Synthetic aperture radar (SAR) imaging method, device and system

Abstract

The embodiment of the invention discloses a synthetic aperture radar (SAR) imaging method and device. A transmitting antenna pattern, a receiving antenna pattern, a first sub-pulse signal and a second sub-pulse signal are configured according to system parameters of an SAR, wherein the transmitting antenna pattern includes a first transmitting antenna pattern and a second transmitting antenna pattern, and the first transmitting antenna pattern is converted into the second transmitting antenna pattern by adjusting phase parameters. The SAR imaging method further comprises the steps that the first sub-pulse signal is transmitted according to the first transmitting antenna pattern and irradiates a forward area of a target; the second sub-pulse signal is transmitted according to the second transmitting antenna pattern after a preset time interval to irradiate a backward area of the target; a forward echo signal and a backward echo signal are received at the same time according to the receiving antenna pattern, and the forward echo signal and the backward echo signal are separated before being each used for imaging.

Description

technical field [0001] The invention relates to the technical field of radar communication and signal processing, in particular to a synthetic aperture radar imaging method, device and system. Background technique [0002] Synthetic Aperture Radar (SAR) uses the relative motion between the radar and the target to synthesize a small real antenna aperture into a radar with a larger equivalent antenna aperture by means of data processing. Produces high-resolution images that work 24 / 7 to effectively identify camouflage and penetrate cover. [0003] In the existing dual-beam SAR imaging technical solution, when transmitting, the first sub-pulse signal is simultaneously transmitted according to the transmitting antenna pattern to illuminate the forward area and the backward area of ​​the target respectively; when receiving, the forward and backward areas are simultaneously received according to the receiving antenna pattern. The forward echo signal and the backward echo signal a...

AI Technical Summary

Problems solved by technology

[0005] The existing dual-beam SAR imaging technology scheme, when transmitting, simultaneously transmits the first sub-pulse signal according to the transmitting antenna pattern to illuminate the forward area and backward area of ​​the target; when receiving, simultaneously receives the forward echo according to the receiving antenna pattern signal and the backward echo signal, and separate the forward echo signal and the backward echo signal and then image them respectively, so that when performing spectrum separation on the received forward echo signal and backward echo signal, Has poor spectral separation and, therefore, poor subsequent imaging

Images