Hello everyone, Before to explain my problem I give some technical information about my hardaware. I'm using USRPs v1 and the boards integrated are XCVR2450 Transceivers.
I'm using the script usrp_spectrum_sense.py in a USRP to detect a signal in a ISM channel. To have a signal expressed in db I did this simple operation to the received signal: signal_db = 20*(math.log10(math.sqrt(m.data[0]/tb.slot_number))) I can control the signal transmitted in the ISM channel; so, I know exactly the time when there is a signal to be detected in the channel. During the first hours the USRP detects the signal giving me a value of around 40 db but after some hours such a detected signal decreases up to roughly 10 db and it does not change anymore regardless of the signal transmitted in the ISM channel. Only if I kill the process running the usrp_spectrum_sense.py script and execute it again, the USRP starts to detect again the 40 db value. The signal to be detected in the ISM channel is always the same. Can anyone tell me which is the problem? Thanks in advance. -- View this message in context: http://gnuradio.4.n7.nabble.com/Different-sensing-results-with-same-hypothesis-tp46403.html Sent from the GnuRadio mailing list archive at Nabble.com. _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
