Bistatic SAR real-time echo simulation method based on DSP and FPGA architectures

Abstract

The invention discloses a bistatic SAR (Synthetic Aperture Radar) real-time echo simulation method based on DSP (Digital Signal Processor) and FPGA (Field Programmable Gate Array) architectures, which comprises the following steps of: initializing a corresponding FPGA in a bistatic SAR in a DSP, and calculating FPGA real-time control parameters; and completing one-dimensional range profile calculation of a scene target scattering point by using the FPGA, finally performing pipelined convolution on a calculation result and a reference signal obtained by AD sampling, playing the SAR echo signal from a DA end, and synthesizing SAR echo data simulated by two base SAR channels to generate a bistatic SAR echo signal. According to the method, the high-performance low-power-consumption real-time operating system of the DSP and the parallel computing performance of the FPGA are utilized, the one-dimensional range profile computing efficiency is greatly improved, the echo simulation speed can adapt to the test requirement of the high repetition frequency SAR radar, the use scene is expanded, and the method can adapt to more SAR radars.

Description

technical field [0001] The invention belongs to the technical field of echo simulation, and in particular relates to a dual-base SAR real-time echo simulation method based on a DSP and FPGA architecture. Background technique [0002] Synthtic Aperture Radar (Synthetic Aperture Radar, referred to as SAR) is an all-day, all-weather modern high-resolution microwave imaging radar. It is a radar system that uses the principle of synthetic aperture, pulse compression technology and signal processing technology to obtain high-resolution range and azimuth directions only by real small-aperture antennas. Compared with optical imaging systems, it is not afraid of the influence of ground cover, and can even detect ground feature information through clouds and vegetation. Whether it is in the civil or military field, it is the key research direction of radar technology and signal processing technology in various countries. Bistatic SAR radar is the abbreviation of bistatic SAR radar. ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a dual-base SAR real-time echo simulation method based on DSP and FPGA architecture, which solves the problems of calculation amount and speed of the current double-base SAR echo simulation, improves the echo simulation speed, and shortens the SAR scene Echo calculation time

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