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

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...

AI Technical Summary

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 a station, the low-frequency phase noise component is offset, and the phase error in the echo domain generated by the phase out of synchronization will affect the imaging focus and interferometric phase accuracy

Images