Pulse or digital communications – Systems using alternating or pulsating current – Plural channels for transmission of a single pulse train
Reexamination Certificate
2001-07-19
2008-03-25
Vo, Don N (Department: 2611)
Pulse or digital communications
Systems using alternating or pulsating current
Plural channels for transmission of a single pulse train
Reexamination Certificate
active
07349486
ABSTRACT:
A system for, and method of, recognizing zero-amplitude symbols in a quadrature amplitude modulated (QAM) signal and a digital receiver incorporating the system or the method. In one embodiment, the system includes: (1) an amplitude detector that extracts a candidate symbol from the signal and locates the candidate symbol relative to a constellation of symbols and (2) a zero-amplitude symbol interpreter, associated with the amplitude detector, that recognizes the candidate symbol as being a zero-amplitude symbol when the candidate symbol is closer to an origin of the constellation than to symbols proximate thereto.
REFERENCES:
patent: 4562425 (1985-12-01), Turner et al.
patent: 4644537 (1987-02-01), Gitlin et al.
patent: 5381450 (1995-01-01), Lane
patent: 5418815 (1995-05-01), Ishikawa et al.
patent: 5471508 (1995-11-01), Koslov
patent: 5521949 (1996-05-01), Huang et al.
patent: 5694389 (1997-12-01), Seki et al.
patent: 5799037 (1998-08-01), Strolle et al.
patent: 5832041 (1998-11-01), Hulyalkar
patent: 6133785 (2000-10-01), Bourdeau
patent: 6313885 (2001-11-01), Patel et al.
patent: 6438187 (2002-08-01), Abbey
patent: 6476734 (2002-11-01), Jeong et al.
patent: 6553087 (2003-04-01), Alelyunas et al.
patent: 6687306 (2004-02-01), Wang et al.
patent: 6853631 (2005-02-01), Nakamura et al.
patent: 2002/0007257 (2002-01-01), Riess et al.
patent: 2002/0037062 (2002-03-01), Riess et al.
Messerschmitt & Lee; Digital Communications; Copyright 1988 by Kluwer Academic Publishers; pp. 152-153 (Sec. 6.1.3, Example 6-8) & p. 186-189 (Sec. 6.5, Fig. 6-28).
“Digital Communications” by John G. Proakis; Third Edition; McGraw-Hill, Inc.; 1995; pp. 178-180.
“Wireless Communications—Principles and Practice” by Theodore S. Rappaport; Prentice Hall PTR; 1996; pp. 270-272.
Huang Gang
Liang Min
Wang Zhenyu
Agere Systems Guardian Corporation
Vo Don N
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