A device for determining at least one feature of a wireless transmission channel (I 1,I 2) between on the one hand a useful signal transmitter for transmitting a binary useful signal and a compensation signal transmitter for transmitting a binary compensation signal and on the hand a receiver, wherein the transmission channel comprises a first transmission path (I 1) to be determined in terms of its features between the useful signal transmitter and the receiver, and a second transmission path (I 2) known in terms of its features, and wherein the useful signal transmitter and the compensation signal transmitter are operable in a clocked manner, comprising - a one-bit-analog-to-digital-converter (22,9,10a,10b,10c) which comprises an input coupled via the receiver to the useful signal transmitter and an output for delivering a digital signal, - wherein the one-bit-analog-to-digital-converter (22,9,10a,10b,10c) comprises an inverter having a switching threshold and having an inverter input coupled to the input of the one-bit-analog-to-digital-converter (22,9,10a,10b,10c) as well as an inverter output coupled to the output of the one-bit-analog-to-digital-converter (22,9,10a, 10b,10c), a low-pass filter (10a,10b,10c) for feeding back the output of the one-bit-analog-to-digital-converter (22,9,10a,10b, 10c) to the inverter input, and a high-pass filter, particularly in form of a capacitor, between the input of the one-bit-analog-to-digital-converter (22,9,10a,10b,10c) and the inverter input, - a scalar product unit which comprises a multiplication unit for determining the product between the output signal of the one-bit-analog-to-digital-converter (22,9,10a,10b,10c) and a binary control signal for the useful signal transmitter, and a filter with integrating filter effect for forming the scalar product result signal, - wherein the multiplication unit comprises an EXOR gate for multiplication of the one-bit output signal at the output of the one-bit-analog-to-digital-converter (22,9,10a,10b, 10c) with the control signal for the useful signal transmitter, - a further multiplication unit for multiplication of the output signal (15 or 29) of the filter with a second signal which is equal to the logically inverted control signal for the useful signal transmitter, and - a compensation signal generation unit for generating a binary control signal for the compensation signal transmitter for transmitting the compensation signal via the second transmission path (I 2) to the receiver where the compensation signal and the useful signal overlap to an equal signal, - wherein the compensation signal generation unit comprises a digital-to-analog-converter for converting the filter output signal (15 or 29) multiplied with the second signal into an analog signal as a control signal for the compensation signal transmitter, and - wherein the feature of the first transmission path (I 1) is determinable by means of the scalar product result signal. - a one-bit-analog-to-digital-converter (22,9,10a,10b,10c) which comprises an input coupled via the receiver to the useful signal transmitter and an output for delivering a digital signal, - wherein the one-bit-analog-to-digital-converter (22,9,10a,10b,10c) comprises an inverter having a switching threshold and having an inverter input coupled to the input of the one-bit-analog-to-digital-converter (22,9,10a,10b,10c) as well as an inverter output coupled to the output of the one-bit-analog-to-digital-converter (22,9,10a, 10b,10c), a low-pass filter (10a,10b,10c) for feeding back the output of the one-bit-analog-to-digital-converter (22,9,10a,10b, 10c) to the inverter input, and a high-pass filter, particularly in form of a capacitor, between the input of the one-bit-analog-to-digital-converter (22,9,10a,10b,10c) and the inverter input, - a scalar product unit which comprises a multiplication unit for determining the product between the output signal of the one-bit-analog-to-digital-converter (22,9,10a,10b,10c) and a binary control signal for the useful signal transmitter, and a filter with integrating filter effect for forming the scalar product result signal, - wherein the multiplication unit comprises an EXOR gate for multiplication of the one-bit output signal at the output of the one-bit-analog-to-digital-converter (22,9,10a,10b, 10c) with the control signal for the useful signal transmitter, - a further multiplication unit for multiplication of the output signal (15 or 29) of the filter with a second signal which is equal to the logically inverted control signal for the useful signal transmitter, and - a compensation signal generation unit for generating a binary control signal for the compensation signal transmitter for transmitting the compensation signal via the second transmission path (I 2) to the receiver where the compensation signal and the useful signal overlap to an equal signal, - wherein the compensation signal generation unit comprises a digital-to-analog-converter for converting the filter output signal (15 or 29) multiplied with the second signal into an analog signal as a control signal for the compensation signal transmitter, and - wherein the feature of the first transmission path (I 1) is determinable by means of the scalar product result signal.