Patent ID: 6940449
Filing Date: 2005-09-06
Classification: G01S

Abstract:
1. A method for eliminating dummy objects in short-range pulse radar sensors, in which radar pulses are transmitted at a defined frequency, and the time until they are reflected by an object and received again is measured, and besides the transmitted pulse (TX pulse), a delayed second pulse (RX pulse) is generated, the transmitted pulses (TX pulses) and the additionally generated second pulses (RX pulses), delayed relative to them are modulated by a binary phase-shift keying process,and wherein the transmitted pulses (TX pulse) and the additionally generated second pulses (RX pulses) delayed relative to them are modulated by introducing a phase shift of 180° between the transmitted pulses (TX pulses) and the delayed second pulses (RX pulses) in such a way that at least two successive pulses always have the same phase, and at least the next two pulses are shifted by 180°.