On 12/20/2016 06:28 PM, Tellrell White wrote:
Hello All
My goal is take in samples from my USRP N210 and calculate the average
power of the signal. At the moment, I'm during a simulation in gnu
radio to see if i can do this first using the following flow graph:
signal source -> stream to vec -> FFT -> complex
to mag^2 -> file sink
Samp rate = 32k
Signal freq = 1k
FFT size = 1024
1) I saw on the mailing list that the WX Gui FFT sink block calculates
calculates PSDs. Does anyone know if this is true or does it just
calculate the complex magnitude?
2) Using the flow graph shown above is there any way that to display
the power using a gui sink instead of using a file sink or to plot the
output from the file sink in gnu radio?
Thanks
Tellrell White
If you want the power over some bandwidth, set your sample rate to that
bandwidth and:
source--->complex_to_mag**2-->fave-averager-->(optional
RMS)--->keep-one-in-N---->file sink
Now, the values you get out of that will be *linearly proportional* to
the power as seen at the antenna terminals. In order to know the
actual power, you will need to calibrate over your desired range of
bandwidths and center frequencies and gain.
_______________________________________________
Discuss-gnuradio mailing list
Discuss-gnuradio@gnu.org
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
