Re: [Discuss-gnuradio] How to calculate SNR?

[Marcus Müller]

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Ah, the picture of your flowgraph took some time to load, so I thought
it was broken.
First of all: to get truly comparable numbers, you should set the IIR
alpha to the same value for the probe and the RMS blocks.

Then: What you're doing with the RMS blocks is something different
than what the MPSK SNR estimators do; please refer to
http://gnuradio.org/doc/doxygen/classgr_1_1digital_1_1mpsk__snr__est.html
and the papers linked on the respective implementations for detail.

Greetings,
Marcus

On 26.03.2014 16:16, Marcus Müller wrote:
> Hi Azza,
> 
> how do you know RMS(noise)?
> 
> Greetings, Marcus
> 
> On 26.03.2014 16:14, Azza Ben Mosbah wrote:
>> I calculate the SNR using the formula 
>> SNR=20*log10[RMS(signal)/RMS(noise)]. You find attached my flow 
>> graph.
>> <http://gnuradio.4.n7.nabble.com/file/n47229/flowgraph.png>
> 
> 
>> Azza
> 
> 
> 
>> -- View this message in context: 
>> http://gnuradio.4.n7.nabble.com/How-to-calculate-SNR-tp47193p47229.html
>
>> 
> 
> Sent from the GnuRadio mailing list archive at Nabble.com.
> 
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