Ferdjallah M, Barr R E
Electrical Engineering Department, University of Texas at Austin 78712, USA.
Med Biol Eng Comput. 1996 Nov;34(6):431-5. doi: 10.1007/BF02523846.
In an effort to reduce the memory space and processing time required by fast Fourier transforms, enhanced period-peak detection is investigated. The method is based on a combination of Fourier transforms and period-peak detection. The signal is considered as a train of truncated sinusoidal functions. Each truncated sinusoidal function is limited by two successive local extrema. The Fourier transform of the truncated sinusoidal function is a sinc function. The summation of these sinc functions yields an approximate frequency spectrum of the signal.
为了减少快速傅里叶变换所需的内存空间和处理时间，对增强型周期峰值检测进行了研究。该方法基于傅里叶变换和周期峰值检测的结合。信号被视为一系列截断的正弦函数。每个截断的正弦函数由两个连续的局部极值限定。截断正弦函数的傅里叶变换是一个辛格函数。这些辛格函数的总和产生信号的近似频谱。
