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BPSK and QPSK have identical BER curve ?
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davyzhu



Joined: 23 May 2004
Posts: 521
Helped: 3
Location: oriental
Post05 Mar 2006 12:57   

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
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Sal



Joined: 29 Nov 2005
Posts: 310
Helped: 37
Post06 Mar 2006 8:17   

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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