Patent Number: 7,714,771

Title: Method and device for measuring the distance and relative speed of multiple objects

Abstract: A method and device are provided for measuring distance and relative speed of a plurality of objects with the aid of an FMCW radar, transmitted signals being reflected by objects, and the reflected signals being received and mixed with the transmitted signals. A combination of distance and relative speed values is assigned to the mixer output frequencies of each frequency ramp for each object, and the distance and relative speed of a possible object are determined from points of intersection of a plurality of distance and relative speed combinations. The apparent (unreal) objects are eliminated by modifying the frequency slope of at least one frequency ramp according to the random principle in a subsequent measurement cycle.

Inventors: Lehre; Klaus (Malsch, DE), Wackerl; Oliver (Kirchheim an der Teck, DE), Hilsebecher; Joerg (Hildesheim, DE), Hauk; Joachim (Renningen-Malmsheim, DE), Reiche; Martin (Weil der Stadt, DE), Randler; Martin (Immenstaad, DE), Jordan; Ruediger (Stuttgart, DE)

Assignee: Robert Bosch GmbH

International Classification: G01S 13/32 (20060101); G01S 13/42 (20060101); G01S 13/50 (20060101); G01S 13/00 (20060101); G01S 13/93 (20060101)

Expiration Date: 5/11/12018