Anyone know how to deal with this case? I need your help.
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Hi, all,
Has anyone used usrp_spectrum_sense.py to sweep frequency band and get the
channel's power? I need your help.
When I use "self.connect(self.u, s2v, fft, c2mag, log, stats)", the FFT bin
values I got are all zero. But if I use "self.connect(self.u, s2v, fft,
c2mag, stats)", some FFT bin v
Hi, all,
Has anyone used usrp_spectrum_sense.py to sweep frequency band and get the
channel's power? I need your help.
When I use "self.connect(self.u, s2v, fft, c2mag, log, stats)", the FFT bin
values I got are all zero. But if I use "self.connect(self.u, s2v, fft,
c2mag, stats)", some FFT bin v
The frequency band ranges from 470MHz to 806MHz, each channel's frequency
band is 8MHz, so we have 42 channels in total. Channel 1,3,5,7 are analog
channels, others are digital channels.
I want to set the value of parameters in usrp_spectrum_sense.py as follows:
fft-size: 2048
channel-bandwidth:8
s-gnuradio] usrp_spectrum_sense.py FFT bin values are all zero.
Hi,
For your application, please experiment with the following command:
./usrp_spectrum_sense.py -A TX/RX --fft-size=25 --samp-rate=25e6 --gain=15
--dwell-delay=0.25 --tune-delay=0.25 --channel-bandwidth=8e6 470e6 800e6
Note that 'freq_step
Hi,
For your application, please experiment with the following command:
./usrp_spectrum_sense.py -A TX/RX --fft-size=25 --samp-rate=25e6 --gain=15
--dwell-delay=0.25 --tune-delay=0.25 --channel-bandwidth=8e6 470e6 800e6
Note that 'freq_step' should remain unchanged at '0.75 * usrp_rate' in the
s
Thanks Mike. I'm a little confused. The parameters are listed as follows:
sample-rate:
channel-bandwidth:
freq_step:
fft_size:
You mean that I should set sample-rate be 25e6, channel-bandwidth be 8e6,
freq_step be 8e6 and fft_size be 25?
If we set the fft-size be 25, then which 8 bins I should s
Hi Jincheng,
Try setting the UHD sample rate to 25e6 and the number of fft bins to 25
which will give you 1e6 Hz per bin. Adding up the magnitude of 8 bins
(1MHz * 8 = 8MHz) will therefore give you the wanted channel power in
decimal format (magnitude).
In case you are confused, I recently updat
I want to use usrp_spectrum_sense.py to sweep the Hong Kong TV band which
ranges from 470MHz to 806MHz and get every channel's power in dB. Each
channel's frequency band is 8MHz.
Now I'm using USRP2 with TVRX2 daughter board. I have installed the latest
gnuraio and uhd. But when I use the usrp_spe
Hi, all,
I use the usrp_spectrum_sense.py to sweep the TV band from 470MHz to
806MHz. But when I use self.connect(self.u, s2v, fft, c2mag, log, stats),
the FFT bin values I got are all zero.
Also, what's the magnitude of FFT bin value? Thanks.
--
Best regards,
Jincheng Zhang
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