Thank you all,
I will try that.
Kind regards.
On Thu, Jun 7, 2018 at 10:16 PM, Martin K <martin.klingensm...@gmail.com>
wrote:
> The following call is how I read data into MATLAB from the GNURadio file
> sink. I think this would almost work in Octave as well but I haven't tried.
> If not it, it at least illustrates the proper format.
>
> FileID = fopen('Filename','r');
> import_channels = 2;
> SamplesPerFrame = 1024;
> import_format = 'float32';
> x = fread(FileID,[import_channels SamplesPerFrame],import_format)';
> complex_baseband = complex(x(:,1),x(:,2));
>
> I have this embedded in a MATLAB system class. I extricated the
> fopen/fread() calls for clarity.
> HTH
> --
> Martin K.
>
>
>
> On Thu, Jun 7, 2018 at 9:30 AM, Federico 'Larroca' La Rocca <
> flarr...@gmail.com> wrote:
>
>> Hello again,
>>
>> To export from GNU Radio to octave, you should first use a "File Sink"
>> block and then one of the scripts in gr-utils/octave. I'm pretty sure they
>> are compatible with matlab too.
>>
>> About the SNR, that depends on what you want. If you want the power of
>> noise that actually affects your decision system divided by the power of
>> the symbols, then MER is what you are looking for (assuming your sampling
>> and frequency correction works properly). If you want the more classic SNR
>> (i.e. power of the useful signal divided by the total noise power in the
>> band), then that's more involved. You may try the following: since you know
>> the constellation points and the pulse, you may easily calculate the power
>> of the useful signal (assuming your AGC works properly and that the channel
>> is flat fading). The difference between this power and the actual received
>> power is due to noise (assuming independence).
>>
>> However, what matters performance-wise is the amount of noise that gets
>> into the decision system, and not the actual SNR.
>>
>> Hope it helps!
>>
>>
>>
>
>
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>
--
Eng. Luis Felipe Albarracin
PMP
CCNA/CCDA/CCNP/CCDP/CCIP
ITIL v3 Foundation
Msc. Telematics / MBA
"Die Grenzen meiner Sprache bedeuten die Grenzen meiner Welt"
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