[Discuss-gnuradio] data from adc
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 Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
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 kyung...@nec-labs.com 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 Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
RE: [Discuss-gnuradio] data from adc
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:sheu...@gmail.com] 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 kyung...@nec-labs.com 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 Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio