Automotive anti-collision radar detection-communication integrated function realization method

A technology of anti-collision radar and implementation method, which is applied in the direction of measuring device, radio wave measurement system, radio wave reflection/reradiation, etc., and can solve the problem of weak backscattered signal energy, low scattered signal energy, and reduced system reliability, etc. problem, achieve good stability and anti-interference ability, and reduce the effect of system bit error rate

Pending Publication Date: 2020-02-14
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

However, due to the low energy of the backscattered signal from the tag, it weakens rapidly with the increase of distance
In the actual road environment, the backscattered signal of the tag will be submerged in the vehicle road target echo, clutter and noise, whi

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  • Automotive anti-collision radar detection-communication integrated function realization method
  • Automotive anti-collision radar detection-communication integrated function realization method
  • Automotive anti-collision radar detection-communication integrated function realization method

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Embodiment Construction

[0015] The technical solution of the invention will be described in detail below in conjunction with the accompanying drawings.

[0016] The invention proposes a method for realizing the integrated function of automobile anti-collision radar detection-communication. The method is to design a FMCW radar backscatter communication system based on spread spectrum coding. The system block diagram is as follows figure 1 shown. The system consists of a 77GHz FMCW millimeter wave radar and a backscatter tag containing different tag information. The radar equipment is responsible for signal transmission and reception. The echo signal is composed of tag target backscatter modulation signal, vehicle target echo, clutter and noise. The echo signal is pre-processed by receiver mixing and filtering, and then sampled by ADC. The signal processing module is responsible for echo signal processing and tag information extraction. The tag device is responsible for loading the tag information i...

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Abstract

The invention discloses an automotive anti-collision radar detection-communication integrated function realization method, and belongs to the technical field of radar and wireless communication. The automotive anti-collision radar detection-communication integrated function is realized by adding a label identification function of a roadside traffic sign for a forward anti-collision radar by utilizing a back-scattering communication technology. For the problems of high label identification error rate caused by the condition that the back-scattering signal is weak in energy and can be easily influenced by the target echo, clutter and noise of a vehicle, the invention provides a frequency modulated continuous wave radar back-scattering communication system design method based on spread spectrum encoding, a direct sequence spread spectrum technology is introduced into the back-scattering modulation of the label, and a label back-scattering signal is enhanced by utilizing a spread spectrumgain produced through receiving despreading processing, thereby realizing aims of label target detection and information extraction. The method disclosed by the invention has the advantages that the radar hardware upgrade is unnecessary, the system performance is stable, and the interference resistance is strong.

Description

technical field [0001] The invention belongs to the technical field of radar and wireless communication, and relates to a method for realizing the integrated function of vehicle anti-collision radar detection and communication based on backscatter communication. Background technique [0002] Automotive collision avoidance radar is an indispensable sensor for autonomous vehicles with its object detection function. With the development of vehicle-road coordination technology, adding the label recognition function of roadside traffic signs to forward collision avoidance radar through backscatter communication technology will have important application value. The tag recognition function can not only be used for traffic sign recognition, but also can realize simple inter-vehicle communication by installing tags on the car, such as turning or braking notification, which will help improve the driving safety of the car. Backscatter communication is an emerging wireless communicati...

Claims

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Application Information

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IPC IPC(8): G01S13/93H04B1/707H04L27/20
CPCG01S13/931H04B1/707H04L27/20
Inventor 夏伟杰黄壮余思伟
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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