Radar target recognition method based on multi-azimuth pulse-E technology

Abstract

The invention discloses a radar target recognition method based on a multi-azimuth pulse-E technology. A radar target library is provided with M targets, echo data of each target in multiple azimuth angles is acquired through actual measurement or simulation, a radar target echo database is established, and the echo data in the database is used as a training sample; the echo data of each target on any azimuth angle in a first-step radar target library is acquired through actual measurement or simulation to be used as a test sample; the multi-azimuth pulse-E training algorithm and training sample are used for establishing multiple pulses E for each target in the radar target library; and the test sample is used for testing a recognition effect of the multi-azimuth pulse-E technology. Due to the adoption of the method, the recognition probability and the noise resistance of the pulse-E technology for the radar target can be improved.

Description

technical field [0001] The invention belongs to the technical field of radar target recognition, in particular to a radar target recognition method based on multi-directional E-pulse technology. Background technique [0002] Since the 1990s, the pole characteristics of radar targets have been widely used in short-pulse radar target recognition. The pole is the complex natural resonance frequency of the target, which is only determined by the characteristics of the target itself, such as shape, size, material, etc., and the target attitude and Radar polarization is irrelevant, so the use of pole features for target recognition can overcome the shortcomings of features such as scattering centers that vary with target attitude. The initial target recognition method based on pole features is to extract the poles of known targets in advance and build a database. After receiving the time-domain echo of the radar target to be identified, extract the poles from the echo and compare ...

AI Technical Summary

Problems solved by technology

The theoretical basis for this understanding is that the target pole has nothing to do with the orientation of the incident wave, but it ignores that the residue corresponding to the pole is related to the orientation. The residue represents the contribution of the corresponding pole to the back time of the echo. At some angles, some poles The corresponding residue may be very small, which means that the corresponding pole cannot be well excited. Using a pole extraction algorithm such as the matrix beam method, only the pole with a relatively large residue can be extracted, and the poles with a large residue in different orientations are not necessarily the same , which leads to the fact that the poles extracted from different orientations are not necessarily the same

In this case, if only the pole extracted from a certain angle is used to construct the E-pulse, the E-pulse may have no effect on echoes from other azimuths, which will eventually lead to a low recognition rate when the traditional E-pulse technology is actually used

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