Your project is too good .But to see the position of the ball what are you using ??
Means You are using tha camera .
And in which language you will code in PC.
or any else.
Just like your project there is competetion FIRA.
You must watch vedio on www.fira.net
11 vs 11
that is very nice.
And wireless communication is not a problem here .You can use Wi-Fi
or you can use GSM also .
Or if you want a small distance robot than you may also use simple transmitter and receiver .
Firstly you must code in the PC.
that is tough in this project ......
Best Of Luck ..........