Mapping method of code word with QAM modulation

Details Mapping method of code word with QAM modulation Mapping method of code word with QAM modulation

2007-10-02

2007-10-02

Payne, David C. (Department: 2611)

Pulse or digital communications

Receivers

C375S340000, C375S341000, C375S295000, C375S224000, C375S227000, C375S262000, C714S786000, C714S787000, C714S788000, C714S765000

Reexamination Certificate

active

10206034

ABSTRACT:
In the code word mapping operation of a radio communication system, mapping patterns are provided for different S/N ratios, the code word bits produced from a coder are not equally assigned to multi-level modulation bits, but weighted according to the resistance of multi-level modulation bits to error before being assigned, and the mapping patterns are switched in accordance with S/N. Since the code word mapping method is updated so that the error rate can be always minimized according to the situations of a propagation path and S/N ratio, communication can be made with high communication quality.

REFERENCES:
patent: 3988677 (1976-10-01), Fletcher et al.
patent: 5023889 (1991-06-01), Divsalar et al.
patent: 5103459 (1992-04-01), Gilhousen et al.
patent: 5164963 (1992-11-01), Lawrence et al.
patent: 5691995 (1997-11-01), Ikeda et al.
patent: 5812601 (1998-09-01), Schramm
patent: 6088387 (2000-07-01), Gelblum et al.
patent: 6546509 (2003-04-01), Starr
patent: 6553145 (2003-04-01), Kang et al.
patent: 1 043 858 (2000-10-01), None
patent: 04-313983 (1992-11-01), None
patent: 07-283740 (1995-10-01), None
patent: 09-023212 (1997-01-01), None
patent: 2000-165865 (2000-06-01), None
patent: 2000-201132 (2000-07-01), None
John Proakis, Digital Communications (4th edition); McGraw-Hill Book Company, 2001 (Fig. 8.1-19, p. 468).
Jerry D. Gibson, The Communication Handbook; CRC Press LLC, 1997 (Fig. 19.3, p. 247).
Michel C. Jeruchim et al., Simulation of Communications Systems: modeling, methodology, and techniques; Kluwer Academic / Plenum Publishers, 2000 (Fig. 12.17, p. 795).
Lei, S.W.; Lau, V.K.N.; “Adaptive interleaving for OFDM in TDD systems”, IEE Proc. Commun. vol. 148, No. 2, Apr. 2001, pp. 77-80.

Affiliated with

Also associated with

Rating

Mapping method of code word with QAM modulation does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Mapping method of code word with QAM modulation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mapping method of code word with QAM modulation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3900828