Data receiver , wherein the data receiver is configured to receive at least one signal of a data transmitter in order to obtain at least one environmental parameter of the data transmitter or of surroundings of the data transmitter , wherein the data receiver is configured to take a comparison between - the at least one obtained environmental parameter or an environmental parameter trend ascertained on the basis of the at least one obtained environmental parameter and - an environmental parameter reference profile describing an expected environmental parameter or an expected environmental parameter trend in the surroundings of the data transmitter as a basis for detecting an operating state of the data transmitter or of a component of the data transmitter , characterized in that the at least one signal comprises the respective environmental parameter in a piece of modulated primary information and the data receiver is configured to extract a respective signal parameter from the modulated primary information in order to obtain the at least one environmental parameter , wherein the modulated primary information represents an ID of the data transmitter, a synchronization sequence, payload data and/or dummy data, and wherein the signal parameter is - a reception carrier frequency, - a reception time, - a reception symbol rate, - a reception modulation index, - a Doppler frequency, - a signal-to-noise ratio, - a signal power, - a channel phase, - a channel attenuation, - a channel dispersion and/or - a polarization rotation or a change therein. wherein the data receiver is configured to receive at least one signal of a data transmitter in order to obtain at least one environmental parameter of the data transmitter or of surroundings of the data transmitter , wherein the data receiver is configured to take a comparison between - the at least one obtained environmental parameter or an environmental parameter trend ascertained on the basis of the at least one obtained environmental parameter and - an environmental parameter reference profile describing an expected environmental parameter or an expected environmental parameter trend in the surroundings of the data transmitter - the at least one obtained environmental parameter or an environmental parameter trend ascertained on the basis of the at least one obtained environmental parameter and - an environmental parameter reference profile describing an expected environmental parameter or an expected environmental parameter trend in the surroundings of the data transmitter as a basis for detecting an operating state of the data transmitter or of a component of the data transmitter , characterized in that the at least one signal comprises the respective environmental parameter in a piece of modulated primary information and the data receiver is configured to extract a respective signal parameter from the modulated primary information in order to obtain the at least one environmental parameter , wherein the modulated primary information represents an ID of the data transmitter, a synchronization sequence, payload data and/or dummy data, and wherein the signal parameter is - a reception carrier frequency, - a reception time, - a reception symbol rate, - a reception modulation index, - a Doppler frequency, - a signal-to-noise ratio, - a signal power, - a channel phase, - a channel attenuation, - a channel dispersion and/or - a polarization rotation - a reception carrier frequency, - a reception time, - a reception symbol rate, - a reception modulation index, - a Doppler frequency, - a signal-to-noise ratio, - a signal power, - a channel phase, - a channel attenuation, - a channel dispersion and/or - a polarization rotation or a change therein. <EOS>