Hello-
I am interested in determining the rms strength of the carrier of an AM
modulated waveform, and displaying it in realtime, perhaps as a windowed
average value. I am using the LFRX boards on the USRP. This question probably
comes up a lot in the SNR and RSSI related posts, but perhaps not specifically
for my application. Are there currently tools available in the gnuradio libs
for this? If not, I would appreciate a run-down of what technique is needed to
do this, and if there are any related codes that can be used as a guide. In
principle it would seem to me that just measuring the rms of the I or Q stream
would be sufficient if the modulation index is low (which it is). If not, then
perhaps dividing the I or Q stream with the modulation (obtained with
gr.complex_to_mag())?
Thanks,
eric
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