Modulation apparatus using mixed-radix fast fourier transform

Details Modulation apparatus using mixed-radix fast fourier transform Modulation apparatus using mixed-radix fast fourier transform

2007-01-16

2007-01-16

Vo, Don N. (Department: 2611)

Pulse or digital communications

Systems using alternating or pulsating current

Plural channels for transmission of a single pulse train

C708S408000, C708S409000

Reexamination Certificate

active

10608511

ABSTRACT:
An FFT (Fast Fourier Transform) processor is disclosed which is a core block of an OFDM (Orthogonal Frequency Division Multiplexing) or DMT (Discrete Multi-tone) MODEM. The FFT processor simultaneously performs sequential input and output by applying an in-place algorithm for a mixed-radix multi-bank memory, thereby realizing continuous processing with only a 2N-word memory having 4 banks. The FFT processor minimizes its complexity while satisfying a high-speed calculation requirement.

REFERENCES:
patent: 2003/0076904 (2003-04-01), Magee
patent: 2003/0169823 (2003-09-01), Reina
patent: 2004/0042387 (2004-03-01), Geile
patent: 2004/0199557 (2004-10-01), Reshef
patent: 2005/0102342 (2005-05-01), Greene

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