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[Discuss-gnuradio] usrp_spectrum_sense.py
From: |
Kyungtae Kim |
Subject: |
[Discuss-gnuradio] usrp_spectrum_sense.py |
Date: |
Mon, 18 Jan 2010 15:05:16 -0500 |
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)
- 20*math.log10(tb.fft_size)
-10*math.log(tb.power/tb.fft_size/tb.fft_size)
I wonder it is normal operation.
Thanks,
Kyungtae