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Radix-2 DIF fast algorithms for polynomial time-frequency transforms

机译:用于多项式时频变换的Radix-2 DIF快速算法

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摘要

The polynomial time-frequency transform (PTFT) converts a one-dimensional polynomial-phase signal (PPS) into a multi-dimensional (MD) output array in the frequency domain from which the phase coefficients are estimated. To significantly reduce the prohibitive computational complexity to deal with high order PPSs, effective decomposition of the overall computational task is important for any practical applications. This paper derives a radix-2 decimation-in-frequency (DIF) fast algorithms for any order of the PPSs by using the periodic and symmetric properties of the PTFT. Compared with other reported fast algorithms, the proposed one is simple in concept and achieves a significant reduction of the required computational complexity
机译:多项式时频变换(PTFT)在频域中将一维多项式相位信号(PPS)转换为多维(MD)输出阵列,据此可估算相位系数。为了显着降低处理高阶PPS的计算复杂性,有效地分解整个计算任务对于任何实际应用都是重要的。本文利用PTFT的周期性和对称特性,针对任意阶数的PPS推导了基数为2的频率抽取(DIF)快速算法。与其他已报道的快速算法相比,该算法概念简单,可显着降低所需的计算复杂度

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