High-frame-rate video SAR (Synthetic Aperture Radar) real-time imaging processing device and method

Abstract

The invention discloses a high-frame-rate video SAR (Synthetic Aperture Radar) real-time imaging processing device and method, and the method comprises the steps: generating an intermediate frequency analog signal, and processing the intermediate frequency analog signal to obtain a transmitting signal; performing down-conversion processing and signal acquisition preprocessing on the echo signal to obtain a zero-intermediate-frequency baseband signal; the signal is divided into two paths of same data, one path is used for data storage, and the other path is used for real-time imaging processing; and the real-time signal processing module receives a path of zero intermediate frequency baseband signal, and the signal is subjected to range direction FFT, range direction dechirp, range-Doppler algorithm, motion error estimation and compensation processing to obtain a real-time imaging result. According to the high-frame-rate video SAR real-time imaging processing device and method, in the signal processing process, parallel processing is adopted for algorithms, hardware system design is optimized at the same time, the correctness of algorithm processing and the high efficiency of division are guaranteed, the algorithm is matched with a hardware system, and the real-time imaging processing efficiency is improved. And a basis is provided for airborne and satellite-borne real-time imaging of the video SAR and subsequent target detection and tracking.

Description

Technical field [0001] The present invention belongs to the field of radar imaging and signal processing, and in particular, the present invention relates to a high frame rate video SAR real-time imaging processing apparatus and method. Background technique [0002] Synthetic Aperture Radar (SAR) is a high-resolution imaging radar that can adapt to harsh environments, traditional optical imaging and infrared remote sensing, and the unique advantage of SAR is the unique advantage of surveying and mapping , Military, disasters, geology, agriculture, forestry and other fields have high practical application value. [0003] With the continuous development of SAR imaging technology, traditional SAR imaging can only get static target images because the image frame update rate is too small, so it is unable to obtain the motion trajectory, speed and other related information in the scene, and even distinguish between still images. Scenario still targets and dynamic goals, but motion targ...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above-mentioned problems existing in the prior art, the present invention provides a high frame rate video SAR real-time imaging processing device and method. Processing, such a parallel processing method ensures the flow of data, and at the same time optimizes the design of the hardware system, and realizes the algorithm in one FPGA, which not only ensures the correctness of algorithm processing and the efficiency of division, but also guarantees the accuracy of the system resources in the hardware system. , and processing capabilities; it provides a basis for the realization of video SAR airborne and spaceborne real-time imaging and subsequent target detection and tracking, and solves the problem of video SAR real-time processing in the existing technology in large imaging scenes and high frame rates. Problems of poor real-time performance, low processing efficiency and low data throughput rate

Images