Communications: directive radio wave systems and devices (e.g. – Return signal controls external device – Radar mounted on and controls land vehicle
Reexamination Certificate
2008-06-10
2008-06-10
Tarcza, Thomas H. (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Return signal controls external device
Radar mounted on and controls land vehicle
C342S109000, C342S115000, C342S195000
Reexamination Certificate
active
07385550
ABSTRACT:
Distance and velocity measuring at a plurality of objects using FMCW radar includes repeating measurements using different frequency ramps and including mixing transmitted and received signals, and recording the mixed signal's spectrum. A matching includes recording spectra peaks for ramps, if belonging to the same object, allocating them to each other, and calculating distances and velocities from peak frequencies. A tracking includes identifying with one another objects measured at various times based on distance and velocity consistency. Each measuring cycle includes less than four measurements with different frequency ramps. For each plausible two peak combination recorded, respectively, during first and second measurements of a cycle, distance and velocity of one possible object represented by these peaks are calculated. A measurement's anticipated result, is calculated from distance and velocity of the possible object, discarded if an anticipated result does not agree with the measured result.
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“Adaptive Cruise Control,” Automotive Electronics Handbook,published by Ronald K. Jurgen, 2ndedition, McGraw-Hill Inc., Chapter 30.1 (1999).
Ulbricht Dirk
Winter Klaus
Barker Matthew M
Kenyon & Kenyon LLP
Robert & Bosch GmbH
Tarcza Thomas H.
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