I would like to analyze three New Packet Radio (NPR) stations (master with two clients) sending on the same frequency in burst mode. A polling sequence from these three stations lasts approximately 70 to 100 ms. Can I perform this action with KrakenSDR? Must I use parameter DOA Algorithm MUSIC? Must I set parameter RF Station with MUSIC to the value of 3? Do I recognize the result on DOA Estimation screen? Do I recognize the result of these three bearings (three transmitters) on the map? Please send some further information.
Can I perform this action with KrakenSDR?
Multiple signals from different transmitters is a challenge with the KrakenSDR because there is no way to inspect the packets and seperate them from one another. To do that, you’d need to write a custom decoder for the particular packet format and slice them up yourself.
If you’re just grabbing the three signals in one integration block, then you’re going to see an aggregate with the stronger or longer signal dominating.
Must I use parameter DOA Algorithm MUSIC?
Using MUSIC is the best choice in almost all situations.
Must I set parameter RF Station with MUSIC to the value of 3?
If all signals are in the same integration block, then yes you can try set the expected number of sources to 3. But be aware that trying to DOA multiple sources on the same frequency doesn’t always give good results.
Do I recognize the result on DOA Estimation screen?
Ideally you’d see three peaks. If they are close to one another in terms of direction of arrival, then the source peaks could combine and cause issues.
Do I recognize the result of these three bearings (three transmitters) on the map? Please send some further information.
If you’re using the heatmap on the app, you will in the best case see three hotspots corresponding to the three transmitter bearings.