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Gesture recognition method based on MIMO millimeter-wave radar

A millimeter-wave radar, gesture recognition technology, applied in the reflection/re-radiation of radio waves, radio wave measurement systems, input/output processes of data processing, etc., can solve the problem of low detection accuracy, limited types of gesture recognition, cost Advanced problems, to achieve the effect of reducing the cost of receiving antenna signal processing, improving accuracy and robustness, and low cost

Active Publication Date: 2020-09-11
SICHUAN CHANGHONG ELECTRIC CO LTD
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to propose a gesture recognition method based on MIMO millimeter-wave radar to solve the problems of low detection accuracy, limited types of gesture recognition and high cost in traditional gesture recognition schemes

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  • Gesture recognition method based on MIMO millimeter-wave radar

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Embodiment

[0032] The gesture recognition algorithm process based on MIMO millimeter-wave radar in this embodiment is as follows figure 1 shown, which includes:

[0033] 1. The electromagnetic wave signal is transmitted by the millimeter-wave radar in the space to be measured, and the reflected signal in the space to be measured is received by the millimeter-wave radar.

[0034] 2. After ADC sampling the signal reflected from the space to be measured, perform the following operations:

[0035] 21) Perform Fourier transform on the collected signal, perform antenna signal compensation, and form a data cube;

[0036] 22) generating an azimuth direction vector according to the MIMO antenna array;

[0037] 23) Using the data of the virtual antenna array of distance and azimuth combined with the direction vector to perform AOA beamforming;

[0038] 24) Perform CFAR detection on the heatMap after beamforming to obtain the distance and azimuth of the target point cloud;

[0039] 3. For the o...

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Abstract

The invention relates to a radar signal processing technology, discloses a gesture recognition method based on an MIMO millimeter wave radar, and solves the problems of low detection accuracy, limitedgesture recognition types and high cost in a traditional gesture recognition scheme. According to the invention, the MIMO millimeter wave radar is used for transmitting and receiving electromagneticwaves, after distance dimension Fourier transform is carried out on received sampling signals, primary AOA beam forming is adopted according to virtual array data of a distance prediction angle, constant false alarm rate detection is carried out on the formed signals to obtain distance azimuth angle and other information, a distance dimension signal corresponding to a target obtained in the constant false alarm rate detection is extracted according to a HeapMap signal generated by first beamforming, second two-dimensional AOA beamforming is performed, parameters such as a pitch angle, a Doppler speed and a signal-to-noise ratio are solved, and according to the obtained parameters, the position, the azimuth angle and the pitch angle are analyzed and accumulated in a multi-frame mode and compared with preset feature parameters of related gestures, and gesture recognition results are obtained and output.

Description

technical field [0001] The invention relates to radar signal processing technology, in particular to a gesture recognition method based on MIMO millimeter wave radar. Background technique [0002] The existing gesture recognition methods are mainly realized by single optical lens, optical lens combined with infrared, TOF and other technologies. Among them, the detection time of a single optical lens is long, and the success rate of processing and detection of continuous high-definition images for a long time is low. At the same time, a processor with very strong computing power is required, and the cost for embedded applications is too high; optical lenses combined with TOF, infrared, etc. Technology has the problems of high cost and high complexity of system integration. [0003] In recent years, the on-chip technology of millimeter-wave radar has gradually matured, including the high integration of radar radio frequency, signal processing unit, MCU unit, and the realizati...

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Application Information

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IPC IPC(8): G01S13/88G06F3/01
CPCG01S13/88G06F3/017
Inventor 冯冬阳刘传银周杨崔雄文李剑鹏刘贤洪万潇
Owner SICHUAN CHANGHONG ELECTRIC CO LTD
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