On-off keying-7-phase shift keying modulation system and...

Details On-off keying-7-phase shift keying modulation system and... On-off keying-7-phase shift keying modulation system and...

2008-03-14

2009-08-25

Mis, David (Department: 2817)

Modulators

Phase shift keying modulator or quadrature amplitude modulator

C329S304000

Reexamination Certificate

active

07579921

ABSTRACT:
A modulation system includes a modulator configured to employ a modulation mechanism on data. The mechanism includes a signal constellation configured to map sub-carriers which include a signal to be modulated. The signal constellation has a plurality of points asymmetrically disposed on a circle about an origin and a point at the origin wherein a number of sub-carriers becomes variable over different symbol intervals. Corresponding demodulators and corresponding methods are also disclosed.

REFERENCES:
patent: 5535244 (1996-07-01), Nakatsu et al.
patent: 19843243373 (1984-07-01), None
patent: 2004208254 (2004-07-01), None
patent: 20030072724 (2003-09-01), None
patent: 20060071084 (2006-06-01), None

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