PER STREAM RATE CONTROL (PSRC) FOR IMPROVING SYSEM EFFICIENCY IN OFDM-MIMO COMMUNICATION SYSTEMS
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United States of America Patent
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app pub date -
Mar 2, 2009
filing date -
Aug 11, 2004
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Abandoned
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Abstract
A method and apparatus for separating a user-data stream into a plurality of sub-streams. The apparatus determines channel conditions for each of a plurality of sub-carriers. Next, a plurality of sub-carriers are modulated and encoded with the sub-stream data according to the selected modulation schemes and coding rates. The modulated sub-carriers are each allocated to one or more transmit antennas for transmission. The adaptive modulation and coding function, the sub-carrier allocation function, and the power control function are jointly controlled to optimize throughput, signal quality, and system efficiency.
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