Abstract: The object of the invention is a positioning system for positioning at least one mobile device (100) by utilizing radio frequency technology on a positioning area of said system. The system comprises at least one stationary base station (106), i.e. a transceiver, which comprises at least one antenna (102, 104) for transmitting signals comprising at least position information to at least one mobile device (100), which comprises at least one antenna (108) for receiving said signals. The system comprises as said mobile device (100) an electronics unit for measuring at least intensities of received signals and for processing and storing received signals, which comprises position information, and for transmitting signals, which comprise at least position information, through its antenna (108) automatically and/or upon request to said at least one stationary base station (106).