SAR成像系统快速矩阵转置算法的设计

Design of Fast Matrix Transposition Algorithm for SAR Image Systems

矩阵转置在实时SAR成像系统中起着重要作用,其效率高低直接决定整个SAR成像系统的处理性能。提出了一种新的矩阵转置方法——矩阵分割拼接法,该方法在传统转置算法的基础上利用EDMA3灵活的搬移方式,有效地提高了转置处理的速度。在此基础上,基于TMS320C6678平台,对该方法的性能进行了测试。测试结果表明,该方法在处理速率上具有较大提升,相较于传统矩阵方法在数据量为512 MB的情况下处理速度提升了255倍,更好地满足了SAR成像的实时性要求。

Matrix transpose plays a critical role in the real-time signal processing of SAR, and the efficiency of matrix transpose greatly influences the performance of the signal processing system. Some popular methods are uti-lized to achieve matrix transpose nowadays. A new matrix transpose method called matrix dividejoint is proposed based on some existing methods and the flexible transfer method of EDM A3. The performance of the proposed meth-od is tested on TMS320C6678. The result demonstrates that this new method performs more efficiently in signal pro-cessing of SAR than traditional methods and handles the matrix transpose problem better. The method is 255 times faster than traditional methods when the data size is 512 MB.