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Millimeter-wave radar target speed ambiguity resolution method

A millimeter wave radar, target speed technology, applied in radio wave measurement systems, radio wave reflection/re-radiation, utilization of re-radiation and other directions, can solve the problems of accurate decoupling trouble, phase difference, limited speed range, etc. Data retrieval efficiency and the effect of reducing data search query time

Inactive Publication Date: 2021-02-09
SHANGHAI BAOLONG AUTOMOTIVE CORP
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Problems solved by technology

The disadvantage of this method is that the phase difference generated by space and velocity will be introduced at the same time, the accurate decoupling is more troublesome, and the expanded velocity range after velocity defuzzification is limited

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  • Millimeter-wave radar target speed ambiguity resolution method
  • Millimeter-wave radar target speed ambiguity resolution method

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Embodiment Construction

[0047] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0048] In the following description, many specific details are set forth in order to fully understand the present invention, but the present invention can also be implemented in other ways than those described here, so the present invention is not limited by the specific embodiments disclosed below.

[0049]As indicated in this application and claims, the terms "a", "an", "an" and / or "the" do not refer to the singular and may include the plural unless the context clearly indicates an exception. Generally speaking, the terms "comprising" and "comprising" only suggest the inclusion of clearly identified steps and elements, and these steps and elements do not constitute an exclusive list, and the method or device may also contain other ste...

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Abstract

The invention relates to a millimeter-wave radar target speed ambiguity resolution method. The millimeter-wave radar target speed ambiguity resolution method comprises the steps of: S1, selecting a transmitting antenna, and adding a same linear frequency modulation signal with a time delay a before continuous linear frequency modulation signals are transmitted; S2, performing 2DFFT processing on the received signal according to the signal of the transmitting antenna which is received by the receiving antenna and is reflected by the target; S3, performing target detection according to a processing result of the 2DFFT and calculating a first fuzzy speed estimation value; and S4, calculating to obtain a second fuzzy speed estimation value according to the linear frequency modulation signal and the 2DFFT processing result of the linear frequency modulation signal with the time delay a. Through the scheme provided by the invention, the real speed of the target can be obtained.

Description

technical field [0001] The invention relates to a target speed estimation technology in vehicle-mounted millimeter-wave radar detection, and belongs to the technical field of radar signal processing. Specifically, it is a target velocity deambiguation method suitable for vehicle-mounted millimeter-wave broadband radars. Background technique [0002] Velocity ambiguity means that when the pulse Doppler radar works at low and medium repetition frequency (PRF), the Doppler response of the observed moving target exceeds a PRF range, resulting in ambiguity. The target velocity analyzed by ambiguous Doppler is incorrect. Therefore, it is difficult to distinguish the phenomenon of the target's true speed. [0003] At present, there are many speed defuzzification methods commonly used in the chirp frequency modulated continuous wave (FMCW) modulation mode. Among them, the multi-frame speed ambiguity method is to solve the problem accurately by transmitting different waveforms in t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/931G01S13/58
CPCG01S13/58G01S13/931
Inventor 石文峰李威吴雨欣
Owner SHANGHAI BAOLONG AUTOMOTIVE CORP
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