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Bistatic synthetic aperture radar location error calculation method

A synthetic aperture radar, positioning error technology, applied in radio wave measurement systems, instruments, etc., can solve the problem that the positioning error cannot be accurately calculated.

Active Publication Date: 2017-07-28
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0007] In order to solve the difficulties in the analysis of bistatic synthetic aperture radar positioning errors and the problem that the positioning error cannot be accurately calculated in the traditional R-D positioning model, the present invention proposes a bistatic synthetic aperture radar positioning error calculation method, starting from the bistatic synthetic aperture radar Starting from the configuration mechanism, the gradient analysis method is used to complete the calculation of the positioning error caused by the bistatic distance and the Doppler center frequency shift, and the specific formula of the bistatic synthetic aperture radar target positioning error is derived

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[0052] In order to facilitate those skilled in the art to understand the technical content of the present invention, the content of the present invention will be further explained below in conjunction with the accompanying drawings.

[0053] Such as figure 1 Shown is the scheme flowchart of the present invention, the scheme of the present invention is: a kind of bistatic synthetic aperture radar positioning error calculation method, comprising:

[0054] S1. Construct the echo model of the bistatic synthetic aperture radar; specifically include the following sub-steps:

[0055] S11, let τ be the time in the distance direction, and η be the time in the azimuth direction, then the echo signal is:

[0056]

[0057] Among them, R(η) represents the bibase distance and course,

[0058] (x,y) is the target position coordinates, here is the position parameter, (x T (η),y T (η), h T (η)) and (x R (η),y R (η), h R (η)) are respectively the position coordinates of the transmi...

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Abstract

The present invention discloses a bistatic synthetic aperture radar location error calculation method. The bistatic synthetic aperture radar configuration mechanism is employed and the gradient analytical method is employed to complete calculation of the bistatic distance and location errors caused by Doppler center frequency shift to derive a bistatic synthetic aperture radar target location error concrete formula. The problem of difficulties in the bistatic synthetic aperture radar location error analysis and the problem that the location errors in a traditional R-D location model cannot be accurately calculated are solved. According to the error calculation formula, the location precision of the bistatic synthetic aperture radar can be calculated so as to realize measurement and assessment of the bistatic synthetic aperture radar location precision.

Description

technical field [0001] The invention belongs to the technical field of radar signal processing, in particular to an airborne bistatic SAR target positioning technology. Background technique [0002] Synthetic Aperture Radar (SAR) can provide high-resolution images of the observation area all day and all day, so it has played an increasingly important role in both civilian and military fields in recent years. Typical applications of SAR include disaster monitoring, resource exploration, geological surveying and mapping, military reconnaissance, etc. [0003] Bistatic SAR has many outstanding advantages due to the separation of transceivers. It can obtain the non-backscatter information of the target, and has the characteristics of long range, concealment and strong anti-interference. In addition, since the bistatic SAR receiver does not contain high-power devices, it has low power consumption, small size, and light weight, and is easy to carry on various types of aircraft, a...

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Application Information

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IPC IPC(8): G01S7/40
CPCG01S7/40
Inventor 武俊杰胥遇时杜宁杨建宇张强辉李中余杜科
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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