Method and apparatus of the variable points IFFT/FFT

Details Method and apparatus of the variable points IFFT/FFT Method and apparatus of the variable points IFFT/FFT

2007-03-02

2009-12-01

Ngo, Ricky (Department: 2416)

Multiplex communications

Generalized orthogonal or special mathematical techniques

Fourier transform

C370S208000

Reexamination Certificate

active

07626923

ABSTRACT:
Provided are a method and apparatus for performing a variable point Inverse Fast Fourier Transform (IFFT)/Fast Fourier Transform (FFT). The apparatus for performing a variable point IFFT includes: an IFFT interpolator generating interpolation data signals having a determined point and interpolating a plurality of interpolation data, the number of which depends on an IFFT operation mode signal into input data; an IFFT operator generating IFFT operation data signals by performing an IFFT operation for the interpolated data signals; an IFFT mode selector selecting and outputting some of the IFFT operation data signals in response to the IFFT operation mode signal so that the selected IFFT operation data have the same number of points as the input data; and a control unit outputting the IFFT operation. Therefore, it is possible to easily compute variably sized IFFT/FFT hardware.

REFERENCES:
patent: 7010027 (2006-03-01), Mestdagh et al.
patent: 7042969 (2006-05-01), Lai
patent: 7200196 (2007-04-01), Li et al.
patent: 7333422 (2008-02-01), Amer
patent: 2003/0145026 (2003-07-01), Jin
patent: 2004/0071079 (2004-04-01), Han
patent: 2004/0133615 (2004-07-01), Hsieh et al.
patent: 1237342 (2002-09-01), None
patent: P1019980070691 (1998-10-01), None
patent: 100284181 (2000-12-01), None
patent: 1020040050540 (2004-06-01), None
Jen-Chih Kuo, Ching-Hua Wen, Chih-Hsiu Lin, and An-Yeu (Andy) Wu. VLSI Design of a Variable-Length FFT/IFFT Processor for OFDM-Based Communication Systems, Jan. 2003, EURASIP Journal on Applied Signal Processing 2003-13, pp. 1306-1316.
Choi, “VLSI Design of a 2048 Point FFT/IFFT by Sequential Data Processing for Digital Audio Broadcasting System,” pp. 479-487 (2002), with English abstract.
Kwon et al., “Design of FFT/IFFT processor that is applied to OFDM wireless LAN system,” pp. 5-8, with English abstract.

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