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A phase synchronization method and device

A technology of phase synchronization and phase difference, applied in synchronization devices, synchronization devices, measurement devices, etc., can solve the problems of inability to offset low-frequency phase noise components, affecting imaging focus and interference phase accuracy, and phase noise being irrelevant, so as to improve imaging. quality effect

Active Publication Date: 2020-11-10
INST OF ELECTRONICS CHINESE ACAD OF SCI
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Problems solved by technology

However, since the main and auxiliary satellites use different crystal oscillators, on the one hand, there will be a phase error introduced by the frequency error of the crystal oscillator in the azimuth direction, which will accumulate over time; In the case of low-frequency phase noise components, the phase error in the echo domain caused by phase asynchrony will affect the imaging focus and interferometric phase accuracy; therefore, phase synchronization is required

Method used

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Embodiment Construction

[0045] In the embodiment of the present invention, the second SAR receives the first phase synchronization signal sent by the first SAR to obtain the first received signal; the first SAR receives the second phase synchronization signal sent by the second SAR to obtain the first received signal Two received signals; determine the peak phase difference between the first received signal and the second received signal, and determine the compensation phase according to the peak phase difference using a first preset rule; according to the compensation phase, the second SAR received Phase compensation is performed on the echo signal generated by the radar signal emitted by the first SAR.

[0046] The phase synchronization method provided by the embodiment of the present invention, such as figure 1 As shown, the method includes:

[0047] Step 101: The second SAR receives the first phase synchronization signal sent by the first SAR to obtain a first received signal; and the first SAR ...

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Abstract

The invention discloses a phase synchronization method. A second Synthetic Aperture Radar (SAR) receives a first phase synchronization signal sent by a first SAR to obtain a first received signal; the first SAR receives a signal sent by the second SAR The second phase synchronization signal of the second received signal to obtain the second received signal; determine the peak phase difference between the first received signal and the second received signal, and determine the compensation phase according to the peak phase difference using a first preset rule; according to the Compensating the phase, performing phase compensation on the echo signal received by the second SAR and generated by the radar signal transmitted by the first SAR. The invention also discloses a phase synchronization device, a storage medium and an information processing device.

Description

technical field [0001] The present invention relates to Synthetic Aperture Radar (SAR, Synthetic Aperture Radar) technology, in particular to a phase synchronization method and device. Background technique [0002] SAR is a microwave imaging radar, which can be installed on flying platforms such as airplanes, satellites or spacecrafts for all-weather and all-weather observation of the earth; at the same time, SAR has a certain ability to penetrate the ground; therefore, the SAR system is Disaster monitoring, resource exploration, marine monitoring, environmental monitoring, crop census and yield estimation, surveying and mapping, and military reconnaissance have unique advantages, and can play a role that other remote sensing methods are difficult to play. More and more applications are in civil and national defense field. [0003] The multi-satellite formation SAR system is an important new concept radar system. The system mounts the radar on multiple satellites flying in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L7/00G01S13/90
CPCG01S13/90H04L7/007G01S7/006G01S7/4004G01S13/003G01S13/9058G01S7/41H04B7/18513H04W56/001H04W56/0035H04B17/336
Inventor 金国栋刘开雨王宇邓云凯贾小雪李创
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI
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