unmanned ground vehicle

Hi, I am working on design of an unmanned vehicle , i want to know how to choose a communication channel or device. I have to transmit 640 x 480 px at 10 frames/sec. and area to span is 500m or more Non Line of Sight. I have read about XBee will it suit my requirement ? is this calculation correct: 640 x 480 x 10~ 3mbps is the data rate. If anyone has worked on this please guide me..