Transmit signal preprocessing based on transmit antennae correlations for multiple antennae systems
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United States of America Patent
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Dec 12, 2006
Grant Date -
Mar 6, 2003
app pub date -
Sep 6, 2001
filing date -
Sep 6, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention provides a method and system for preprocessing transmit signals in spatial multiplexing and diversity systems that include multiple transmit antennae. The method includes generating a representative correlation matrix based upon estimates of a correlation between each pair of the plurality of antennae. An equivalent eigenvalue decomposition of the representative correlation matrix is determined. A preprocessing matrix based upon the equivalent eigenvalue decomposition is generated. Finally, a preprocessor preprocesses the transmit signals by multiplying blocks of data of the transmit signals with the preprocessing matrix. The representative correlation matrix can be an exact estimate of the correlation between each pair of the multiple antennae, or the representative correlation matrix can be an approximate estimate of the correlation between each pair of the multiple antennae.
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