Unlock instant, AI-driven research and patent intelligence for your innovation.

Calibration of a radar system

A technology of radar and signal, applied in the field of radar sensor

Pending Publication Date: 2020-10-27
INFINEON TECH AG
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in radar systems with multiple radar MMICs, phase calibration can involve some challenges that do not arise in single-chip solutions

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Calibration of a radar system
  • Calibration of a radar system
  • Calibration of a radar system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] figure 1 A conventional FMCW radar sensor 1 is illustrated. In this example, separate transmit (TX) and receive (RX) antennas 5 and 6 respectively (bistatic or pseudo-monostatic radar configuration) are used. Note, however, that a single antenna can be used such that the receive and transmit antennas are physically identical (monostatic radar configuration). The transmit antenna 5 (quasi-) continuously radiates the RF signal s RF (t), which is eg frequency modulated by a sawtooth signal. When the radiation signal s RF (t) Backscattered RF signal y is received by receive antenna 6 when backscattered from an object T that may be located in the field of view of the radar system RF (t). Object T is often referred to as a "radar target". In a more general example, several targets may be in the radar sensor's field of view, and an antenna array may be used instead of a single RX antenna. Similarly, an antenna array can be used instead of a single TX antenna. The use o...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to calibration of a radar system. A method for calibrating a radar system is described and includes generating an RF oscillator signal and distributing the RF oscillator signal to a plurality of phase shifters each providing a respective phase-shifted RF oscillator signal; receiving the phase-shifted RF oscillator signals by corresponding radar chips and radiating the phase-shifted RF oscillator signal via a first RF output channel of a first one of the radar chips; receiving a back-scattered signal by at least one RF input channel of each radar chip and generating a plurality of base-band signals by down-converting the received signals into a base band using the phase-shifted RF oscillator signals received by the corresponding radar chips; determining a phase for each base-band signal; and adjusting the phase shifts caused by the phase shifters such that the phases of the base-band signals match a predefined phase-over-antenna-position characteristic.

Description

technical field [0001] The present disclosure relates to the field of radar sensors, and more particularly to a novel concept of calibrating radar systems having multiple input and multiple output channels. Background technique [0002] Radar sensors can be found in many sensing applications that measure the distance and velocity of objects. In the automotive sector, there is an increasing demand for radar sensors that can be used in so-called advanced driver assistance systems (ADAS). Examples of advanced driver assistance systems are "adaptive cruise control" (ACC) and "radar cruise control" systems. Such systems could be used to automatically adjust a car's speed to maintain a safe distance from other cars driving ahead. Another example of an advanced driver assistance system is a blind spot monitor, which utilizes radar sensors to detect other vehicles in the vehicle's blind spots. In particular, autonomous vehicles may use many sensors, such as radar sensors, to dete...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/40G01S13/58G01S13/06G01S13/931
CPCG01S7/40G01S13/58G01S13/06G01S13/931G01S7/4008G01S7/4052G01S13/343G01S13/4454G01S13/584G01S7/028G01S7/403G01S7/4078G01S7/4026G01S13/003G01S13/87G01S2013/93275G01S13/282G01S7/354G01S13/347G01S7/282
Inventor G·伊特金M·荣格
Owner INFINEON TECH AG