Bi-CWSAR (Bistatic Continuous Wave Synthetic Aperture Radar) remote sensing imaging method

A technology of synthetic aperture radar and remote sensing imaging, which is applied in radio wave measurement system, radio wave reflection/re-radiation, utilization of re-radiation, etc. It can solve the problem of different signal sending and receiving paths, bistatic continuous wave synthetic aperture radar remote sensing imaging difficulties, etc. question

Active Publication Date: 2013-08-14
INST OF ELECTRONICS CHINESE ACAD OF SCI
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Problems solved by technology

However, the independent transceiver platform means that the signal transceiver path is different, resulting in the signal history containing two root terms
This has brought great difficulties to bistatic continuous wave synthetic aperture radar remote sensing imaging

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  • Bi-CWSAR (Bistatic Continuous Wave Synthetic Aperture Radar) remote sensing imaging method
  • Bi-CWSAR (Bistatic Continuous Wave Synthetic Aperture Radar) remote sensing imaging method
  • Bi-CWSAR (Bistatic Continuous Wave Synthetic Aperture Radar) remote sensing imaging method

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Embodiment Construction

[0020] A bistatic continuous wave synthetic aperture radar remote sensing imaging method of the present invention breaks through the limitation of traditional continuous wave synthetic aperture radar, adopts sending and receiving antennas to be placed on different platforms, continuously transmits and receives signals to receive data, and utilizes deskewing operation Reduce data rate and sampling requirements. Accurately express the influence of the range time variable on the echo delay under the continuous wave system, obtain the accurate echo delay expression, and then establish the echo signal time domain model; according to the echo signal time domain model and time frequency domain mapping relationship, Use the series inversion method to solve the problem that the signal history contains double root sign terms, and solve the frequency domain expression of the nonlinear component of the signal; and use the characteristics of Fourier transformation to derive the signal analy...

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Abstract

The invention discloses a Bi-CWSAR (Bistatic Continuous Wave Synthetic Aperture Radar) remote sensing imaging method. According to the Bi-CWSAR remote sensing imaging method, a sending and receiving antenna division mode is adopted for solving an antenna coupling problem, a Bi-CWSAR time domain echo signal model is established by accurately analyzing a signal process and solving echo delay time, a series inversion method and a Fourier transformation property are ingeniously used for establishing a two-dimensional analysis spectrum, and accordingly, foundations and supports are provided for a Bi-CWSAR remote sensing imaging technology.

Description

technical field [0001] The invention relates to the technical field of radar remote sensing imaging, and relates to a bistatic continuous wave synthetic aperture radar remote sensing imaging method, which is applied to the field of continuous wave synthetic aperture radar for earth observation. Background technique [0002] Synthetic aperture radar technology is currently an important technical means for ground remote sensing, imaging and monitoring. It can realize all-day, all-weather high-resolution imaging of a large coverage area. Wide range of applications. Continuous wave synthetic aperture radar reduces the peak power of the system by increasing the pulse duration, thereby greatly reducing the system volume, quality, cost and risk, and at the same time improving the flexibility of the system. Monitoring will play a major role. Since CW SAR systems are based on continuously transmitting and receiving pulses, separate transmitting and receiving antennas are required. ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/90G01S7/02
Inventor 刘悦邓云凯王宇
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI
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