Method for transmitting optimally interleaved data in a MIMO telecommunication system
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United States of America Patent
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Apr 29, 2008
Grant Date -
Apr 14, 2005
app pub date -
Aug 26, 2004
filing date -
Aug 29, 2003
priority date (Note) -
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Abstract
The present invention relates to a method for transmitting data including a bit interleaving step for permutating encoded data bits Tb before their transmission in the form of modulation symbols over Nt transmitting antennas. According to the invention, the bit interleaving step involves bit demultiplexing DMXS for extracting bit sequences Bsj (for j=0 to Nt) from the encoded data bits Tb, sequence interleaving SRIS for permutating the bits of each sequence Bsj (for j=0 to Nt), sequence storing and segmenting SQSS for dividing each interleaved sequence Isqj (for j=0 to Nt) into successive segments Psgj, and segment shifting SGS for applying circular shifts to simultaneous different segments Psgj (for j=1 to Nt). The invention enables to ensure that consecutive encoded bits see a maximum number of different communication channel states, and thus favours data diversity.
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