Anti-interference method for millimeter-wave anti-collision radar

An anti-collision radar and millimeter wave technology, applied in radio wave measurement systems, instruments, etc., can solve problems such as radar target misjudgment, achieve the effect of reducing false alarms, easy to implement, and small amount of calculation

Inactive Publication Date: 2019-06-07
CHENGDU SEEKCON MICROWAVE COMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a millimeter-wave anti-collision radar anti-jamming method, which solves the problem of target misjudgment caused by mutual interference between radars

Method used

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  • Anti-interference method for millimeter-wave anti-collision radar
  • Anti-interference method for millimeter-wave anti-collision radar
  • Anti-interference method for millimeter-wave anti-collision radar

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Embodiment

[0048] like figure 1 As shown, a method for anti-jamming of millimeter-wave anti-collision radar, its realization includes the following steps:

[0049] (S1) Generate a group of pseudo-random bi-phase codes according to the radar transmission signal, and perform bi-phase encoding on the phase of each period, wherein, perform bi-phase encoding on the phase of each period, specifically for each of them Chirp cycle 0 / π modulation;

[0050] (S2) Demodulate the radar received signal by using the emission modulation rule, and the specific steps are as follows:

[0051] (a1) After the radar transmission signal is modulated by a pseudo-random bi-phase code, a radar chirp echo signal with a phase consistent with the local oscillator signal in the radar receiver and an interference signal with an inconsistent phase are obtained;

[0052] (a2) carry out the phase-consistent zero-IF frequency conversion between the radar chirp echo signal and the local oscillator signal in the radar re...

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Abstract

The invention provides an anti-interference method for a millimeter-wave anti-collision radar. The anti-interference method comprises: S1, generating a set of pseudo-random two-phase codes according to a radar transmission signal and carrying out two-phase encoding on the phases of all periods; S2, demodulating a radar receiving signal by using a transmitting modulation rule; S3, carrying out two-dimensional FFT processing on the demodulated result; and S4, carrying out CFAR detection processing according to the two-dimensional FFT processing result, thereby filtering an interference signal. According to the invention, a problem of the wrong target determination caused by the mutual interference between radars is solved; and the practicability and accuracy of the millimeter-wave anti-collision radar in a complex environment are improved. The less system resources are occupied; the method is flexible and is easy to implement; and the support is provided for the follow-up system upgrading and application extension. Therefore, the method has the great practical value and promotion value.

Description

technical field [0001] The invention belongs to the technical field of radar signal processing, and in particular relates to an anti-jamming method for a millimeter-wave anti-collision radar. Background technique [0002] Automated driving technology is the development trend of automobile technology in the 21st century. It is estimated that 25% of road vehicles will be automatically driven by 2030. Automated driving technology is composed of artificial intelligence, visual computing, radar, monitoring devices, GPS and other system technologies. The motor vehicle can be operated automatically and safely without any active human operation, among which the most important thing is the realization of the active safety collision avoidance function. In the evolution process of autonomous driving vehicle technology, the first industrialization is the vehicle active safety collision avoidance warning and braking. Currently, various assisted driving and unmanned driving solutions basi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/02
Inventor 何大为杨滔罗锐孙科徐飞张冰高建军
Owner CHENGDU SEEKCON MICROWAVE COMM
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