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Motion Error Compensation Method for Bistatic SAR Receiver Based on Navigation Satellite Signal

A navigation satellite and motion error technology, applied in the field of satellite navigation signal processing, can solve problems such as low processing efficiency, and achieve the effect of high processing efficiency and good imaging results

Active Publication Date: 2021-12-28
曲卫
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Problems solved by technology

Generally, iterative processing is required in compensation, resulting in low processing efficiency

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  • Motion Error Compensation Method for Bistatic SAR Receiver Based on Navigation Satellite Signal
  • Motion Error Compensation Method for Bistatic SAR Receiver Based on Navigation Satellite Signal
  • Motion Error Compensation Method for Bistatic SAR Receiver Based on Navigation Satellite Signal

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[0103] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0104] According to the structural characteristics of the dual-station SAR based on navigation satellite signals, the present invention proposes a method based on instantaneous Doppler frequency modulation to correct the motion error of the receiving platform. This method fully considers the real model of 3D motion error, and can effectively estimate and compensate motion error. Moreover, the method does not need interpolation and iterative processing, has higher processing efficiency, and obtains better imaging results.

[0105] The bi-station SAR receiver motion error...

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Abstract

The invention provides a motion error compensation method for a dual-station SAR receiver based on navigation satellite signals, including: establishing a relationship model between Doppler modulation frequency and motion error; estimating and compensating the plane motion error of the receiver method; Error estimation and compensation. The advantages are: according to the structural characteristics of the bi-station SAR based on the navigation satellite signal, the present invention proposes a method based on the instantaneous Doppler frequency modulation to correct the motion error of the receiving platform. This method fully considers the real model of 3D motion error, and can effectively estimate and compensate motion error. Moreover, the method does not need interpolation and iterative processing, has higher processing efficiency, and obtains better imaging results.

Description

technical field [0001] The invention belongs to the technical field of satellite navigation signal processing, and in particular relates to a motion error compensation method for a dual-station SAR receiver based on navigation satellite signals. Background technique [0002] Usually, when theoretically analyzing and researching the imaging method of bistatic synthetic aperture radar (SAR) based on navigation satellite signals, it is assumed that the transceiver platform moves along an ideal uniform linear direction. But in the actual situation, the trajectory of the transceiver platform cannot reach this ideal state. The airborne platform will be unstable due to the instability of the medium and low air flow, its own flight speed and acceleration, and there will be a large error with the ideal trajectory. The movement of the carrier aircraft away from the ideal trajectory will destroy the coherence of the echo signal. If these motion errors are not compensated, the data rec...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/90G01S7/40
CPCG01S7/40G01S13/90G01S13/9058
Inventor 曲卫李云涛杨君孟磊朱卫纲何永华邱磊
Owner 曲卫
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