Pulse or digital communications – Transmitters – Quadrature amplitude modulation
Reexamination Certificate
2007-10-10
2011-10-18
Sinkantarakorn, Pao (Department: 2464)
Pulse or digital communications
Transmitters
Quadrature amplitude modulation
C375S299000
Reexamination Certificate
active
08040974
ABSTRACT:
A shift space-time encoding scheme applies STBC over hierarchical modulation. A low-priority bit stream is modulated to complex symbols using STBC encoding and a high-priority bit stream is modulated to complex symbols without STBC encoding. Complex symbols from the low-priority bit stream together with the complex symbols from the high-priority bit stream are added to form a hierarchical 64-QAM constellation.
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Finnegan Henderson Farabow Garrett & Dunner LLP
Industrial Technology Research Institute
Nguyen Phuongchau B
Sinkantarakorn Pao
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