a method of synchronizing carrier frequencies in a mobile radio network having base and mobile stations , in which a synchronization signal is radiated from the base stations , is received by the mobile stations and is used to derive the transmission frequency . a group of sinusoidal oscillations having different frequencies is emitted from each base station as a synchronization signal . the mobile stations each have a matched filter , with which at least one of the transmitted sinusoidal oscillations can be found and detected . the method is insensitive to fading , and permits an extensive normalization of the circuits in the base stations and , in particular , permits a unified evaluation in the mobile stations .