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US 2004/0071079 A1Published application
Fast fourier transform device
AssigneeLG Electronics Inc.
InventorJung-Il Han
Life of this patent
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Abstract
Disclosed is a fast Fourier transform device of a wireless LAN orthogonal frequency division multiplexing (OFDM) system. The device comprises: an FFT/IFFT unit constituted with one hardware, for performing a fast Fourier transform (FFT) and an inverse fast Fourier transform (IFFT); and a control signal input unit for outputting a control signal for controlling an operation of the FFT/IFFT unit.
Claims12
A fast Fourier transform device and comprising:
- an FFT/IFFT unit constituted with one hardware, for performing a fast Fourier transform (FFT) and an inverse fast Fourier transform (IFFT);
- and
- a control signal input unit for outputting a control signal for controlling an operation of the FFT/IFFT unit.
A fast Fourier transform device comprising:
- an FFT/IFFT unit constituted with first, second, and third stages respectively including a butterfly for performing a butterfly operation and a complex multiplier for multiplying data outputted from the butterfly by twiddle factors and thus outputting the multiplied value and for performing an FFT/IFFT;
- and
- a control signal input unit for controlling an operation of the butterfly and the complex multiplier of the FFT/IFFT unit and thus outputting a control signal for performing the FFT or the IFFT to the FFT/IFFT unit.
Dependencies are inferred from the claim text.