自适应光学波前计算的并行性研究

在自适应光学系统中，波前计算是指出由波前斜率计算，波前复原运算以及波前控制算法等组成的一类处理任务本文研究了从波前计算算法表达层到结构层的优化映射的实现方法，根据现有的并行计算理论提出了适用于波前计算的两种基于单指令流多数据流（ＳＩＭＤ）结构的并行算法，倍增算法和分组算法。在此基础上，以乘－累加（ＭＡＣ）时间和输入／输出（Ｉ／Ｏ）时间作为衡量算法性能的两个指标，在通用数字信号处理ＤＳＰ芯片构筑的单

The Parallel Algorithms of Wavefront Computing in Adaptive Optics

In adaptive optics system, wavefront computation refers to a class of processing consisting of wavefront slope computation, wavefront reconstruction and wavefront control algorithm. We studied the realization of the optimization mapping of the wavefront computing algorithm from the representive layer to the architecture layer. Two SIMD based parallel algorithms, the doubling algorithm and the partitioning algorithm are proposed according to the existing parallel computing theory. On the basis above, the MAC cycle and I/O cycle are used to scale the performance of the two algorithms. Their computing efficiencies on the SIMD array processor are analyzed and compared in detail.