Shift-change double-base forward-looking synthetic aperture radar distance migration correction method

A range migration correction, synthetic aperture radar technology, applied in the field of radar, can solve the problem that cannot be used for shift-variable bi-base forward-looking synthetic aperture radar, etc.

Inactive Publication Date: 2015-12-16
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the conventional distance migration correction method in the prior art cannot be used for the shift-v

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  • Shift-change double-base forward-looking synthetic aperture radar distance migration correction method
  • Shift-change double-base forward-looking synthetic aperture radar distance migration correction method
  • Shift-change double-base forward-looking synthetic aperture radar distance migration correction method

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Embodiment Construction

[0060] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0061] In order to describe content of the present invention conveniently, at first the following terms are explained:

[0062] Term 1: Bistatic Forward-looking SAR (Bistatic Forward-looking SAR).

[0063] Bistatic forward-looking SAR refers to the SAR system in which the system transmitting station and receiving station are separated on different platforms, at least one of which is a moving platform, and the receiving station works in the forward-looking receiving mode, which is conceptually a bistatic radar .

[0064] Term 2: Shift-variable bistatic forward-looking SAR (TV-BFSAR).

[0065] The shift-variable bistatic forward-looking SAR is a kind of bistatic forward-looking SAR, and the relative positions of the two stations change with time.

[0066] Term 3: Doppler ambiguity number.

[0067] When the pulse repetition frequency is lower than the e...

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Abstract

The invention discloses a shift-change double-base forward-looking synthetic aperture radar distance migration correction method. Based on a shift-change double-base forward-looking synthetic aperture radar distance migration rule, variable substitution is introduced for realizing azimuth-variant distance migration correction; and combined with iteration assessment and comparison of the correction quality, the influences of motion errors are removed, the shift-change double-base forward-looking synthetic aperture radar distance migration correction is finally realized under the condition that the motion errors exist, and precise doppler fuzzy number estimation can be obtained. The method can be applied to other high-squint synthetic aperture radar modes and is wide in application value.

Description

technical field [0001] The invention belongs to the technical field of radar, and in particular relates to the design of a distance migration correction method for a shift-variable bistatic forward-looking synthetic aperture radar. Background technique [0002] Synthetic Aperture Radar (SAR) has strong penetrability and can work around the clock. It has been widely used in military reconnaissance, topographic mapping, vegetation analysis, ocean and hydrological observation, environment and disaster monitoring, resource exploration and crustal research. Small change detection and other fields. [0003] Bistatic forward-looking SAR is a new method of space observation of the earth. Compared with the traditional SAR, the bistatic forward-looking SAR can obtain the non-backscatter information of the target, and has advantages in the range, concealment and anti-interference. In addition, because the bistatic SAR receiver does not contain high-power devices, it has the advantage...

Claims

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Application Information

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IPC IPC(8): G01S7/40
CPCG01S7/4052G01S7/4095
Inventor 杨建宇李敏李文超黄钰林武俊杰李中余蒲巍杨海光
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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