Pulse or digital communications – Systems using alternating or pulsating current – Plural channels for transmission of a single pulse train
Reexamination Certificate
2006-07-04
2006-07-04
Tse, Young T. (Department: 2637)
Pulse or digital communications
Systems using alternating or pulsating current
Plural channels for transmission of a single pulse train
C370S210000
Reexamination Certificate
active
07072411
ABSTRACT:
Improved systems and methods for implementing Orthogonal Frequency Division Multiplexing (OFDM) systems and for computing Fast Fourier Transforms (FET) having strictly real outputs are provided. Systems and methods are provided for efficiently implementing an Inverse Fast Fourier Transform (IFFT) with complex inputs and real outputs. Filtering and upconversion are performed in the frequency domain to simplify digital time domain processing and generally reduce complexity.
REFERENCES:
patent: 5732068 (1998-03-01), Takahashi et al.
patent: 5774450 (1998-06-01), Harada et al.
patent: 6594320 (2003-07-01), Sayeed
patent: 6657950 (2003-12-01), Jones et al.
patent: 6676307 (2004-01-01), Yang et al.
patent: 2002/0021715 (2002-02-01), Matheus et al.
patent: 2002/0080887 (2002-06-01), Jeong et al.
Bracewell,The Fourier Transform and its Applications,(2ndEd. Revised 1986) at pp. 362-370.
Wu et al., “FIR Filter Design via Semidefinite Programming and Spectral Factorization”, Stanford University.
Wu et al., “FIR Filter Design via Spectral Factorization and Convex Optimization”, 1997,Applied Computational Control, Signal and Communications,Chap. 1.
Cisco Technology Inc.
Inventek
Lang Dan
Rosenfeld Dov
Tse Young T.
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