I'd like to track my run in an indoor tennis court. GPS won't be available so I was thinking researching for other solutions:
Accelerometer: I concluded it's a no go because while playing tennis the player makes a lot of movements that include spinning his body that can alter the data.
Then I thought that a 3/4 point IR system might help but again from what I've understood it's hard for the IR system to track the movement since they won't be able to focus on the player.
So my final thought went to radio systems but I couldn't find any info and it's also hard for me to see a theoretical solution at least on how I can mesure the movement/speed of the player.
So here is my question: Is there any existing system that is able to track random movement of an object (athlete) and give info like speed and distance? is there anywhere resources about how such a system might be achieved or at least the exact technology used for it?
Any suggestions and ideas are greatly appreaciated.