FMCW radar sensor including synchronized high-frequency modules

US11327152B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Marcel Mayer · Stuttgart, DE
• Klaus Baur · Mietingen, DE
• Michael Schoor · Stuttgart, DE

Key dates

• Filing date: Jul 12, 2018
• Grant date: May 10, 2022
• Expiry date: Jan 16, 2039

Classification

• Technology area (CPC G): Physics
• CPC primary: G01S7/356
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

FMCW radar sensor including multiple high-frequency modules, which are synchronized with one another by a synchronization signal. At least one includes a transmitting part for generating a frequency-modulated transmit signal. At least two high-frequency modules, physically separated from one another, each include a receiving part for receiving a radar echo, each receiving part being assigned a mixer, which generates an intermediate frequency signal by mixing the received signal with a portion of the transmit signal, and an evaluation unit. The evaluation unit is designed to record the intermediate frequency signal over a measuring period as a function of time, and to subject the time signal thus obtained to a Fourier transform. At least one of the evaluation units is designed to window the time signal before the Fourier transform using a complex-valued window function to compensate for a propagation time difference of the synchronization signal between the receiving parts.