Signal component demultiplexing apparatus, filter apparatus,...

Pulse or digital communications – Systems using alternating or pulsating current – Plural channels for transmission of a single pulse train

Reexamination Certificate

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C370S341000, C370S343000

Reexamination Certificate

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07133458

ABSTRACT:
A communication apparatus, a signal component demultiplexing apparatus, and a filter apparatus for reducing a load of FFT processing in a receiver in multi-carrier communication, wherein the receiving apparatus provides a signal component demultiplexing apparatus before an FFT circuit and extracts only the required symbol series and the signal component demultiplexing apparatus has hierarchically arranged branching circuits each including a symbol delay circuit, a phase offset adjustment circuit, an adder circuit, and a subtractor circuit, one symbol string being output from the adder circuit and another symbol string being output from the subtractor circuit.

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patent: 5548582 (1996-08-01), Brajal et al.
patent: 6169768 (2001-01-01), Okada et al.
patent: 6188717 (2001-02-01), Kaiser et al.
patent: 6381234 (2002-04-01), Sakoda et al.
patent: 6563881 (2003-05-01), Sakoda et al.
patent: 6628673 (2003-09-01), McFarland et al.

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