Your thoughts on attached simulation?

The objective is to measure the phase difference between a noisy burst of 200ms containing 500Hz and a reference 500Hz.

Attached grc runs without hardware, contains the signal sources and works as follows:

1. A noisy 200ms burst signal of 500Hz is generated based on a 500Hz sine.
2. A squelch block its sob-Tag triggers a python block which diverts the stream (during the active pulse) from the default null sink to a detector.
3. The detector is a conjugate multiplication which transfers the difference of both signals to DC.
   The noise is averaged out and the resulting phase difference is extracted.
4. A compass and constallation sink show the phase difference

Thanks for sharing your thoughts what to improve in the phase shift detection of this simulation.

Robert

https://github.com/rrrRbert360/GR_Burst_PHdetection