Method and apparatus for modulating digital signal using...

Details Method and apparatus for modulating digital signal using... Method and apparatus for modulating digital signal using...

2011-01-04

2011-01-04

Payne, David C (Department: 2611)

Pulse or digital communications

Transmitters

Quadrature amplitude modulation

C332S103000, C332S145000

Reexamination Certificate

active

07864883

ABSTRACT:
Disclose is a modulation method that transmits n bits per modulation symbol, comprising the steps of: (a) generating a constellation of which 2nconstellation points are arranged to be angular point of equilateral triangle; (b) generating a modulation symbol by mapping the constellation point with digital signal. According to the present invention, average power consumed by constellation points can be reduced by using equilateral triangular constellation.

REFERENCES:
patent: 4860316 (1989-08-01), Takenaka et al.
patent: 5742643 (1998-04-01), Reeves et al.
patent: 6310925 (2001-10-01), Kitta
patent: 2008/0285669 (2008-11-01), Walton et al.
Publication: In-Whan Kim, et al., “A Study on the 256-Qam Method with Signals of Triangular Arrangement,”Korea Information and Communications Society, 1992.

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