Abstract: A GPS system is configured to manage interference from disturbing signals. The system includes an antenna, an RF front end unit, a filtering unit, amplifying circuits, a carrier recovery unit, a correlation unit, and a calculating unit that performs range calculations. A multiplying unit, which is positioned between the carrier recovery unit and the correlation unit, is adapted to multiply the signal from the carrier recovery unit to the correlation unit with either zeros, “0”, or ones, “1”, and a control logic unit is configured to control the multiplying unit into using zeros, “0”, if interference is detected and into using ones, “1”, if no interference is detected.