Multi-polarization HRRP scattering center extraction method based on multi-vector ANM

Abstract

The invention discloses a multi-polarization HRRP scattering center extraction method based on multi-vector ANM. By adopting the scheme of the invention, the robust and highly-accurate scattering center extraction can be achieved. The scheme of the invention utilizes the characteristics that the scattering centers of each channel of a multi-polarization high resolution range profile (HRRP) have the same position and different maximum peak values, performs scattering center estimation by using a multi-vector atomic norm minimization model, obtains a polarization scattering matrix of scatteringpoints while accurately obtaining the position information, and provides more comprehensive information for target recognition. The scheme of the invention fully utilizes the common information between the multi-polarization channels, and effectively improves the estimation accuracy; and compared with the traditional P-MUSIC and P-ESPIRIT methods, the scheme of the invention can adapt to the situation of poor signal-to-noise ratios and has better robustness to noise.

Description

technical field [0001] The invention belongs to the technical field of radar target recognition, and relates to a radar multi-polarization high-resolution range profile (HRRP) target recognition method, in particular to a scattering center extraction method based on multi-vector (MMV) atomic norm minimization (ANM). Background technique [0002] Polarization is an important attribute of electromagnetic waves. Multi-polarization radar can provide more information for target recognition. Combining radar polarization information with high-resolution technology has become a promising research field in the field of radar target recognition. [0003] In the optical region, the radar target echo can be regarded as the vector sum of a large number of scattering center echoes with different intensities on the target surface. High-resolution range profile (HRRP) characterizes the distribution of scattering centers along the radar line of sight, reflects the structural characteristics ...

AI Technical Summary

Problems solved by technology

For example, PRONY, MUSIC, OMP methods, etc. The existing multi-polarization high-resolution range image scattering center extraction methods are mainly the expansion of the above methods in the case of multi-polarization, including P-MUSIC, P-ESPIRIT, group sparse methods, etc. The P-MUSIC and P-ESPIRIT methods are sensitive to the signal-to-noise ratio, and the group sparse method has a base mismatch problem, which will lead to inaccurate position estimation

In recent years, some scholars have proposed the atomic norm minimization method to extract the scattering center of single-polarization HRRP, and achieved good results, but there has been no literature on its application in the case of multi-polarization, and if each multi-polarization The channel data is used as the input data to solve by the single-polarization ANM method, the effect is not good, and the common information between the multi-polarization channels is not utilized

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