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Human body recognition method based on multi-base radar micro-Doppler and convolutional neural network

A convolutional neural network and human body recognition technology, applied in the field of radar target recognition, can solve the problems of difficult to meet complex and diverse target recognition tasks, difficult to make full use of correlation, etc., so as to alleviate the difference of echo signals and improve the recognition accuracy. , good flexibility

Active Publication Date: 2018-11-23
TSINGHUA UNIV
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Problems solved by technology

However, the classic target recognition method has many shortcomings mentioned above, and it is difficult to meet complex and diverse target recognition tasks; the simple majority vote fusion is difficult to make full use of the correlation between the data of each node, and the fusion effect still has room for improvement

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  • Human body recognition method based on multi-base radar micro-Doppler and convolutional neural network
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  • Human body recognition method based on multi-base radar micro-Doppler and convolutional neural network

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Embodiment Construction

[0037] The human body recognition method based on multistatic radar micro-Doppler and convolutional neural network proposed by the present invention, its flow chart is as follows figure 1 shown, including the following steps:

[0038] (1) Acquisition of known types of human body time domain echo signals:

[0039] A multistatic radar is used to collect time-domain echo signals of a known type of human body. The multistatic radar includes three receiving nodes with different positions, and the three receiving nodes simultaneously collect three-way time-domain echo signals s of the human body. 1 (t),s 2 (t),s 3 (t), where t is the acquisition time; in one embodiment of the present invention, the multistatic radar used is a chirp radar with a carrier frequency of 2.4GHz, a bandwidth of 45MHz, and a pulse repetition frequency of 5kHz, such as figure 2 As shown, it includes three nodes N1, N2, N3 arranged in a straight line at equal distances, among which N1, N2, N3 are all rec...

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Abstract

The invention relates to a human body recognition method based on multi-base radar micro-Doppler and a convolutional neural network, and belongs to the technical field of radar target recognition. According to the method, the multi-base radar is used so that the echo signal difference caused by the change of view can be alleviated, the recognition robustness can be enhanced and the recognition accuracy can be enhanced. The convolutional neural network is applied to perform data processing without manual feature design so as to have certain universality and excellent recognition accuracy performance. According to the method, the transfer learning technology is used, the RGB optical image is utilized in the convolutional neural network to pre-train the weight and the three-channel multi-resolution time-frequency graph having the similar RGB optical image is used as the input of the convolutional neural network so that the pre-training weight dimension is matched, more information is provided in comparison with that of the single-resolution time-frequency graph. Great recognition accuracy can be obtained in multiple human body recognition tasks by the method.

Description

technical field [0001] The invention relates to a human body recognition method based on multistatic radar micro-Doppler and convolutional neural network, and belongs to the technical field of radar target recognition. Background technique [0002] Using radar to observe targets has the advantages of long-distance and all-weather all-weather. The radar micro-Doppler effect refers to the additional Doppler effect caused by the vibration and rotation of the target relative to the center of mass on the basis of the Doppler effect caused by the movement of the center of mass of the target. The micro-Doppler frequency shift of the target changes with time The law of change, that is, the micro-Doppler time-frequency map, can reflect the target's motion attitude and structural information, so it can be used as a feature of target recognition for application scenarios such as aircraft recognition, human posture recognition, and gesture recognition. Based on micro-Doppler features T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/90G01S7/41
CPCG01S7/417G01S13/90G01S13/9017G01S13/9047
Inventor 李刚陈兆希
Owner TSINGHUA UNIV
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