Individual interleaving of data streams for MIMO transmission
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United States of America Patent
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May 24, 2011
Grant Date -
Mar 19, 2009
app pub date -
Jun 23, 2006
filing date -
Oct 5, 2005
priority date (Note) -
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Abstract
The present invention, generally speaking, provides interleavers and methods of interleaving that satisfy the need for backward compatibility while effectively addressing competing design objectives. In accordance with one aspect of the invention, data is transmitted using a number of transmit antennas greater than an expected number of receive antennas. At least one pair of transmit antennas is formed (ant1, ant_N), and multiple second data streams (311, 312) are formed from a first data stream, successive bits in said first data stream being assigned to different ones of said second data streams. Block interleaving (313, 314) of multiple respective ones of said second data streams is individually performed. During successive transmission intervals, the pair of transmit antennas is used to transmit a pair of data symbols taken from different ones of said second data streams, followed by an equivalent transformed pair of data symbols.
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