Synthetic aperture radar real-time transposition processing method and system

Abstract

The invention provides a real-time transposition processing method and system for a synthetic aperture radar. The processing method comprises the following steps that the data of a synthetic aperture radar echo data matrix are read; the read data of the synthetic aperture radar echo data matrix are written in an nth convertor of a conversion module in an orientation direction or a distance direction; the synthetic aperture radar echo data matrix transposed by the nth convertor is read from the nth convertor in the corresponding distance direction or orientation direction; when the data are read from the nth convertor, the n+1th convertor is started, and the data of a next synthetic aperture radar echo data matrix are written in the corresponding orientation direction or distance direction. According to the method, the transposition performance can be greatly improved, transposition efficiency is improved, the pipeline operation of transposition is achieved, the transposition operation can be carried out ceaselessly, and the continuous real-time transposition function is achieved.

Description

technical field [0001] The invention relates to the technical field of radar signal processing, in particular to a synthetic aperture radar real-time transposition processing method and system. Background technique [0002] With the advancement of science and technology, users have higher and higher requirements for the accuracy and real-time performance of synthetic aperture radar, which leads to the increasing difficulty of synthetic aperture radar signal processing, especially a key step of synthetic aperture radar signal processing: radar echo Transpose of the data matrix. In related technologies, radar echo data is generally stored in SDRAM (Synchronous Dynamic Random Access Memory, Synchronous Dynamic Random Access Memory). However, due to the characteristics of SDRAM itself, when performing the transposition operation of the radar echo data matrix, Burst read and write operations The efficiency will be reduced to less than 10%, seriously affecting the performance of ...

AI Technical Summary

Problems solved by technology

In related technologies, radar echo data is generally stored in SDRAM (Synchronous Dynamic Random Access Memory, Synchronous Dynamic Random Access Memory). However, due to the characteristics of SDRAM itself, when performing the transposition operation of the radar echo data matrix, Burst read and write operations The efficiency will be reduced to less than 10%, seriously affecting the performance of the synthetic aperture radar real-time signal processing system, and in the solutions of related technologies, either there is a high requirement for the SDRAM controller, or the performance of the system is not significantly improved. It cannot effectively improve the performance of the synthetic aperture radar real-time signal processing system and meet the requirements of users

[0003] In related technologies, the patent with the publication number CN1877360A improves the double-page structure and proposes a three-page structure, but still does not improve the transposition efficiency; the patent with the patent number CN102279386A divides the data matrix into several 64x64 fixed The small block matrix of the size can improve the efficiency of transposition to a certain extent, but once the size of the data matrix changes, the optimal segmentation cannot be performed, and the efficiency of transposition processing will be greatly reduced; The matrix segmentation method has been improved, so that when the size of the matrix changes, the efficiency of the transposition can also be improved, but the efficiency of the improvement is not high; the patent No. CN103135096A further improves the data matrix segmentation method, so that each sub The number of matrix points is equal to the capacity of one line of SDRAM, effectively reducing the number of line-wrapping operations, but this method does not fully utilize the characteristics of SDRAM, and the efficiency of transposition is not optimal, and the patent uses a single storage array design, resulting in The transpose operation cannot be streamlined, which increases the limitations of application

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