QAM Shannon Limit?

Hi all,

I am told that there are Shannon Limit (Eb/No) with every code-rate
BPSK modulation.

Are there Shannon Limit (Eb/No) with every code-rate QAM(like 16QAM and
64QAM) modulation?

Any suggestions will be appreciated!

Best regards,
Davy

Dear Davy,
If you mean the theoretical curve of Eb/No versus the SNR. Then, yes,
you have different curves for each modulation technique.

Thanks
Hany


Davy wrote:
> Hi all,
>
> I am told that there are Shannon Limit (Eb/No) with every code-rate
> BPSK modulation.
>
> Are there Shannon Limit (Eb/No) with every code-rate QAM(like 16QAM and
> 64QAM) modulation?
> 
> Any suggestions will be appreciated!
> 
> Best regards,
> Davy

Hi Hany,

Thank you for your help.

How can I get the theoretical curve of Eb/No versus the SNR?
Shall I do some simulation?

Best regards,
Davy

A few modulations have closed form solutions for their BER curves that you
can plot, but most require simulation to generate. There are also plenty of
curves that are approximate closed form solutions to the BER. Seems to me
there's a cottage industry for generating curves that upper or lower bound
the BER over various parts of the SNR axis.

See "digital communications" by Proakis.

-Clark

"Davy" <zhushenli@gmail.com> wrote in message
news:1141552227.847513.3260@p10g2000cwp.googlegroups.com...
> Hi Hany,
>
> Thank you for your help.
>
> How can I get the theoretical curve of Eb/No versus the SNR?
> Shall I do some simulation?
>
> Best regards,
> Davy
>

"Davy" <zhushenli@gmail.com> wrote in message 
news:1141542441.288075.251580@z34g2000cwc.googlegroups.com...
> Hi all,
>
> I am told that there are Shannon Limit (Eb/No) with every code-rate
> BPSK modulation.
>
> Are there Shannon Limit (Eb/No) with every code-rate QAM(like 16QAM and
> 64QAM) modulation?
>
> Any suggestions will be appreciated!
>
you could google for "shannon hartley"

it may be what you are looking for.

Best of luck - Mike