Filling level measuring device for measuring a fill level, the filling level measuring device comprising: a signal generation unit designed for generating and transmitting a transmission signal towards the fill medium; a signal acquisition and processing unit designed for acquisition of an echo curve corresponding to a reflected part of the transmission signal; wherein the signal acquisition and processing unit is further designed to carry out the steps of: identifying at least one echo of the echo curve; determining a relative sign of an amplitude value of the echo in relation to a corresponding relative amplitude value of the transmission signal or determining a relative phase of the echo in relation to a corresponding phase of the transmission signal; allocating the echo to a first echo track which is related to previous echoes of previously acquired echo curves, if an amplitude value of a first echo of the previous echoes of the first echo track has the same sign as the amplitude value of the echo of the echo curve, or if a relative phase value of the first echo is identical to the relative phase value of the echo; preventing allocation of the echo to the first echo track, if the amplitude value of the first echo of the previous echoes of the first echo track has a different sign as the amplitude value of the echo, or if the relative phase value of the first echo is not identical to the relative phase value of the echo. a signal generation unit designed for generating and transmitting a transmission signal towards the fill medium; a signal acquisition and processing unit designed for acquisition of an echo curve corresponding to a reflected part of the transmission signal; wherein the signal acquisition and processing unit is further designed to carry out the steps of: identifying at least one echo of the echo curve; determining a relative sign of an amplitude value of the echo in relation to a corresponding relative amplitude value of the transmission signal or determining a relative phase of the echo in relation to a corresponding phase of the transmission signal; allocating the echo to a first echo track which is related to previous echoes of previously acquired echo curves, if an amplitude value of a first echo of the previous echoes of the first echo track has the same sign as the amplitude value of the echo of the echo curve, or if a relative phase value of the first echo is identical to the relative phase value of the echo; preventing allocation of the echo to the first echo track, if the amplitude value of the first echo of the previous echoes of the first echo track has a different sign as the amplitude value of the echo, or if the relative phase value of the first echo is not identical to the relative phase value of the echo. identifying at least one echo of the echo curve; determining a relative sign of an amplitude value of the echo in relation to a corresponding relative amplitude value of the transmission signal or determining a relative phase of the echo in relation to a corresponding phase of the transmission signal; allocating the echo to a first echo track which is related to previous echoes of previously acquired echo curves, if an amplitude value of a first echo of the previous echoes of the first echo track has the same sign as the amplitude value of the echo of the echo curve, or if a relative phase value of the first echo is identical to the relative phase value of the echo; preventing allocation of the echo to the first echo track, if the amplitude value of the first echo of the previous echoes of the first echo track has a different sign as the amplitude value of the echo, or if the relative phase value of the first echo is not identical to the relative phase value of the echo.