Multi-level modulation apparatus, multi-level demodulation...

Details Multi-level modulation apparatus, multi-level demodulation... Multi-level modulation apparatus, multi-level demodulation...

2007-06-12

2007-06-12

Ha, Dac (Department: 2611)

Pulse or digital communications

Multilevel

C375S261000, C375S264000, C375S298000, C375S324000, C375S340000

Reexamination Certificate

active

10404135

ABSTRACT:
In a QAM modulation system, (3p+1) or (3p+2) input signal strings, where p is an integer not less than 3 or 2, are converted into three (p+1) string signals which are then allocated to three phase planes. The converted three (p+1) string signals are time-division multiplexed and multi-level modulated to realize QAM modulation in which the n-ary number may be set to approximately 2(p+1/3)or 2(p+2/3).In a QAM modulation system, (4p+3) input signal strings, where p is an integer not less than 3, are converted into three (p+1) string signals, which are then allocated to three phase planes, time-division multiplexed and multi-level modulated to realize QAM modulation in which the n-ary number may be set to approximately 2(p+3/4).

REFERENCES:
patent: 5107504 (1992-04-01), Nakamura et al.
patent: 6212654 (2001-04-01), Lou et al.
patent: 6980539 (2005-12-01), Hanada et al.
patent: 2002/0031190 (2002-03-01), Ophir et al.
patent: 2003/0039315 (2003-02-01), Noda
patent: 102 37 521 (2003-03-01), None
patent: 4-196945 (1992-07-01), None
A. Chouly et al., “A Class of Block-Coded Modulation Schemes Based on One-Step Partitioning of the Signal Alphabet,” International Conference on Communications, vol. 1, Jun. 1989, XP000075508.
Patent Abstracts of Japan, vol. 16, No. 526, Oct. 28, 1992 & JP 04-196945A Jul. 16, 1992, abstract only.

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