Data transmissions in a mobile communication system...

Details Data transmissions in a mobile communication system... Data transmissions in a mobile communication system...

2011-04-05

2011-04-05

Tran, Khanh C (Department: 2611)

Pulse or digital communications

Transmitters

Quadrature amplitude modulation

C375S320000

Reexamination Certificate

active

07920645

ABSTRACT:
The invention relates to methods for transmitting and receiving a data bit stream in a communication system using 16-QAM constellations. Further, an apparatus for performing the methods is provided. To improve the bit-error rate performance of the communication using the 16-QAM constellations the invention suggests the use 16-QAM constellations with specially selected mapping rules together with a special constellation rearrangement for creating different versions of the 16-QAM constellations. Further, the data stream is transmitted according to a diversity scheme employing different versions of the 16-QAM constellations obtained adhering the mapping rules and rearrangement rules defined by the invention.

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International Search Report dated Dec. 2, 2005.

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