Help for plotting graph. Can someone help me?

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adriane duarte
adriane duarte 2021-6-11
编辑： adriane duarte 2021-6-15
Good night people.
I'm having difficulty plotting two graphs referring to my code.
The code is below:
clear all;
close all;
clc;
% number of bits
L = 1e4;
N = 1;
M = L/N;
u = [ ones(1,N) ];
alpha = 0.3;
% LED information
Vt = 0.5;
Is = 0.12;
% LED model
K = 0.8;
imax = 0.5;
threshold = 150;
sigmaV2 = (imax/threshold)^2;
% Signal to Noise Ratio (in dB)
SNRdB = -10:2:32;
SNR = 10.^(SNRdB/10);
% standard deviation of the signal (power)
sigmaX2v = SNR*sigmaV2;
alphaICS = 0.3;
% Minimum number of bits for BER calculation
minNbits = 500;
for count=1:length(SNRdB)
an = 2*randi([ 0 1 ],1,L)-1;
bn = 2*randi([ 0 1 ],1,L)-1;
dI = 2*randi([ 0 1 ],1,L)-1;
dQ = 2*randi([ 0 1 ],1,L)-1;
sn = an.*(sqrt(1-alpha) + sqrt(alpha).*dI) +1i.*bn.*(sqrt(1-alpha) + sqrt(alpha).*dQ);
sn1 = sn.';
Y = sn1; % transmitter
stdS = std(Y);
X = zeros(1,4*L);
X(2:2:end) = [Y; conj(Y(end:-1:1))];
xTD = ifft(X);
xTD = (sqrt(sigmaX2v(count)))*xTD/std(xTD);
xx = xTD;
ind = find(xTD < 0);
xx(ind) = zeros(size(ind));
ss = xx;
iLED = Is*(exp(ss/Vt)-1);
xLED = iLED./( (1 + (iLED/imax).^(2*K)).^(1/(2*K)));
nErrorsBitsInf = 0;
nErrorsBitsW = 0;
cont = 0;
while ( (nErrorsBitsW < minNbits) || (nErrorsBitsInf < minNbits))
cont = cont + 1;
v = sqrt(sigmaV2)*randn(size(xx));
y = xLED + v;
Nframe = length(y);
Xhat = (fft(y));
Shat = Xhat(2:2:Nframe/2);
Shat = stdS*Shat/std(Shat); % receiver
end
end
I would like to plot two separate figures: one with the result of the receiver (Shat) and the other of the transmitter (Y).
I have a model chart below.
I would like to plot the graph this way (with the bits in the caption and separated by markers)
I accept any idea (using loop or not).
I've tried everything but couldn't get the desired result.
Can someone help me?

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回答（1 个）

Alan Stevens
Alan Stevens 2021-6-11
In your while loop you don't update either nErrorsBitsW or nErrorsBitsInf so they always stay at 0, and never reach minNbits.
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Alan Stevens
Alan Stevens 2021-6-13
Presumably, nErrorsBitsW and nErrorsBitsInf depend on something calculated within the while loop. You need to recalculate them within the loop using that. I don't know what they depend on, so can't be more specific.

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