Signal space expansion for a 16 QAM scheme

Details Signal space expansion for a 16 QAM scheme Signal space expansion for a 16 QAM scheme

2011-04-05

2011-04-05

Wang, Ted M (Department: 2611)

Pulse or digital communications

Systems using alternating or pulsating current

Plural channels for transmission of a single pulse train

C375S295000, C375S298000, C455S108000

Reexamination Certificate

active

07920636

ABSTRACT:
The invention relates to methods for transmitting and receiving a data bit stream in a communication system using a 16-QAM constellation. Further, an apparatus for performing the methods is provided. To provide a modulation and coding scheme using a signal space expansion and 16-QAM which improves the bit-error rate in comparison to QPSK modulated signals and still provides the possibility to implement coders and decoders with low complexity the invention suggests the use a 16-QAM constellation with specially selected mapping rules together with repetition coding (signal space expansion) and interleaving of the data stream to be transmitted.

REFERENCES:
patent: 6195396 (2001-02-01), Fang et al.
patent: 6404755 (2002-06-01), Schafer
patent: 6459703 (2002-10-01), Grimwood et al.
patent: 2002/0163975 (2002-11-01), Uesugi et al.
patent: 2002/0199147 (2002-12-01), Kim et al.
patent: 1235404 (2002-08-01), None
U. Hansson, et al. “Channel Symbol Expansion Diversity-Improved Coded Modulation for the Rayleigh Fading Channel,” IEEE International Conference on Communications, Jun. 23-27, 1996, pp. 891-895.

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