Data from adc

GNU Radio
1

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

2

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 H.
Radar Remote Sensing Group, University of Cape Town, South Africa
Tel: +27 72 950 9370

3

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