A vehicle-mounted anti-collision radar demultiplexing target detection method

Abstract

The invention discloses a vehicle-mounted anti-collision radar split-wave target detection method, comprising: step 1, performing one-dimensional distance compression on L columns of receiving antennas obtained by MIMO antennas according to each cycle, and obtaining the one-dimensional distance of L columns of receiving antennas Image matrix X1; step 2, perform matching filtering on the one-dimensional range image matrix X1 according to each column in the direction of the azimuth, and obtain matrix X2; step 3, use the FOV of the receiving antennas in the L columns as the step of the antenna beam width to obtain several mutually different Overlapping steering angles, beamforming matrix X2 at each steering angle to get a new matrix Y for each steering angle θ ; Step 4, new matrix Y for each steering angle θ After calculating the modulus, do CFAR detection to obtain the target speed and distance information of each steering angle; gather all the targets in the direction of the steering angle and eliminate the targets with the same speed and distance, and then obtain the target angle information through AOA estimation. The method of the invention realizes simultaneous detection of long-distance targets under the condition that the FOV is required to be large enough.

Description

technical field [0001] The invention relates to the technical field of radar signal processing, in particular to a vehicle-mounted anti-collision radar split-wave target detection method. Background technique [0002] The 77GHZ millimeter-wave radar has high frequency, short wavelength, and high speed and distance measurement accuracy. In fields that require high precision (such as the field of automobile collision avoidance), the 77GHZ millimeter-wave radar can work around the clock without being affected by fog, dust, light, etc. Influences such as bad weather and environment have become the mainstream choice of the industry, so it is also a key research topic for automotive electronics manufacturers and major universities. [0003] The general millimeter-wave radar adopts the method of non-coherent accumulation, and its SNR is not enough to meet the simultaneous detection of long-distance targets under the condition that the FOV is required to be large enough. Contents ...

AI Technical Summary

Problems solved by technology

[0003] Generally, millimeter-wave radar adopts the method of non-coherent accumulation, and its SNR is not enough to meet the simultaneous detection of long-distance targets under the condition that the FOV is required to be large enough.

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