基于控制流的实时波前复原脉动阵列

Real-time Wave-front Reconstruction Based on a Control Flow Systolic Array

波前复原算法是自适应光学波前信号处理的中枢部分。针对波前复原算法计算量大、算法简单规则的特点,本文研究了波前复原部分的并行算法以及复原矩阵的子孔径行系数簇变换和循环矩阵分解法,同时建立了基于控制流的波前复原脉动阵列。针对一套128单元自适应光学系统,进行了基于控制流波前复原脉动阵列和传统复原脉动阵列的实验研究,实验结果表明基于控制流的波前复原脉动阵列在实时性上略逊于传统脉动复原阵列,资源占用仅为传统脉动复原阵列的几十到几百分之一。

Wave-front reconstruction is the core unit of wave-front signal processing of adaptive optics. Based on the numbers of calculations and simple arithmetic of wave-front reconstruction, the discussion for the parallel arithmetic of wave-front reconstruction, sub-aperture row-coefficient translation and matrix cycle-division of reconstruction matrix is proposed in this article. On the basis of above, a real-time wave-front reconstruction on a control flow systolic array is built. In view of a 127-element adaptive optics system, experiments for the control flow systolic array and the traditional systolic array were carried out, and the experimental results show that the systolic array is slightly less than the traditional systolic array on real-time trait, but the resources occupied is much less than that of the traditional systolic array.