Receiving positioning signals at different frequencies and obtaining information about the time taken to switch a receiver between the frequencies

摘要

A method and a receiver 100 for receiving positioning signals are disclosed. The positioning signals are received from a plurality of first sources in a first frequency range (e.g. GPS 110) and from a plurality of second sources in a second frequency range different to the first frequency range (e.g. GLONASS 120). The receiver 100 is switched between the first and second frequency ranges to receive the positioning signals, and the receiver obtains time offset information about a time taken to switch the receiver between the first and second frequency ranges, by obtaining a solution to a set of simultaneous equations based on combined navigation data for the first and second sources. The time offset information may be used to compensate pseudoranges to provide more accurate location coordinates of the receiver 100.