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BPSK and QPSK have identical BER curve ?

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davyzhu

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qpsk ber curve

Hi all,
I have build a simulation system to test my Error Correcting Code.
And now I add modulation/demodulation module.

When I apply BPSK and QPSK to system, I found their BER versus SNR curve almost identical, is it right in theory?

My code rate is 0.9, code length >10000.

BTW, I found BPSK and QPSK have identical uncoded BER versus SNR curve, is above similar?

Any suggestions will be appreciated!

Best regards,
Davy
 

proakis ber curve bpsk

Hi

That is true, you can check Digital Communications by John G. Proakis page 268, equation (5.2-57)

cheers

Sal
 

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    davyzhu

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