Bistatic synthetic aperture radar phase synchronization method, apparatus, device and storage medium

A synthetic aperture radar and phase synchronization technology, which is applied in the radar field, can solve the problems of not being able to offset low-frequency phase noise components, affecting imaging focus and interferometric phase accuracy, and phase noise irrelevance, so as to improve work efficiency and increase flexibility.

Active Publication Date: 2019-06-21
INST OF ELECTRONICS CHINESE ACAD OF SCI
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  • Application Information

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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

Method used

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  • Bistatic synthetic aperture radar phase synchronization method, apparatus, device and storage medium
  • Bistatic synthetic aperture radar phase synchronization method, apparatus, device and storage medium
  • Bistatic synthetic aperture radar phase synchronization method, apparatus, device and storage medium

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Embodiment 1

[0028] In the embodiment of the present invention, the second SAR receives the second phase synchronization signal sent by the first SAR to obtain the second synchronization reception signal, and the first SAR receives the first phase synchronization signal sent by the second SAR to obtain the first synchronization signal receiving the signal, determining the peak phase difference between the first synchronously received signal and the second synchronously received signal, and using the first preset rule to determine the compensation phase according to the peak phase difference, and according to the compensation phase, the second SAR received by the first Phase compensation is performed on the echo signal generated by the radar signal emitted by the SAR.

[0029] see figure 1 , figure 1 A schematic flow chart of a method provided by an embodiment of the present invention, the method mainly includes the following steps:

[0030] S101. Determine the pulse width of the first ph...

Embodiment 2

[0053] see figure 2 , figure 2 A schematic flow chart of a bistatic SAR phase synchronization method based on coded signals provided by another embodiment of the present invention is applied to a dual-star SAR system. The dual-star SAR system includes at least a first SAR and a second SAR. The method mainly includes The following steps:

[0054] S201. Determine pulse widths of the first and second phase synchronization signals.

[0055] In this embodiment, the pulse width of the first phase synchronization signal is the same as the pulse width of the second phase synchronization signal.

[0056] S202. Determine start times for transmitting the first and second phase synchronization signals.

[0057] The starting time is located between two adjacent times of transmitting radar signals.

[0058] S203. Acquire the carrier frequency of the radar signal.

[0059] The carrier frequency of the radar signal can be obtained from the radar parameters.

[0060] S204. Determine th...

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Abstract

The invention relates to a bistatic synthetic aperture radar phase synchronization method and belongs to the field of radar technologies. The bistatic synthetic aperture radar phase synchronization method includes the following steps that: echo signals generated by radar signals transmitted by a first SAR are simultaneously received by the first SAR and a second SAR, so that first echo receiving signals and second echo receiving signals are obtained; the first SAR receives phase synchronization signals transmitted by the second SAR, so that first synchronous receiving signals are obtained; thesecond SAR receives phase synchronization signals transmitted by the first SAR, so that second synchronization receiving signals are obtained; peak phase difference between the first synchronous receiving signals and the second synchronous receiving signals is determined, and a compensation phase is determined through a first preset rule according to the peak phase difference; and phase compensation is performed on the second echo receiving signals according to the compensation phase. The invention also discloses a bistatic synthetic aperture radar phase synchronization device based on encoded signals. With the device adopted, a condition that the normal operation of a radar is interrupted can be avoided, and therefore, the working efficiency of the radar can be improved.

Description

technical field [0001] The invention relates to the field of radar technology, in particular to a coded signal-based bistatic synthetic aperture radar phase synchronization method, device, electronic equipment and storage medium. Background technique [0002] Synthetic Aperture Radar (SAR) is an active microwave imaging radar that can be installed on aircraft, satellites, missiles and other flying platforms. Because SAR can observe all-weather and all-weather, and has certain surface penetration capabilities, SAR has unique advantages in the application of disaster monitoring, resource exploration, ocean monitoring, environmental monitoring, surveying and mapping, and military reconnaissance. . [0003] Compared with monostatic radar, bistatic radar has the advantages of flexible configuration, rich information acquisition, anti-interception and anti-interference due to the special configuration of bistatic radar. These advantages and application prospects have made bistati...

Claims

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Application Information

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IPC IPC(8): G01S13/90G01S7/41
Inventor 梁达邓云凯王宇金国栋刘开雨张衡禹卫东刘大成李创
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI
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