I am trying to build a real time location system(RTLS). I have a arena of 10 x 10 meters in dimension. And would like to track the position of the object moving in the arena with a precision of within few centimeters (5 cm tolerance say). I could attach a transceiver with the moveable object if I like. Besides the moveable object there could other object scattered or erected in the arena. I know if I could measure distance of the object from at least 3 predefined positions, I could solve equations to find the coordinate of the object.
The problem I am into is the method to find the distance of an object from any fixed place.
What could be the best method to use considering the accuracy required and working dimensions of the arena minimizing the cost?