Matrix transposition device and pattern interweaving method of sar imaging system based on sdram chip

Abstract

The present invention discloses an SAR imaging system matrix transposition device based on a SDRAM chip and a pattern interlacing method which are suitable for SAR imaging application with high timeliness requirements. According to the device features of an SDRAM chip, the SDRAM chip is fully utilized in an extra control command period generated by operations such as page jump, read / write, refreshand the like to allow the SAR imaging system matrix transposition device to achieve seamless joint when data is continuously input and output, and the transposition efficiency can reach 100%.

Description

technical field [0001] The invention relates to a matrix transposition device and a pattern interweaving method for a SAR imaging system based on an SDRAM chip, and belongs to the field of SAR imaging. Background technique [0002] SAR is a powerful high-resolution microwave remote sensing imaging radar, which originated in the 1950s. In 1951, Wiley of Goodyear Corporation of the United States first proposed this concept. Compared to optical sensors, SAR has the ability to work around the clock, around the clock, and can see through clouds and vegetation. The original radar echo received by the SAR imaging system is two-dimensional. Various SAR imaging processing algorithms inevitably need to perform multiple data transposition operations in the process of switching the two-dimensional data array from the "time domain to the frequency domain". , the matrix transposition efficiency determines the processing speed and real-time performance of the SAR imaging system. [0003]...

AI Technical Summary

Problems solved by technology

There are many articles using the matrix block transposition method, all of which divide the original matrix into multiple sub-matrices to increase the number of consecutive accesses after each activation in discrete operations, so as to reduce SDRAM chip activation and precharge operations. times, so as to reduce the impact of SDRAM chip control commands on access efficiency, but their transposition efficiency will be more or less affected by the overhead of SDRAM chip control commands

[0005] Whether it is a two-page, three-page or matrix block type, these methods are very effective in data input and output balance transposition. Operations such as writing and refreshing will generate additional control command overhead. These methods fail to make full use of the characteristics of the SDRAM chip device, thereby affecting the transposition efficiency and reducing the real-time performance of the SAR imaging system.

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