutorials/conversion-of-floating-point-numbers-in-matlab/

http://matlaboratory.blogspot.hu/2008/12/converting-decimal-to-binary-and-binary.html

http://stackoverflow.com/questions/12748721/converting-a-non-integer-number-to-binary-in-matlab

and so forth.

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adriane duarte 2021-5-26

编辑：adriane duarte 2021-5-26

在 MATLAB Online 中打开

       
        L = 1e4; % number of bits
        SNRdB = 0:28;
        max_run = 100;
        alpha = 0.3;
        
        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);
        
        % 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); 
        
        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
        
            q_real = real(Bit_enviado);
        
            q_imag = imag(Bit_enviado);