plotting exp given function with db units
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Hi , I rarely use matlab and Im trying to plot this function
y = 0.3exp(-0.08SINR[dB])
I'm trying to get the plot of that function and I coudn't succeed in matlab .. any help?
this function plot should look like this as the book :
THE BLUE LINE is that function y I assigned above and Im trying to plot it in matlab with those given SINR values in the photo.
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/755749/image.png)
Appreciate for any help please!!
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Accepted Answer
Mathieu NOE
on 1 Oct 2021
here you are , my friend !
SINR_dB = (-5:20);
y = 0.3*exp(-0.08*SINR_dB);
plot(SINR_dB,y,'b','LineWidth',4);
ylim([0 0.8]);
xlabel('SINR[dB]');
ylabel('BLER');
seems the exponentail law will not be valid for SINR > 15 (that sudden drop).
also at SINR = -5 the BLER is supposed to be 0.5 whereas our plot show something around 0.45
are your coefficients somehow rounded or ?
3 Comments
Mathieu NOE
on 4 Oct 2021
hello Jimmy
not sure to understand , what you mean by lower and upper bound values
this is the plot generated by my code (see above)
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/757424/image.png)
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