Sensor system with a feedback of a compensation supply signal for detecting the distance or properties of at least one object (O1, O2) in an optical transmission path between a transmitter and a receiver, wherein the system is based on feedback control; comprising - an optical transmitter and a receiver, - wherein the transmitter is triggered by a supply signal to transmit a known transmission signal of the transmitter into the transmission path, which transmission signal, after passing through at least a part of the transmission path and being influenced by an object (O1, O2), reaches a receiver and is received by the receiver as reception signal, - wherein the receiver generates a receiver output signal with a receiver output signal portion (SOe) from the reception signal, - wherein a compensation supply signal is fed to the receiver and the compensation supply signal is superimposed with the reception signal, - a processing unit for further processing a processing interim signal comprising the receiver output signal and for separating at least one receiver output signal portion (SOe) and creating control value signals (yi i,j) therefrom, - a reverse transformation unit which refeeds one of the further processed control value signals (yi i,j) in a feedback loop so that the refed control value signal (yi i,j) is present at the receiver, - a signal-creating unit that generates base signals, - the signal-creating unit comprises a wavelet generator that generates wavelets (s i,j) as base signals, and the wavelet generator for each system period generates a primary wavelet (s 1,1, s 1,1_a, s 1,1_b) as base signal, which is periodic with a primary wavelet period (P, Pa, Pb), wherein - a control value signal (yi i,j (t)) is a measure for the property or the distance of an object, characterized in that - base signals of the signal-creating unit are not orthogonal to one another; - the processing unit generates the control value signals by multiplying the processing interim signal by each base signal so that for each base signal a control value signal (yi i,j) is formed; - a non-linear filter is arranged between the processing unit and the reverse transformation unit, - the non-linear filter is designed in such a manner that the maximum of control value signals (yi i,j) is searched for and thus the control value signal (yi i,j) is selected and output as NLF-output signal (nf i,j), which is a measure for the property or the distance of an object, and - the supply signal is formed from the sum of the base signals and is supplied to the transmitter, and - the reverse transformation unit carries out a compensation reverse transformation with the NLF-output signal (nf i,j), wherein the NLF-output signal (nf i,j) is multiplied by the corresponding base signals, and the compensation supply signal is formed by summation, which supply signal is fed to the receiver and is superimposed with the reception signal. - an optical transmitter and a receiver, - wherein the transmitter is triggered by a supply signal to transmit a known transmission signal of the transmitter into the transmission path, which transmission signal, after passing through at least a part of the transmission path and being influenced by an object (O1, O2), reaches a receiver and is received by the receiver as reception signal, - wherein the receiver generates a receiver output signal with a receiver output signal portion (SOe) from the reception signal, - wherein a compensation supply signal is fed to the receiver and the compensation supply signal is superimposed with the reception signal, - a processing unit for further processing a processing interim signal comprising the receiver output signal and for separating at least one receiver output signal portion (SOe) and creating control value signals (yi i,j) therefrom, - a reverse transformation unit which refeeds one of the further processed control value signals (yi i,j) in a feedback loop so that the refed control value signal (yi i,j) is present at the receiver, - a signal-creating unit that generates base signals, - the signal-creating unit comprises a wavelet generator that generates wavelets (s i,j) as base signals, and the wavelet generator for each system period generates a primary wavelet (s 1,1, s 1,1_a, s 1,1_b) as base signal, which is periodic with a primary wavelet period (P, Pa, Pb), wherein - a control value signal (yi i,j (t)) is a measure for the property or the distance of an object, characterized in that - base signals of the signal-creating unit are not orthogonal to one another; - the processing unit generates the control value signals by multiplying the processing interim signal by each base signal so that for each base signal a control value signal (yi i,j) is formed; - a non-linear filter is arranged between the processing unit and the reverse transformation unit, - the non-linear filter is designed in such a manner that the maximum of control value signals (yi i,j) is searched for and thus the control value signal (yi i,j) is selected and output as NLF-output signal (nf i,j), which is a measure for the property or the distance of an object, and - the supply signal is formed from the sum of the base signals and is supplied to the transmitter, and - the reverse transformation unit carries out a compensation reverse transformation with the NLF-output signal (nf i,j), wherein the NLF-output signal (nf i,j) is multiplied by the corresponding base signals, and the compensation supply signal is formed by summation, which supply signal is fed to the receiver and is superimposed with the reception signal.