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Range ambiguity restraining method and device and computer readable storage medium

A technology of range ambiguity and polarization, which is applied in the field of communication, can solve problems such as range ambiguity in full-polarization SAR systems, and achieve the effect of range ambiguity energy suppression

Inactive Publication Date: 2019-06-14
INST OF ELECTRONICS CHINESE ACAD OF SCI
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Problems solved by technology

[0003] Full polarization (quadrature polarimetric, quad-pol) synthetic aperture radar (Synthetic Aperture Radar, SAR) is the trend of SAR research and development. Compared with single polarization SAR, full polarization SAR can detect more abundant ground objects. However, the key problem faced by the fully polarimetric SAR system is: the cross-polarimetric (cross-pol) channel is interfered by the strong co-polarimetric (co-pol) range ambiguity signal, making The range ambiguity problem of full polarization SAR system is quite serious

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  • Range ambiguity restraining method and device and computer readable storage medium
  • Range ambiguity restraining method and device and computer readable storage medium
  • Range ambiguity restraining method and device and computer readable storage medium

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Embodiment Construction

[0053] The present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0054] figure 1 It is a schematic flow chart of the method for suppressing distance ambiguity in the embodiment of the present application, such as figure 1 As shown, the method includes the following steps:

[0055] Step 101: Determine the pulse timing relationship of the transmitted signal;

[0056] In practical application, in the hybrid polarization SAR system, based on the pulse repetition frequency of the transmitted signal, the pulse timing relationship of the transmitted signal can be determined.

[0057] In an embodiment, the determining the pulse timing relationship of the transmitted signal includes: determining the pulse timing relationship of the transmitted signal according to the pulse repetition frequency of the transmitted signal, wherein the pulse timing relationship PRI=1 / PRF , PRF is the pulse repetition frequ...

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Abstract

Embodiments of the invention disclose a range ambiguity restraining method. The method comprises the steps of: determining a pulse time sequence relationship of emission signals; determining an orthogonal nonlinear frequency modulated signal; modulating the emission signals by utilizing the orthogonal nonlinear frequency modulated signal; emitting the modulated emission signals according to the pulse time sequence relationship and determining echo data of the modulated emission signals; and generating an image according to a polarization scattering matrix of the echo data of the modulated emission signals. The embodiments of the invention furthermore disclose a range ambiguity restraining device and a computer readable storage medium.

Description

technical field [0001] The embodiments of the present application relate to the field of communication technologies, and relate to but are not limited to a method, device, and computer-readable storage medium for suppressing distance ambiguity. Background technique [0002] The antenna pattern of the radar pitch direction (range direction) is not an ideal beam, and the actual width covered by the antenna pitch direction beam is wider than the surveying zone, so the range direction also has echo energy returning outside the surveying zone area illuminated by the main lobe, and these external echoes The wave is mixed with the useful echo in the surveying zone, and the radar image quality will be degraded after signal processing. This part of energy is called Range Ambiguity. [0003] Full polarization (quadrature polarimetric, quad-pol) synthetic aperture radar (Synthetic Aperture Radar, SAR) is the trend of SAR research and development. Compared with single polarization SAR, ...

Claims

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Application Information

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IPC IPC(8): G01S13/90G01S7/41
CPCG01S13/9076G01S13/282G01S13/106G01S7/026G06N7/08G01S7/025G01S7/2813
Inventor 赵鹏飞邓云凯王宇刘大成
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI
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