Method and device for estimating third-order motion parameters of a target based on high-order phase fusion

By constructing a third-order polynomial phase model and performing high-order phase fusion estimation, the problem of target energy dispersion in complex traffic scenarios of vehicle-mounted millimeter-wave radar is solved, and accurate estimation of third-order motion parameters is achieved, improving detection robustness and accuracy, while reducing computational complexity and storage overhead.

CN121918096BActive Publication Date: 2026-06-16SHANGHAI AUXILIARY IMAGING TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHANGHAI AUXILIARY IMAGING TECHNOLOGY CO LTD
Filing Date
2026-03-27
Publication Date
2026-06-16

AI Technical Summary

Technical Problem

Existing vehicle-mounted millimeter-wave radars struggle to accurately estimate third-order motion parameters in complex traffic scenarios, leading to target energy dispersion, reduced spectral peaks, enhanced sidelobes, and decreased signal-to-noise ratio, thus affecting detection reliability and the accuracy of subsequent parameter estimation.

Method used

A high-order phase fusion-based method is adopted to construct a third-order polynomial phase model and perform high-order phase fusion estimation. The estimated values ​​of the third-order motion parameters are obtained by multi-order delay product and multi-delay weighted fusion. After third-order phase compensation, the estimated values ​​of the second-order motion parameters are obtained. Finally, the model is converted into a single-frequency slow-time complex sequence for target motion parameter estimation.

Benefits of technology

Without relying on dense grid search, it significantly improves the robustness and accuracy of maneuvering target detection, reduces computational complexity and storage overhead, and achieves a balance between real-time performance and computational cost.

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Abstract

The application provides a target third-order motion parameter estimation method and device based on high-order phase fusion, constructs a third-order polynomial phase model based on a radar echo signal, performs high-order phase fusion estimation, obtains an estimated value of the third-order motion parameter, performs third-order phase compensation based on the estimated value of the third-order motion parameter, obtains an estimated value of a second-order motion parameter, performs phase compensation on a slow-time complex sequence based on the estimated value of the third-order motion parameter and the estimated value of the second-order motion parameter, obtains a compensation sequence, converts the compensation sequence into a single-frequency slow-time complex sequence, and estimates the motion parameter of a target to be measured based on the single-frequency slow-time complex sequence. Through step-by-step compensation of the third-order and second-order phase terms, the coherent focusing of target energy can be realized without relying on dense grid search, so as to improve the robustness and precision of the detection of a mobile target, and meanwhile, the requirements of a vehicle-mounted system for real-time performance and the cost of computing power are considered.
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Citation Information

Patent Citations

  • Method and device for estimating non-stationary multi-target motion parameters

    CN116049634A

  • Maneuvering target detection parameter estimation method and device based on non-uniform sampling technology

    CN119044946A