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

MIMO radar system

A technology of radar system and transmitting antenna, applied in the field of MIMO radar system of motor vehicle

Pending Publication Date: 2021-08-27
ROBERT BOSCH GMBH
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The applicant has proposed a MIMO radar system in which the repetition rate of the multiplexed sequence is below the Nyquist limit of the single-valued Doppler measurement, so that the relative velocity measurement results although have high resolution rate, but multivalued (mehrdeutig)

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
  • MIMO radar system
  • MIMO radar system
  • MIMO radar system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0037] according to Figure 1 to Figure 5 , an embodiment of a fast-chirped MIMO radar system is illustrated as an example of a FMCW-MIMO radar system. figure 1 The structure of the analog part of the radar system is shown schematically and in simplified form.

[0038] The frequency modulation device 10 controls an RF oscillator 12 which generates a signal sequence in the form of a frequency ramp for a plurality of transmit antennas 14 . Arranged in each of the multiple transmission channels is an amplifier 16 which either blocks the signal or transmits the signal in amplified form to the associated antenna. Multiplexing device 18 according to time division and frequency division multiplexing scheme 20 ( figure 2 ) operate oscillator 12 and amplifier 14 in such a way that each of transmit antennas 14 transmits a frequency-modulated signal in a defined frequency subband within a defined time slot.

[0039] The signal transmitted and reflected on the object 24 is received by...

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 a MIMO radar system. The system includes transmitter and receiver arrays, and a control and evaluation unit, designed to: transmit transmission signals according to a time and frequency multiplex scheme in each of multiple repeatedly implemented measuring cycles, the time space and frequency space being divided into non-overlapping time slots and frequency sub-bands and only one single transmitting antenna being active in each time slot and transmitting in only one single frequency sub-band, carry out preliminary distance estimations and Doppler estimations, each based on signals of an individual transmitting antenna, in a first evaluation stage based on signals received in one measuring cycle, and carry out joint distance, Doppler, and angle estimations using a multi-dimensional estimation algorithm in a second evaluation stage based on phases of the signals transmitted by various transmitting antennas, results of the first evaluation stage being refined by increasing the accuracy and / or by eliminating ambiguities.

Description

technical field [0001] The invention relates to a MIMO radar system, in particular a MIMO radar system for a motor vehicle. Background technique [0002] Radar systems are used in motor vehicles to an increasing extent to detect the traffic environment and to provide one or more safety or comfort functions with the distance and relative speed of located objects such as vehicles or obstacles The one or more safety functions or comfort functions relieve the driver of the driving of the motor vehicle or completely or partially replace the human driver. MIMO (multiple input-multiple output) systems are increasingly used here, in which multiple transmit and receive antennas are used. [0003] WO 2018 / 076005 A1 mentions different types of MIMO radar systems: the transmitters and / or receivers can be arranged in different positions and can use time division multiplexing methods, TDMA (Time Division Multiple Access, time division multiple access) Division multiplexing method, FDMA ...

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): G01S13/02G01S13/08G01S13/32G01S13/58G01S3/46G01S3/48
CPCG01S13/02G01S13/08G01S13/32G01S13/58G01S13/584G01S3/46G01S3/48G01S13/931G01S13/42G01S13/343G01S7/354G01S7/42H04B7/0413G01S7/2813G01S7/414
Inventor G·哈科拜恩M·贡泽尔
Owner ROBERT BOSCH GMBH