Echo simulation method of bi-static synthetic aperture radar of fixed station

A simulation method and bistatic technology, applied in the field of radar, can solve the problem of bistatic SAR echo simulation that cannot be fixed at a fixed station

Active Publication Date: 2013-01-23
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the traditional single-base SAR and the existing shift-invariant bistatic SAR echo frequency domain simulation method cannot carry out the fixed station bistatic SAR echo simulation problem, and proposes a fixed station bistatic SAR echo Frequency domain simulation method

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  • Echo simulation method of bi-static synthetic aperture radar of fixed station
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  • Echo simulation method of bi-static synthetic aperture radar of fixed station

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Embodiment Construction

[0053] The present invention mainly adopts the method of simulation experiment to verify, and all steps and conclusions are verified correctly on Matlab2010. The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0054] The structural diagram of the fixed station bistatic SAR system adopted in the specific embodiment of the present invention is as follows figure 1 As shown, the system coordinate system is based on the origin of the coordinates of the imaging center point target O, the platform moves along the y-axis, the x-axis is the direction tangential to the track, and the z-axis is the direction vertical to the ground. Before introducing the method of the present invention, first carry out imaging parameter initialization to system parameter, figure 2 The system parameter table is given. The concrete flow process of the inventive method is as image 3 As shown, the specific steps are as follows:...

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Abstract

The invention discloses an echo frequency domain simulation method of a bi-static synthetic aperture radar (SAR) of a fixed station. According to the method, the shortest slant ranges rR and y between a receiving station and target points are used for linearizing an echo two-dimensional frequency spectrum of an imaging scene, and a two-dimensional frequency transformation expression is derived and respectively introduced into space variant effects of range and azimuth, so that the echo frequency domain of the bi-static SAR of the fixed station can be simulated, and the problem the existing mono-static SAR and the shift invariant bi-static SAR echo frequency domain simulation method cannot be applied to the same mode can be solved; and compared with the echo simulation method based on the time domain accumulation, the echo frequency domain simulation method has the advantages of low computed amount, high operation speed and relatively high computational accuracy and can meet the requirements on simulation and research of the bi-static SAR system of the fixed station.

Description

technical field [0001] The invention belongs to the field of radar technology, and in particular relates to a fixed station bistatic SAR echo simulation method in synthetic aperture radar (Synthetic Aperture Radar, SAR) imaging technology. Background technique [0002] SAR is an all-day, all-weather modern high-resolution microwave remote sensing imaging radar. played an increasingly important role. 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, and its cost is low. [0003] Fixed station bistatic SAR refers to the bistatic SAR in which only one base station moves, while the other base station is almost ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/40
Inventor 武俊杰李中余黄钰林杨建宇杨海光
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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