Multiplex communications – Diagnostic testing – Determination of communication parameters
Reexamination Certificate
2003-12-31
2008-12-30
Backer, Firmin (Department: 2616)
Multiplex communications
Diagnostic testing
Determination of communication parameters
C370S465000, C370S474000, C375S261000, C375S298000
Reexamination Certificate
active
07471640
ABSTRACT:
A scalable QAM system and communication method. High-level QAM signals are broadcast from a transmitter. The transmitter comprises a scalable frame structure in a MAC layer and a bitmap method in a physical layer transmitting modulated signals with data distributed in different bit positions. Each client determines whether to demodulate all the received data on the bit plane or only a portion of the data in certain bit positions according to the transmission quality (SNR) of the received signal, in order to acquire a lower bit error rate and improve the efficiency of the transmission bandwidth.
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Fan Chih Peng
Huang Cheng-Yi
Lin David W.
Backer Firmin
Birch & Stewart Kolasch & Birch, LLP
Industrial Technology Research Institute
Juntima Nittaya
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