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Automatic derivation and implementation of fast convolution algorithms.

机译:快速卷积算法的自动推导和实现。

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This thesis surveys algorithms for computing linear and cyclic convolution. Algorithms are presented in a uniform mathematical notation that allows automatic derivation, optimization, and implementation. Using the tensor product and Chinese Remainder Theorem (CRT), a space of algorithms is defined and the task of finding the best algorithm is turned into an optimization problem over this space of algorithms. This formulation led to the discovery of new algorithms with reduced operation count. Symbolic tools are presented for deriving and implementing algorithms, and performance analyses (using both operation count and run-time as metrics) are carried out. These analyses show the existence of a window where CRT-based algorithms outperform other methods of computing convolutions. Finally a new method that combines the Fast Fourier Transform with the CRT methods is derived. This latter method is shown to be faster for some very large size convolutions than either method used alone.
机译:本文概述了用于计算线性和循环卷积的算法。算法以统一的数学符号表示,可以自动进行推导,优化和实现。使用张量积和中国余数定理(CRT),定义了一个算法空间,并将寻找最佳算法的任务转变为对该算法空间的优化问题。这种表述导致人们发现了减少运算次数的新算法。提供了用于推导和实现算法的符号工具,并进行了性能分析(使用操作计数和运行时间作为度量标准)。这些分析表明存在一个基于CRT的算法优于其他计算卷积方法的窗口。最后,得出了一种结合了快速傅里叶变换和CRT方法的新方法。对于某些非常大的卷积,后一种方法显示出比单独使用任何一种方法都快。

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