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Dual-station SAR receiver kinematic error compensating method based on navigation satellite signals

A navigation satellite and motion error technology, applied in the field of satellite navigation signal processing, can solve problems such as low processing efficiency

Active Publication Date: 2019-03-22
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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  • Dual-station SAR receiver kinematic error compensating method based on navigation satellite signals
  • Dual-station SAR receiver kinematic error compensating method based on navigation satellite signals
  • Dual-station SAR receiver kinematic error compensating method based on navigation satellite signals

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[0104] 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.

[0105] 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.

[0106] The bi-station SAR receiver motion error...

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Abstract

The invention provides a dual-station SAR receiver kinematic error compensating method based on navigation satellite signals. The method includes the steps of establishing a Doppler rate and kinematicerror relation model, estimating and compensating for receiver method planar kinematic errors, and estimating and compensating for receiver cruise direction kinematic errors. The method has the advantages that according to the structural characteristics of a dual-station SAR based on the navigation satellite signals, the method based on the instantaneous Doppler rate is put forward to correct thekinematic errors of a receiving platform; the real model of three-dimensional movement errors is sufficiently considered in the method, and the kinematic error estimating and compensating can be effectively conducted; no interpolation or iteration treatment needs to be conducted in the method, the processing efficiency is high, and a good imaging result is obtained.

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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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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