Adaptive modulation transmission system, transmission device, reception device, and method thereof
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United States of America Patent
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Issued Date -
Sep 21, 2006
app pub date -
Mar 4, 2004
filing date -
Mar 5, 2003
priority date (Note) -
Abandoned
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Abstract
An adaptive modulation transmission system is disclosed that is capable of assigning a combination of a modulation parameter and a code multiplicity according to a user requirement and a propagation path condition between a transmission device and a reception device. The transmission device includes a signal modulation unit to modulate data according to the modulation parameter, a code multiplexing unit to perform code multiplexing according to the code multiplicity, a code multiplexing controller to select the code multiplicity according to the required amount of transmission data, and an adaptive modulation controller. The adaptive modulation controller sets a threshold of the propagation path quality to define a region to which a combination of the modulation parameter and the code multiplicity is applicable, selects the combination of the modulation parameter and the code multiplicity based on a comparison result of the threshold and measured propagation path quality, and outputs the selected modulation parameter to the signal modulation unit.
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