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Index Generation Scheme for Prime Factor Algorithm Based Mixed Radix Discrete Fourier Transform (DFT)
Index Generation Scheme for Prime Factor Algorithm Based Mixed Radix Discrete Fourier Transform (DFT)
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机译：基于素因数算法的混合基数离散傅里叶变换（DFT）索引生成方案
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摘要
In one embodiment, a processor performs a method of generating pipelined data read indexes and data write indexes for a Prime Factor Algorithm (PFA) Discrete Fourier Transform (DFT) without look-up tables. The processor is adapted to factorize an ‘N’ point PFA DFT into one or more mutually prime factors and zero or more non-prime factors, calculate a 0th column index for an ith row (Xi0), calculate an IndCor when the value of Xi0 equals zero and when a row number (i) does not equal zero, calculate Xij, generate the data read indexes, perform a DFT kernel computation on Lk point for the mutually prime factors and the non-prime factors, and generate the data write indexes for the mutually prime factors and the non-prime factors. Xij represents ith row and jth column of 2D input Buffer and enables a selection of a linear index from the 2D input buffer.
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