Harmonic radar specific nonlinear target identification method and system

By using spectral gap analysis and dual-frequency coherent excitation fields, combined with high-order mixing decoupling and phase difference processing, the problem of nonlinear target recognition in complex electromagnetic environments by harmonic radar is solved, achieving efficient and accurate identification and positioning of specific nonlinear targets.

CN122085243AActive Publication Date: 2026-05-26LUOYANG INST OF SCI & TECH +1
View PDF 11 Cites 2 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
LUOYANG INST OF SCI & TECH
Filing Date
2026-04-23
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Existing harmonic radars struggle to effectively excite targets to produce stable nonlinear mixing responses in complex electromagnetic environments, resulting in insufficient accuracy in extracting and analyzing scattered signals, low accuracy and reliability in target identification, and time-consuming signal processing, making it difficult to achieve rapid identification and positioning.

Method used

By performing spectral gap analysis on the background electromagnetic characteristic parameters within the detection area, a dual-frequency coherent excitation field is constructed to excite potential nonlinear targets to generate nonlinear mixing and scattering signals. Through high-order mixing decoupling and phase difference processing, the high-order intermodulation components of the targets are accurately extracted, and the identification and spatial positioning calculations are completed by combining phase characteristics.

Benefits of technology

It improves the accuracy of target feature component extraction and recognition, optimizes the signal processing flow, enhances the recognition efficiency and reliability of harmonic radar for specific nonlinear targets, and achieves fast and accurate target recognition and positioning.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN122085243A_ABST
    Figure CN122085243A_ABST
Patent Text Reader

Abstract

This invention relates to the field of radar detection technology, specifically to a method and system for identifying specific nonlinear targets using harmonic radar. The method includes: analyzing the spectral gaps of background electromagnetic characteristic parameters in the detection area to obtain the initial center frequency of fundamental frequency transmission; generating a first fundamental frequency detection pulse and a second fundamental frequency detection pulse based on the initial center frequency of fundamental frequency transmission and radiating them to the detection area to construct a dual-frequency coherent excitation field; using the dual-frequency coherent excitation field to excite semiconductor junctions in potential nonlinear targets within the detection area to generate nonlinear mixing responses to obtain nonlinear mixing and scattering signals; performing high-order mixing and decoupling on the nonlinear mixing and scattering signals to obtain a first high-order intermodulation component and a second high-order intermodulation component; identifying characteristic components through phase difference processing; performing spatial positioning calculations on the identified characteristic components to obtain the three-dimensional spatial coordinates of the target and generate identification results. This invention can improve the efficiency of identifying specific nonlinear targets using harmonic radar.
Need to check novelty before this filing date? Find Prior Art