Method and apparatus for radar signal processing

US7791528B2 · kind B2 · utility

Assignee

• Autoliv ASP, Inc. · US

Inventors

• Dirk Klotzbuecher · Mainstockheim, DE
• Walter Poiger · Bad Neustadt an der Saale, DE

Key dates

• Filing date: Nov 24, 2008
• Grant date: Sep 7, 2010
• Expiry date: Mar 20, 2029

Classification

• Technology area (CPC G): Physics
• CPC primary: G01S13/347
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A radar apparatus and method for determining the range to and velocity of at least one object comprising, transmitting a plurality of RF signals, each comprising a particular frequency and being transmitted during a particular unique finite period, the plurality of signals collectively comprising at least one first subset of signals having the same frequency and at least one second subset of signals having different frequencies, receiving the plurality of signals after reflection from an object, determining a phase difference between each of the signals and the corresponding reflected signal, each piece of phase difference information herein termed a sample, organizing the samples in two-dimensions wherein, in a first dimension, all samples have the same frequency and, in a second dimension, all consecutive samples are separated from each other by a fixed time interval; processing the samples in the first dimension to determine a phase rotation frequency corresponding to the samples in the first dimension, the phase rotation frequency comprising a Doppler frequency for the at least one object, processing the samples in the second dimension to determine a second phase rotation frequ…