Radio transmission apparatus and radio transmission method
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United States of America Patent
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Jun 26, 2012
Grant Date -
Oct 15, 2009
app pub date -
Jun 23, 2009
filing date -
Sep 13, 2002
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Data streams stored in buffers are modulated by modulation sections. Multipliers multiply the signals output from the modulation sections by weights output from a weight control section. The signals output from the multipliers are added up by addition sections, subjected to radio transmission processing by transmission radio sections and sent through antennas. A buffer control section controls the buffers based on a retransmission count output from a retransmission count detection section. The weight control section outputs weights different from weights at the time of previous transmission to the multipliers every time data is retransmitted. This allows a diversity gain at the time of data retransmission to be increased even if a time variation of the propagation path environment for radio signals is slow.
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