A Method for Electromagnetic Spectrum Interference Feature Extraction Based on Radio Frequency I / Q Signal Perturbation

By analyzing the joint distribution characteristics of I/Q signals and calculating the fluctuation characteristic parameters, the sensitivity and accuracy problems of electromagnetic spectrum interference detection in the prior art are solved, and sensitive interference detection and intensity determination are realized in complex environments.

CN122132798APending Publication Date: 2026-06-02HAINAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HAINAN UNIV
Filing Date
2026-01-26
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Existing electromagnetic spectrum interference detection methods suffer from decreased detection rate, high false alarm rate and missed detection rate in low signal-to-noise ratio environments, and are sensitive to nonlinear interference and frequency shift, making it difficult to achieve efficient and accurate interference detection.

Method used

By acquiring I/Q signals from the monitoring frequency band, analyzing the joint distribution characteristics of the I and Q signals, calculating fluctuation characteristic parameters, including orthogonality measurement and amplitude balance parameters, and determining the existence and intensity level of interference.

Benefits of technology

It achieves sensitive and accurate interference detection in complex electromagnetic environments, is suitable for resource-constrained terminal devices, has high real-time performance and stability, and can distinguish interference intensity levels.

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Abstract

This invention provides a method for extracting electromagnetic spectrum interference features based on radio frequency I / Q signal disturbances. The method includes the following steps: S101, acquiring I / Q signals in the monitoring frequency band and processing the acquired I / Q signals to extract the I-channel and Q-channel signals; S102, analyzing the joint distribution characteristics of the I / Q signals based on the I-channel and Q-channel signals; S103, calculating the fluctuation characteristic parameters of the I / Q signals based on the joint distribution characteristics of the I / Q signals, and determining whether interference exists in the I / Q signals based on the fluctuation characteristic parameters; S104, if there is no interference in the I / Q signals, outputting "no interference"; S105, if there is interference in the I / Q signals, determining the interference intensity level of the interference in the I / Q signals based on the fluctuation characteristic parameters, and outputting the final determination result of the interference intensity level. This invention achieves universal and sensitive interference detection by monitoring abnormal changes in the statistical characteristics of the I / Q signals themselves, effectively distinguishing the degree of interference in the I / Q signals and maintaining high detection accuracy.
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