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Velocity ambiguity resolution method based on MIMO automotive radar

An automotive radar and defuzzification technology, which is applied in the direction of radio wave reflection/re-radiation, using re-radiation, measuring devices, etc., can solve the problem of not finding the speed, ambiguity, and affecting the correct synthesis of the receiving antenna aperture

Active Publication Date: 2018-09-28
WHST CO LTD
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Problems solved by technology

There are two main defects in TDM MIMO: First, the phase change caused by the Doppler frequency of the moving target in different transmitting antenna switching times will be coupled to each receiving antenna, affecting the correct synthesis of the receiving antenna aperture
At present, in the retrieved public related literature and patents, no method has been found to solve the speed ambiguity and improve the range of speed measurement

Method used

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  • Velocity ambiguity resolution method based on MIMO automotive radar
  • Velocity ambiguity resolution method based on MIMO automotive radar
  • Velocity ambiguity resolution method based on MIMO automotive radar

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Embodiment Construction

[0044] In order to deepen the understanding of the present invention, the present invention will be further described below in conjunction with examples, which are only used to explain the present invention and do not constitute a limitation to the protection scope of the present invention. Such as Figure 1-5 As shown, the present embodiment provides a speed defuzzification method based on MIMO automotive radar, and the steps of the method are as follows:

[0045] Step 1: The vehicle-mounted multiple-input multiple-output MIMO radar includes M transmit antennas and N receive antennas, the distance between two adjacent transmit antennas is D, and the distance between two adjacent receive antennas is d;

[0046] Step 2: In TDMMIMO, M transmit antennas start to transmit sequentially from number 1 until the end of a cycle after the number M transmits. The working time of each transmit antenna is T, and N receive antennas simultaneously receive the data transmitted by each transmi...

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Abstract

The invention provides a velocity ambiguity resolution method based on MIMO automotive radar. By adopting multichannel Doppler phase compensation, FFT processing is performed on multiple compensated channels, and an optimal channel method is selected according to certain mathematical criterion. The velocity ambiguity problem of TDM MIMO is solved, the range of velocity measurement is increased, the accuracy of angle measurement is guaranteed, and practical value of the technology in the automotive radar direction is greatly extended.

Description

technical field [0001] The invention relates to the application field of automotive radar, in particular to a speed defuzzification method based on MIMO automotive radar. Background technique [0002] In the active and safe driving technology of automobiles, millimeter-wave radar has gradually become an indispensable and important sensor due to its all-day and all-weather working characteristics. The weakness of mmWave radar relative to vision and laser detectors is its relatively low resolution. However, with the continuous advancement of technology in recent years, millimeter-wave radar has gradually developed in the direction of high-resolution imaging, high-precision maps and positioning. [0003] The vertical high resolution of the radar can be achieved by transmitting a signal with a large bandwidth, while the horizontal high resolution needs to increase the antenna aperture. Among them, multiple-input multiple-output (MIMO) is considered to be an important technolog...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/92G01S7/41
CPCG01S7/415G01S7/418G01S13/92
Inventor 秦屹郑远
Owner WHST CO LTD
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