How can I compute a graph with BER and EbN0 values

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Liam 2024-7-5，11:10

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https://ww2.mathworks.cn/matlabcentral/answers/2134751-how-can-i-compute-a-graph-with-ber-and-ebn0-values

回答： Umar 2024-7-5，11:47

Now I have got images in the proper colour, I am wondering as to how plot a graph to show the Bit Error Rate to EbN0 in dB. I have found an example plot in another report but how can I plot this myself?

I know that semilogy is required for this but I am unsure where to start if anyone could point me to a MATLAB example or give any guidance on where to start with this?

Thanks in advance

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Answer 1

Umar 2024-7-5，11:47

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Hi Liam,

To plot the Bit Error Rate (BER) against Eb/N0 in dB using MATLAB, you can follow these steps:Calculate the BER values for different Eb/N0 ratios. Then, convert the Eb/N0 ratios to dB scale. Finally, use the semilogy function to plot the BER values against the Eb/N0 in dB. Here is an example to help you out. For more information regarding semilogy function, please refer to

https://www.mathworks.com/help/matlab/ref/semilogy.html#

>> % Generate Eb/N0 values in dB EbN0_dB = -10:0.5:10;

% Calculate corresponding BER values (example values) BER = 0.5 * erfc(sqrt(10.^(EbN0_dB/10)));

% Plot the BER vs. Eb/N0 semilogy(EbN0_dB, BER, 'o-'); xlabel('Eb/N0 (dB)'); ylabel('Bit Error Rate (BER)'); title('BER vs. Eb/N0 Plot'); grid on;

Please see attached plot.

You can adjust the range of Eb/N0 values and the BER calculation based on your specific requirements. This code will help you visualize the relationship between BER and Eb/N0 in dB using a logarithmic scale for BER.