Variable point IFFT/FFT method and device

摘要

It relates to variable point IFFT/FFT method and the device, being input the IFFT interpolation section and the interpolation data signal which form the interpolation data signal where the quantity inserts plural interpolation data which variable are done in the point of the input data due to the IFFT operational modal control signal, makes the existing fixed point possess with the IFFT hardware, doing opposite fast Fourier transform operation, in order to be input the IFFT arithmetic logical unit and the operational data signal which form the operational data signal, to possess the same point as the point of the input data, selecting just part from among the operational data signals due to the IFFT operational modal control signal, the IFFT mode which it outputsFrom the selective section and the IFFT operational modal control signal is formed the control section which to the IFFT interpolation section and the IFFT mode selective section is output. Because of this, the calculation of IFFT/FFT of variable size can be offered hardware simply.