pythonsignal-processinggnuradiolowpass-filter
GNU Radio Companion - How to calculate average power of a signal
How can I calculate the average power of a signal within a certain bandwidth and store that value in a variable that I can reference for later?
For example, I have a low pass filter 15kHz wide, I want to know if there's a tool in GNU Radio Companion that will allow me to calculate the average power over a certain time to see if the power level passes a threshold.
Solution
The power of a digital signal is simply
. Thus in order to do the following:
calculate the average power
- use the "complex to magnitude square" block to convert your signal to signal power
over a certain time
- use the "moving average" block to calculate the moving average of a specific time slice
see if the power level passes a threshold
- use the "threshold" block to calculate... you guessed it, the threshold.
Have you read the tutorials? http://tutorials.gnuradio.org
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