A method for detecting at least one object located in the vicinity of a vehicle based on the reception of ultrasound signals transmitted by a transmitter and reflected by the object, wherein, in the method, - at least one ultrasound transmitter and an ultrasound receiver associated thereto are provided, - the ultrasound transmitter transmits an ultrasound transmission signal, - the ultrasound receiver receives an ultrasound reception signal, - the ultrasound reception signal is correlated with the ultrasound transmission signal and a correlation factor is determined, and - it is determined based on the size of the correlation factor, whether the ultrasound reception signal - is an interference signal or - an ultrasound signal transmitted by another ultrasound transmitter not associated to the ultrasound receiver, or - an ultrasound transmission signal of a another ultrasound transmitter not associated to the ultrasound receiver, which signal is reflected from an object, or - an ultrasound transmission signal of the ultrasound transmitter associated to the ultrasound receiver, which signal is reflected from an object, characterized in - that the correlation factor is determined by - the ultrasound reception signal being subjected to an I/Q demodulation in which a complex signal having a real part signal and an imaginary part signal is formed, each of which is filtered by means of a respective first optimal filter to form an envelope signal, whereafter an absolute value is performed using the filtered real part and imaginary part signals (I, Q), - in addition, respectively normalizing both the real part signal and the imaginary part signal, - filtering both the normalized real part signal (I') and the normalized imaginary part signal (Q') by means of a respective second optimal filter, wherein the first and second optimal filters are essentially identical, and - determining the correlation factor as a value of the complex signal from the normalized real part and imaginary part signals (I', Q'). - at least one ultrasound transmitter and an ultrasound receiver associated thereto are provided, - the ultrasound transmitter transmits an ultrasound transmission signal, - the ultrasound receiver receives an ultrasound reception signal, - the ultrasound reception signal is correlated with the ultrasound transmission signal and a correlation factor is determined, and - it is determined based on the size of the correlation factor, whether the ultrasound reception signal - is an interference signal or - an ultrasound signal transmitted by another ultrasound transmitter not associated to the ultrasound receiver, or - an ultrasound transmission signal of a another ultrasound transmitter not associated to the ultrasound receiver, which signal is reflected from an object, or - an ultrasound transmission signal of the ultrasound transmitter associated to the ultrasound receiver, which signal is reflected from an object, characterized in - is an interference signal or - an ultrasound signal transmitted by another ultrasound transmitter not associated to the ultrasound receiver, or - an ultrasound transmission signal of a another ultrasound transmitter not associated to the ultrasound receiver, which signal is reflected from an object, or - an ultrasound transmission signal of the ultrasound transmitter associated to the ultrasound receiver, which signal is reflected from an object, characterized in - that the correlation factor is determined by - the ultrasound reception signal being subjected to an I/Q demodulation in which a complex signal having a real part signal and an imaginary part signal is formed, each of which is filtered by means of a respective first optimal filter to form an envelope signal, whereafter an absolute value is performed using the filtered real part and imaginary part signals (I, Q), - in addition, respectively normalizing both the real part signal and the imaginary part signal, - filtering both the normalized real part signal (I') and the normalized imaginary part signal (Q') by means of a respective second optimal filter, wherein the first and second optimal filters are essentially identical, and - determining the correlation factor as a value of the complex signal from the normalized real part and imaginary part signals (I', Q'). - the ultrasound reception signal being subjected to an I/Q demodulation in which a complex signal having a real part signal and an imaginary part signal is formed, each of which is filtered by means of a respective first optimal filter to form an envelope signal, whereafter an absolute value is performed using the filtered real part and imaginary part signals (I, Q), - in addition, respectively normalizing both the real part signal and the imaginary part signal, - filtering both the normalized real part signal (I') and the normalized imaginary part signal (Q') by means of a respective second optimal filter, wherein the first and second optimal filters are essentially identical, and - determining the correlation factor as a value of the complex signal from the normalized real part and imaginary part signals (I', Q').