Method, apparatus, device, and storage medium for estimating and suppressing interference signals

By estimating and suppressing interference signals in a distributed synthetic aperture radar system, the problems of frequency deviation and phase error were solved, ensuring high precision of the synchronization signal, improving radar image resolution and signal-to-noise ratio, and achieving high-precision mapping results.

CN116879843BActive Publication Date: 2026-07-21AEROSPACE INFORMATION RES INST CAS
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
AEROSPACE INFORMATION RES INST CAS
Filing Date
2023-06-16
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

In distributed synthetic aperture radar systems, frequency deviations and phase errors caused by the use of different reference clock sources by the transmitter and receiver reduce radar image resolution and signal-to-noise ratio. Furthermore, the prediction of existing interference signals is not accurate enough, affecting the suppression effect of synchronization signals and thus impacting system performance.

Method used

By estimating the frequency, amplitude, and initial phase of the interference signal, the basis functions are used to accurately estimate and suppress the interference signal, ensuring that the synchronization signal after interference removal retains its true phase characteristics and improving the measurement accuracy of the distributed SAR system.

Benefits of technology

It achieves high-precision phase synchronization and high-precision measurement of synchronization signals, improving the mapping accuracy of distributed SAR systems.

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Abstract

The application provides an interference signal estimation method and an interference signal suppression method, device, computer readable storage medium and computer equipment. The interference signal estimation method comprises: obtaining at least one estimated interference frequency in a first signal containing an interference signal; determining a second signal corresponding to the at least one estimated interference frequency from the first signal; for each estimated interference frequency, determining a basis function corresponding to the estimated interference frequency from a preset third signal; based on the second signal and the basis function corresponding to each estimated interference frequency, determining an estimated amplitude and an estimated initial phase corresponding to each estimated interference frequency; and based on the estimated amplitude, the estimated initial phase and the basis function corresponding to each estimated interference frequency, estimating the interference signal in the first signal to obtain an estimated interference signal.
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