Why is the PER curve for BW40 the same as it is for BW20?

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MathWorks Support Team on 22 Feb 2019

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Answered: MathWorks Support Team on 21 Mar 2019

Why is the PER curve for BW40 the same as it is for BW20?

I am seeing the same PER curve at two different channel bandwidth settings, but I would expect the PER for the CBW40 to be 3dB lower than the PER for the CBW20.

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MathWorks Support Team on 22 Feb 2019

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We expect a 3dB decrease in power density when the bandwidth doubles from CBW20 to CBW40 or from CBW40 to CBW80. We do not necessarily expect the PER curve to drop by 3dB since it is not linearly related to the power density.