METHOD FOR DETECTING TARGET ECHOES IN A RECEIVED SIGNAL OF AN ULTRASONIC SENSOR OF A MOTOR VEHICLE, ULTRASONIC SENSOR DEVICE, AND MOTOR VEHICLE

摘要

The invention relates to a method for detecting target echoes (11) in a received signal (ES) of an ultrasonic sensor of a motor vehicle, having the steps of providing a reference signal (RS) for decoding the received signal (ES), a correlation input signal (RS) being provided for a plurality of specified frequency shift values by shifting the frequency of the reference signal (RS) by the respective frequency shift value; separately correlating the received signal (ES) to each of the correlation input signals (RS) and thereby providing respective correlation output signals (KS1 to KS7) as the result of each correlation; and providing a composite signal (SS) as the sum of the correlation output signals (KS1 to KS7), wherein one of the correlation output signals (KS1 to KS7) is selected using the composite signal (SS), and the detection of the target echoes (11) is carried out by analyzing the selected correlation output signal (KS1 to KS7).