Radar echo real-time simulation method based on FPGA and DSP

Abstract

The invention belongs to the technical field of radar echo simulation, and particularly relates to a radar echo real-time simulation method based on an FPGA and a DSP. The method comprises the following steps that 1, the following data of the position coordinate of a radar at each direction moment, the coordinate and grey value of each pixel point in a rectangular face object scene and the conjugate item of a distance direction matching function are prestored in an FPGA chip, and according to the data prestored in the FPGA chip, the distance unit serial number corresponding to each pixel point in the rectangular face object scene at each direction moment and direction echo data are obtained; 2, the FPGA chip transmits the two parts of data calculated and obtained in the step 1 to a DSP chip, the DSP chip carries out data integration on the data from the FPGA chip, and a matrix H is obtained; 3, the DSP chip transmits the matrix H to the FPGA chip, and a radar echo data matrix is obtained by the FPGA chip according to each line of elements of the matrix H and the conjugate item of the distance direction matching function.

Description

technical field [0001] The invention belongs to the technical field of radar echo simulation, in particular to a real-time radar echo simulation method based on FPGA and DSP, which can provide accurate echo data for imaging system design and index evaluation, and test and inspect SAR imaging processing systems. Background technique [0002] The traditional SAR (Synthetic Aperture Radar) is used in the field of reconnaissance. The echo data only needs to be generated after a single simulation task is determined, and there is no strict requirement on the echo simulation time. Most echo simulators are based on PC (Personal Computer) platform simulation, the main purpose is to provide accurate echo data for system design, imaging and index evaluation. With the continuous expansion of SAR application fields, especially in the application of integrated navigation control, SAR simulation participates in closed-loop simulation experiments. The SAR simulator needs to provide echo si...

AI Technical Summary

Problems solved by technology

In the SAR simulation system of the traditional PC and workstation platform, due to its disadvantages in simulation efficiency, data transmission and data form, it cannot be applied in the real-time simulation environment

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