Method for testing received signal for its origin, where signal is received from ultrasonic sensor of motor vehicle, involves modulating transmission signal of ultrasonic sensor and impressing predetermined code word on transmission signal

摘要

#CMT# #/CMT# The method involves modulating a transmission signal of the ultrasonic sensor (3,5) and impressing a predetermined code word on the transmission signal by this modulation. The received signal is compared with the reference signal. The origin of the received signal is determined corresponding to the result of the comparison. The frequency shift of the received signal is determined against the transmission signal before comparison of the received signal with the reference signal. The received signal is compared with the transmission signal as reference signal. #CMT# : #/CMT# An independent claim is included for a driver assistance device for a motor vehicle. #CMT#USE : #/CMT# Method for testing a received signal for its origin, where the signal is received from an ultrasonic sensor of a motor vehicle (Claimed). #CMT#ADVANTAGE : #/CMT# The frequency shift of the received signal is determined against the transmission signal before comparison of the received signal with the reference signal, where the received signal is compared with the transmission signal as reference signal, where the transmission signal is shifted in its frequency to the determined frequency shift, and thus enables reducing the probability of a mistake when allocating the sound signals to the ultrasonic sensors and ensures high accuracy of the correlation of the determination of origin of the received signal in an efficient manner, and also ensures economical and accurate determination of the degree of similarity between the received signal and the reference signal without much effort. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a top view of a motor vehicle with a driver assistance device. 1 : Motor vehicle 2 : Driver assistance device 3,5 : Ultrasonic sensors 4 : Front bumper 7 : Control unit.