实时SAR成像系统矩阵转置方法研究与实现

摘要

Synthetic Aperture Radar(SAR) is a high-resolution imaging radar,while the matrix transpose is a critical step in the real-time signal processing of SAR imaging, the efficiency of matrix transpose greatly influence the performance of the signal processing system.Some popular methods can be utilized to achieve the matrix transpose, such as in row out column (IROC) or in column out row(ICOR),two-page or three-page transpose method,etc.However,these methods are not very effi-cient.In this paper, a new matrix transpose method is proposed based on the existing matrix transpose methods.An actual hardware platform is used for real-time imaging process using the new matrix transpose method described in this paper. The efficiency of matrix transpose is 78% with the entire SAR imaging runtime of 10 seconds.Experimental result demonstrates that the method proposed is efficient for solving the matrix transpose problem.%合成孔径雷达(SAR)是一种高分辨率成像雷达,而矩阵转置是实时SAR成像信号处理中一个很重要的操作,矩阵转置的效率高低将直接决定整个SAR成像信号处理系统的性能.对于矩阵转置,可采用行进列出或列进行出、两页式或三页式转置等方法进行处理,但这些方法处理时间较长,转置效率较低.在现有矩阵转置方法的基础上,提出了一种新的矩阵转置方法.在实际硬件平台上利用提出的矩阵转置方法进行了实时SAR成像处理,所得结果的矩阵转置效率为78％,整个SAR成像处理时间为10秒.测试结果表明,该方法对解决矩阵转置问题是行之有效的.