Hello,
I am trying to detect energy on 10kHz size channel or less resolution.
With the fft_size 1024, 8MHz /1024 = 7.815 kHz is FFT frequency
resolution. I have a question in here. Of the returned value, (i.e. the
center frequency = 2.5G) m.data, m.data[1] shows the energy of 2.5G to
2.5007G,
Hello,
I am trying to detect energy on 10kHz size channel or less resolution.
With the fft_size 1024, 8MHz /1024 = 7.815 kHz is FFT frequency
resolution. I have a question in here. Of the returned value, (i.e. the
center frequency = 2.5G) m.data, m.data[1] shows the energy of 2.5G to
2.5007G,
: 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
, January 18, 2010 2:11 PM
To: Kyungtae Kim
Cc: discuss-gnuradio@gnu.org
Subject: Re: [Discuss-gnuradio] measuring noise power
On 01/18/2010 01:22 PM, Kyungtae Kim wrote:
Thanks, I tried to find the example, however I couldn't in the gnuradio
directories. Could you let me know where I can
Hi,
In my experimentation, the measured power depends on fft_size and
dwell_delay in usrp_spectrum_sense.py while measuring noise power, the
larger those values results in higher measured power even if it is
normalized based on the fft_size like this.
20*math.log10(math.sqrt(bin)/tb.fft_size)
g] On
Behalf Of Marcus D. Leech
Sent: Monday, January 18, 2010 1:06 PM
To: discuss-gnuradio@gnu.org
Subject: Re: [Discuss-gnuradio] measuring noise power
On 01/18/2010 12:36 PM, Kyungtae Kim wrote:
Hi,
I am looking for a way to measure noise power through usrp1. I tried to
test
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
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Hi,
I am looking for a way to measure noise power through usrp1. I tried to
test with usrp_spectrum_sense.py, however I am not sure the power values
measured is correct, because it is not same values shown as the graph
from usrp_fft.py. I wonder if someone helps me out for this.
Thanks,
Ky
