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RE: [Discuss-gnuradio] data from adc


From: Kyungtae Kim
Subject: RE: [Discuss-gnuradio] data from adc
Date: Mon, 18 Jan 2010 15:12:26 -0500

Thanks Sebastiaan. Now I know what the decimation means. Then, if I
decimate by 4 or 8, how I can get the sampled values before reaching fft
bins. What I want to do is to measure the noise power.

Thanks,
Kyungtae

-----Original Message-----
From: Sebastiaan Heunis [mailto:address@hidden 
Sent: Monday, January 18, 2010 1:11 PM
To: Kyungtae Kim
Cc: Gnuradio
Subject: Re: [Discuss-gnuradio] data from adc

Kyungtae

Do you mean directly after it is sampled, before any of the DDC
functions?  Then the answer is no.  You will have to decimate by a
factor of at least 4 when using real sampling and 8 when using complex
sampling to be able to get the data over the USB link (for the USRP1).

Sebastiaan

-- 
Sebastiaan Heunis
Radar Remote Sensing Group, University of Cape Town, South Africa
Tel:  +27 72 950 9370


On Mon, Jan 18, 2010 at 7:46 PM, Kyungtae Kim <address@hidden>
wrote:
> Hi,
>
>
>
> Is there a way to get the data from ADC directly? I can find some
examples
> to get it with using FFT, however without FFT, I wonder how it can be
> gotten.
>
>
>
> Thanks,
>
> Kyungtae
>
> _______________________________________________
> Discuss-gnuradio mailing list
> address@hidden
> http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>
>




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