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Weak target detection method based on automobile millimeter wave radar, tracking method and system

A millimeter wave radar, weak target detection technology, applied in radio wave measurement systems, instruments, etc., can solve problems such as false alarms, and achieve the effect of eliminating the signal-to-noise ratio, reducing the number of false targets, and reducing the probability of false alarms.

Active Publication Date: 2020-01-03
成都纳雷科技有限公司
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Problems solved by technology

[0009] The present invention provides a weak target detection method, tracking method and system based on automotive millimeter-wave radar, which is used to solve the problem that a large number of false alarms are easily generated when the existing weak target detection method based on automotive millimeter-wave radar detects weak targets technical problem

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  • Weak target detection method based on automobile millimeter wave radar, tracking method and system
  • Weak target detection method based on automobile millimeter wave radar, tracking method and system

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Embodiment 1

[0060] like Figure 7 As shown, the present invention discloses a weak target detection method based on automotive millimeter-wave radar, comprising the following steps:

[0061] Obtain the chirp continuous wave signals of multiple coherent processing cycles emitted by the radar and the echo signals of multiple coherent processing cycles generated by reflection on the target to be distinguished when the chirp continuous wave signals emitted by the radar are detecting targets;

[0062] Estimate the target angle corresponding to the echo signal in each period according to the chirp continuous wave signal in each period and the corresponding echo signal in each period;

[0063] Comparing whether the target angles of the echo signals in multiple coherent processing cycles are consistent, if the target angles of the echo signals in multiple coherent processing cycles are consistent, it is determined that the target angle corresponding to the echo signal is to be resolved The targe...

Embodiment 2

[0067] Embodiment 2 is an extended embodiment of Embodiment 1, and its difference from Embodiment 1 lies in the acquisition of the two-dimensional angle-Doppler matrix of the echo signal, the target angle estimation based on sparse recovery, how to More comparative DOA estimates were refined by stitching multiple CPI data.

[0068] (1) Acquisition of the two-dimensional angle-Doppler matrix image of the echo signal

[0069] Each element of the automotive millimeter-wave radar emits a linear frequency modulation (LFM, Linear Frequency Modulation) continuous wave signal with multiple coherent processing cycles, samples the pulses in each cycle of the linear frequency modulation continuous wave signal, and performs range-dimensional Fourier transform Transform (FFT, Fast Fourier Transform) to obtain the distance dimension processing result. Corresponding to a certain distance unit, the velocity dimension FFT processing is performed on the echo signals of multiple pulses, that is...

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Abstract

The invention discloses a weak target detection method based on automobile millimeter wave radar, a tracking method and a system. The weak target detection method based on automobile millimeter wave radar comprises the following steps of estimating the corresponding target angle of an echo signal in each period according to a corrected linear frequency modulation continuous wave signal in each period and the corresponding echo signal in each period; comparing whether the target angles of the echo signal in a plurality of coherent processing periods are consistent or not; if the target angles of the echo signal in the plurality of coherent processing periods are consistent, judging that a target to be resolved corresponding to the echo signal is a real target; and if the target angles of the echo signal in the plurality of coherent processing periods are not consistent, judging that the target to be resolved corresponding to the echo signal is a false target. Compared with the prior art, the weak target detection method based on automobile millimeter wave radar belongs to a low-signal-to-noise ratio target detection technology with the advantages that the goal of detecting a weak target in a long distance can be achieved; meanwhile, the number of false targets is greatly reduced; and the low-false-alarm-probability constraint is finally realized.

Description

technical field [0001] The invention relates to the field of target detection of automobile millimeter-wave radar, in particular to a weak target detection method, tracking method and system based on automobile millimeter-wave radar. Background technique [0002] The automotive millimeter-wave radar sensor can meet the requirements of the vehicle's adaptability to the all-weather climate. For automotive millimeter-wave radar applications, the actual operating road environment is complex, and the radar cross-sectional area (RCS, RadarCross Section) of various targets is quite different, and the radar needs to detect potential targets in time and estimate the parameters of the target and track. [0003] The existing radar detection target method mainly includes the following steps: [0004] The automotive millimeter-wave radar transmits multiple cycles of linear frequency modulation (LFM, Linear Frequency Modulation) signals, samples the pulses in each cycle of the linear fr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/41
CPCG01S7/418Y02T10/40
Inventor 张伟王平谭梦瑶何宁宇李朝海何子述
Owner 成都纳雷科技有限公司
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