一种机动平台双基地SAR运动目标成像与定位参数估计方法及系统

By employing a slow-time cubic polynomial slant range model and a multi-component QFM signal parameter estimation method optimized by a genetic algorithm on a mobile platform, the failure problem of imaging and positioning moving targets in bistatic SAR was solved, achieving efficient imaging and positioning of mobile targets and expanding the application scope of bistatic SAR systems.

CN120871136BActive Publication Date: 2026-07-17CHENGDU HUIRONG GUOKE MICROSYSTEM TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHENGDU HUIRONG GUOKE MICROSYSTEM TECH CO LTD
Filing Date
2025-08-19
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing technologies fail in imaging and locating moving targets using bistatic SAR on mobile platforms. They cannot effectively handle unknown acceleration of the target motion and range migration and azimuth phase modulation caused by non-cooperative motion, resulting in decreased imaging and locating accuracy.

Method used

An echo model is established using a slow-time cubic polynomial slant range model. By employing a multi-component QFM signal parameter estimation method optimized by range motion correction and genetic algorithm, combined with the extended range Doppler positioning equations, imaging and positioning parameter estimation of maneuvering targets are achieved.

Benefits of technology

It achieves efficient imaging and positioning of moving targets on mobile platforms, is suitable for terminal guidance applications in complex environments, and improves the reconnaissance capabilities and application range of bistatic SAR systems.

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Abstract

本发明涉及分布式合成孔径雷达（SAR）成像探测和集群制导技术领域，具体而言，涉及一种机动平台双基地SAR运动目标成像与定位参数估计方法及系统，通过本发明所提供的方法，采用距离频率反转变换实现运动目标距离徙动校正，方位上采用遗传算法优化加速的多分量QFM信号参数估计方法，最后基于估计的各阶多普勒参数，采用联合孔径方法，实现对具有加速度的机动目标进行状态参数估计，避免了现有技术中失效的情况。该方法实现了机动平台双基地SAR对机动目标的成像和定位，拓展了当前双基地SAR的应用范围，所提方法主要涉及点乘和快速傅里叶变换（FFT），运算效率高，因此适合对集群系统对运动目标进行末制导应用的场景。
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Citation Information

Patent Citations

  • Method and apparatus for space-variance correction imaging of bistatic SAR, device and storage medium

    US20210349205A1

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