plotting exp given function with db units

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Jimmy cho
Jimmy cho 2021년 10월 1일
댓글: Mathieu NOE 2021년 10월 4일
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.
Appreciate for any help please!!

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Mathieu NOE
Mathieu NOE 2021년 10월 1일
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 ?
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Mathieu NOE
Mathieu NOE 2021년 10월 4일
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)

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