Apparatus and method for fast fourier transform/inverse fast fourier transform
    1.
    发明授权
    Apparatus and method for fast fourier transform/inverse fast fourier transform 有权
    快速傅里叶变换/逆快速傅里叶变换的装置和方法

    公开(公告)号:US08023401B2

    公开(公告)日:2011-09-20

    申请号:US12543842

    申请日:2009-08-19

    IPC分类号: H04J11/00

    CPC分类号: G06F17/142

    摘要: An FFT/IFFT apparatus and method are provided. The FFT/IFFT apparatus includes a storage unit, a first FFT/IFFT unit, a second FFT/IFFT unit, and a third FFT/IFFT unit. The storage unit has as many addresses as the number of bits of input data. The first FFT/IFFT unit sequentially stores half of the input data in the storage unit, performs a first-point FFT/IFFT operation while sequentially receiving the other half of the input data, and stores the first-point FFT/IFFT operation result in the storage unit. The second FFT/IFFT unit performs a second-point FFT/IFFT operation on the first-point FFT/IFFTed data, and stores the second-point FFT/IFFT operation result in the storage unit. The third FFT/IFFT unit performs a third-point FFT/IFFT operation on the second-point FFT/IFFTed data, and stores the third-point FFT/IFFT operation result in the storage unit.

    摘要翻译: 提供FFT / IFFT装置和方法。 FFT / IFFT装置包括存储单元,第一FFT / IFFT单元,第二FFT / IFFT单元和第三FFT / IFFT单元。 存储单元具有与输入数据的位数一样多的地址。 第一FFT / IFFT单元顺序地将输入数据的一半存储在存储单元中,在顺序地接收输入数据的另一半的同时执行第一点FFT / IFFT操作,并将第一点FFT / IFFT运算结果存储在 存储单元。 第二FFT / IFFT单元对第一点FFT / IFFT数据执行二点FFT / IFFT运算,并将第二点FFT / IFFT运算结果存储在存储单元中。 第三FFT / IFFT单元对第二点FFT / IFFTed数据执行第三点FFT / IFFT操作,并将第三点FFT / IFFT运算结果存储在存储单元中。