Airborne SAR interference effect simulation method under high-energy microwave interference

A microwave interference and interference effect technology, applied in radio wave measurement systems, instruments, etc., can solve problems such as lack of signal-level simulation, and achieve the effects of improving echo simulation efficiency, complex simulation scenarios, and shortening simulation time

Active Publication Date: 2021-03-30
XIDIAN UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

However, the research on the signal level simulation of the high-energy microwave entering the overall process of SAR as an interference signal and the evaluation of its impact on imaging results is relatively lacking.

Method used

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  • Airborne SAR interference effect simulation method under high-energy microwave interference
  • Airborne SAR interference effect simulation method under high-energy microwave interference
  • Airborne SAR interference effect simulation method under high-energy microwave interference

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Embodiment Construction

[0031] Embodiments of the present invention will be described in detail below in conjunction with examples, but those skilled in the art will understand that the following examples are only used to illustrate the present invention, and should not be considered as limiting the scope of the present invention.

[0032] refer to figure 1 , the airborne SAR jamming effect simulation method under a kind of high-energy microwave jamming provided by the present invention, comprises the following steps:

[0033] Step 1. Establish a stop-and-go geometric model of the airborne SAR radar, and use the concentric circle algorithm to simulate the target echo signals of all concentric circles in the scene at a certain azimuth moment; that is, the expression including the target echo time delay, amplitude and phase information;

[0034] First, establish the stop-and-go geometric model of the airborne SAR radar:

[0035] Treat the radar as stationary during each pulse repetition period; set th...

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Abstract

The invention discloses an airborne SAR interference effect simulation method under high-energy microwave interference, and the method comprises the steps: building an airborne SAR radar travel-stop geometric model, carrying out the quick radio frequency echo simulation based on a concentric circle algorithm, and simulating a nonlinear suppression effect on a target echo signal when a high-energymicrowave enters a receiver through building a receiver channel model; and finally, performing imaging analysis by using a distance Doppler algorithm. The airborne SAR software simulation method is high in efficiency and low in cost. According to the invention, the high-energy microwave effect applied to a device-level hardware experiment is converted into the nonlinear suppression effect considered during signal-level software simulation to simulate the influence of high-energy microwaves on the final imaging result, the cost is low, and the flexibility is high.

Description

technical field [0001] The invention relates to the technical field of radar digital signal processing, in particular to an airborne SAR interference effect simulation method under high-energy microwave interference, which can be applied to evaluate the influence of high-energy microwave interference on airborne SAR imaging effects. Background technique [0002] Synthetic Aperture Radar (SAR) is an active microwave imaging radar, which generally transmits a large-bandwidth Linear Frequency Modulation (LFM) signal, and uses an imaging algorithm to process the signal into an image that can be understood by the human eye after receiving the echo. Synthetic aperture radar can image and locate targets all-weather, all-time, and long-distance, and has the advantages of two-dimensional high-resolution distance and azimuth. [0003] In modern electronic countermeasures, active high-power microwaves generated by electromagnetic radiation devices pose a serious threat to radar electro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/40G01S7/38
CPCG01S7/4052G01S7/38
Inventor 别博文全俊全英汇徐楷杰冯伟肖国尧王迪
Owner XIDIAN UNIV
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