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A construction method of forward looking linear array three-dimensional synthetic aperture radar system

A technology of synthetic aperture radar and construction method, applied in radio wave measurement system, radio wave reflection/re-radiation, utilization of re-radiation, etc., can solve the problem of inability to obtain real-time three-dimensional terrain information in front

Active Publication Date: 2012-05-30
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for constructing a forward line-of-sight array three-dimensional synthetic aperture radar system (SAR system) in order to overcome the shortcoming that the existing synthetic aperture radar system (SAR system) cannot obtain real-time three-dimensional terrain information in front

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  • A construction method of forward looking linear array three-dimensional synthetic aperture radar system
  • A construction method of forward looking linear array three-dimensional synthetic aperture radar system
  • A construction method of forward looking linear array three-dimensional synthetic aperture radar system

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Embodiment Construction

[0056] The present invention mainly uses the simulation experiment method to verify the feasibility of the system model, and all steps and conclusions are verified correctly on VC++ and MATLAB7.0. The specific implementation steps are as follows:

[0057] Step 1: Construction of the line array transmitting / receiving system

[0058] The linear array transmitter / receiver on the moving platform of the forward line-of-sight array three-dimensional synthetic aperture radar system includes the following parts: a transmitter, a receiver, a T / R switch, a feeder control switch, 800 feeders and 800 linear array feed elements, the system block diagram is attached figure 1 As shown, the transmitter and receiver are connected to the control switch with a T / R switch, the transmitter and receiver are respectively connected to the T / R switch, the control switch is connected to the receiver, and the control switch is connected through 800 feeders and 800 A line array feeder is connected, and...

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Abstract

The invention discloses a construction method of forward looking linear array three-dimensional synthetic aperture radar system, which takes advantage that: the antenna phase centre control precision of the single stimulation linear array three-dimensional synthetic aperture radar is high; the forward looking synthetic aperture radar system can acquire the ahead topographical information; the method causes the beam of the single stimulation linear array three-dimensional SAR to irradiate in a forward looking manner by using the mode of combining the single stimulation linear array three-dimensional SAR system and forward looking SAR system, then processes the received echo data by back-projection algorithm of the standard in real time to acquire the three-dimensional imaging result of ahead surveying area; the method can acquire the information of the three-dimensional topographical ahead the aircraft in advance and at real time; the invention provides a new method for the precise guide, and navigation, approaching and landing and blind landing of the aircraft.

Description

Technical field: [0001] The technical invention belongs to the technical field of radar, and in particular relates to the technical field of synthetic aperture radar (SAR) imaging. Background technique: [0002] Synthetic Aperture Radar (SAR) is a high-resolution microwave imaging system, which relies on the relative motion between the radar and the target to form a synthetic array to obtain horizontal high resolution, and uses large bandwidth signals to achieve vertical high resolution. SAR is based on the conventional SAR horizontal dimension and longitudinal dimension with an additional tangential horizontal dimension, and it also relies on the relative motion between the radar and the target to obtain the tangential horizontal resolution. 3D imaging is an important feature that distinguishes 3D SAR from other remote sensing imaging systems. Because of its all-weather, all-time, and long-distance characteristics, it plays an irreplaceable role in terrain mapping, environm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/90
Inventor 张晓玲王银波郭少南韩云钱忠清李伟华师君
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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