Quadrature-phase modulation-based MIMO radar three-dimensional imaging method

Abstract

The invention discloses a three-dimensional imaging method for MIMO radar based on quadrature phase modulation. Firstly, according to the number of transmitting array elements, a quadrature phase coding sequence with a corresponding number of groups is constructed; and then the received echo signals are correlated and filtered to realize different Separation of the echo signal corresponding to the transmitting array element; then divide the entire 3D imaging area, and traverse each pixel in the imaging area in turn to obtain the amplitude value corresponding to the time delay interval of all the transmitting and receiving array elements corresponding to the pixel point; finally, the entire 3D imaging area The coordinate information of the pixel points in the imaging space and the obtained amplitude value can form a three-dimensional matrix, and the three-dimensional space target information can be obtained by drawing the three-dimensional matrix according to the actual size ratio of the imaging area. The invention can realize the three-dimensional target imaging of the ground penetrating radar for simultaneous transmission and simultaneous reception of three-dimensional target information.

Description

technical field [0001] The invention relates to the technical field of ground-penetrating radar imaging, in particular to a quadrature phase modulation-based MIMO radar three-dimensional imaging method. Background technique [0002] Ground-penetrating radar is a radar system that uses electromagnetic waves to obtain information about unknown targets in the shallow surface of the ground. Since the high-resolution 3D imaging algorithm can be used to obtain information such as the size and position of hidden targets on different surfaces in 3D space, it is widely used in combating terrorism, medical diagnosis, disaster rescue, and security defense. [0003] MIMO radar is a multi-input and multiple-output radar. According to the arrangement of multiple transmitting antennas and receiving antennas, and the transmitting signals are orthogonal to each other, different array elements of the receiving antenna perform different matching filtering according to the scattered echoes of t...

AI Technical Summary

Problems solved by technology

[0004] What the present invention aims to solve is the problem that the existing 3D imaging algorithm is difficult to directly process echo signals sent and received by multiple parties. It provides a MIMO radar 3D imaging method based on quadrature phase modulation, which can realize simultaneous transmission and simultaneous reception to obtain 3D target information. Three-dimensional target imaging of ground penetrating radar

Images