一种二维访问效率均衡的SAR数据矩阵转置方法  

A SAR Data Matrix Transpose Method of Efficiency Balanced Two Dimensional Access

作　　者：刘小宁[1] 谢宜壮[1] 赵博雅[1] 陈禾[1] 杨晨[1] 

机构地区：[1]北京理工大学信息与电子学院,北京100081

出　　处：《电子学报》2016年第1期33-38,共6页Acta Electronica Sinica

摘　　要：针对SAR成像矩阵转置效率偏低的问题,提出了矩阵分块三维映射法.该方法基于带有bank划分的存储介质并利用其数据访问特性,通过矩阵分块和跨bank优先数据访问方式将二维数据矩阵映射至存储介质的三维存储空间,能够充分发挥存储介质的数据访问效率.实测结果表明,该方法使二维数据的访问效率都接近于顺序访问的效率,极大提高了SAR成像的矩阵转置效率.A sub-matrix three-dimensional mapping method was proposed to improve the matrix transpose efficiency for SAR imaging processing. This method,which is based on storage medium consisting of several banks and uses its data access features,maps two-dimensional data matrix to three-dimensional space of storage medium. The mapping is implemented through sub-matrix and cross bank first data access,and it can give full play to data access efficiency of storage medium.The experimental results showthat this method enables the data access efficiency of both dimensional to be closed to sequential access efficiency. It greatly improved the matrix transpose efficiency for SAR imaging processing.

关 键 词：SAR成像 矩阵转置 跨行访问 三维映射 

分 类 号：TN952[电子电信—信号与信息处理]