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Radio frequency interference detection method and device and radio frequency interference suppression method and device

A radio frequency interference and detection method technology, applied in radio wave measurement systems, instruments, etc., can solve problems such as difficulty in setting thresholds for accurate detection of interference locations by notch methods, computational complexity limitations of parametric methods, adverse effects on SAR imaging results, etc.

Active Publication Date: 2020-11-10
INNER MONGOLIA UNIV OF TECH
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Problems solved by technology

Zhou Feng et al. proposed a complex empirical model decomposition method to decompose radio frequency interference into essential mode functions. However, solving the optimization model at each distance line requires a complex process, so the parameterization method is limited by the computational complexity.
The non-parametric method can achieve RFI suppression without any prior knowledge or parametric model, and the frequency-domain notch method can achieve RFI suppression simply and quickly, but it will also adversely affect the SAR imaging results
Especially when the RFI signal is too small, it is difficult for the notch method to set a suitable threshold to accurately detect the interference location

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  • Radio frequency interference detection method and device and radio frequency interference suppression method and device
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  • Radio frequency interference detection method and device and radio frequency interference suppression method and device

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[0062]Various exemplary embodiments, features, and aspects of the present disclosure will be described in detail below with reference to the accompanying drawings. The same reference numbers in the figures indicate functionally identical or similar elements. While various aspects of the embodiments are shown in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

[0063] The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as superior or better than other embodiments.

[0064] The term "and / or" in this article is just an association relationship describing associated objects, which means that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist simultaneously, and there exists alone B these three situations. In addition, the term "at least one" herein means...

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Abstract

The invention relates to a radio frequency interference detection method and device, a radio frequency interference suppression method and device. The detection method comprises the steps of acquiringa first frequency spectrum of an azimuth time domain distance frequency domain corresponding to an SAR echo signal; smoothing the first frequency spectrum to obtain a second frequency spectrum; filtering the out-of-band frequency spectrum of the second frequency spectrum to obtain a third frequency spectrum; and performing radio frequency interference detection on the third frequency spectrum toobtain radio frequency interference information. According to the embodiment of the invention, an interference frequency band can be accurately detected, interference is filtered, missing data can bereconstructed, and the effect of suppressing radio frequency interference is ensured.

Description

technical field [0001] The present disclosure relates to the technical field of radar signal processing, and in particular to a radio frequency interference detection method and device, and a radio frequency interference suppression method and device. Background technique [0002] SAR (Synthetic Aperture Radar) technology is an active means of aerospace and aviation remote sensing. Microwave imaging technology has the characteristics of all-day and all-weather work. It is widely used in military and civilian fields. It is used for earth change detection and environmental monitoring. , Ocean detection, road detection, earthquake relief and other remote sensing surveying and mapping work has brought great help. Faced with the increasingly complex electromagnetic environment, there are a large number of radio frequency interference signals from terrestrial broadcasting and television systems and communication systems within the working frequency band of low-band SAR systems. C...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/41
CPCG01S7/414
Inventor 徐伟邢伟达黄平平谭维贤乞耀龙李亚超
Owner INNER MONGOLIA UNIV OF TECH
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