A low-angle fast target radar multipath effect compensation method based on timing characteristics

By employing a radar multipath effect compensation method based on time-series characteristics, and utilizing target motion models and wavelet transform techniques, the elevation multipath error is reconstructed and iteratively compensated. This solves the problem of multipath effect in low-angle, fast-target radar, improves angle measurement accuracy and trajectory accuracy, and is applicable to various environments.

CN121978642BActive Publication Date: 2026-07-24NANJING RES INST OF ELECTRONICS TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NANJING RES INST OF ELECTRONICS TECH
Filing Date
2026-04-08
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

Existing radar multipath effect compensation methods fail to effectively consider the continuity of target motion and are difficult to cover the multipath error compensation requirements of low-angle radar detection in various scenarios. In particular, under low elevation angle and fast target conditions, multipath effects lead to signal distortion and deterioration of angle measurement accuracy.

Method used

The method for compensating for multipath effects in low-angle fast target radar based on time-series characteristics is to acquire a three-dimensional measurement residual time-series sequence, perform continuous wavelet transform and Gaussian test to reconstruct the pitch multipath error term, and compensate by iteratively adjusting the weights. The motion state is estimated using the target motion model and weighted least squares method.

Benefits of technology

It effectively compensates for multipath errors of low-angle, high-speed targets, improves target trajectory accuracy, is suitable for upgrading and retrofitting old equipment, has strong adaptability, low cost, and is minimally affected by environmental changes.

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Abstract

The application belongs to the field of new generation information technology, and particularly relates to a low-angle fast target radar multipath effect compensation method based on time sequence characteristics. The application obtains a three-dimensional measurement residual time sequence, performs continuous wavelet transform on a pitch residual sequence in the sequence, reconstructs a pitch multipath error term, eliminates the pitch multipath error term in the pitch residual sequence, and obtains a compensated pitch residual sequence. Then, Gaussian test is performed on the compensated pitch residual sequence, a statistical quantity is calculated, and judgment is made according to the absolute difference between the adjacent two statistical quantities. If the iteration does not converge, the next iteration is started. If the iteration converges, the current motion state estimation value and the compensated pitch measurement sequence are output, and the compensation of the low-angle fast target radar multipath effect is realized. Through the application, the effective compensation of the low-angle fast target multipath error term can be realized. Neither front-end hardware modification is involved, nor good adaptability to the environment is required.
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