针对在空时自适应处理(STAP)中通常采用Cholesky分解矩阵求逆算法求杂波协方差矩阵的逆矩阵,设计了基于FPGA的并行化Cholesky分解矩阵求逆运算模块的实现架构。该模块分成Cholesky分解子模块、三角矩阵求逆子模块和三角矩阵相乘子模块等三部分,流水执行求逆运算。通过实测与仿真,对矩阵阶数、运算并行度、FPGA占用资源、运算时间和运算精度等要素之间的关系进行了详细分析。

Aiming at the arithmetic of the sample covariance matrix inversion with Cholesky decomposition in the space-time adaptive processing(STAP), a parallelizing construction of the arithmetic module based on FPGA is designed for matrix inversion with Cholesky decomposition, containing three sub modules of Cholesky decomposition, triangle matrix inversion, and triangle matrix multiplication. After measuring and simulating, the relationships of order of the matrix,parallelism degree,occupied resources of the FPGA, calculating time, and arithmetic precision are analysised detailedly.

TN957

核高基重大专项资助课题(2016ZX01012101-003)