Multiple-input multiple-output (MIMO) detector incorporating efficient signal point search and soft information refinement
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United States of America Patent
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May 18, 2010
Grant Date -
Nov 13, 2008
app pub date -
May 10, 2007
filing date -
May 10, 2007
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Abstract
A novel and useful apparatus for and method of multiple input multiple output (MIMO) detection for use in MIMO based communication systems. The mechanism of the invention performs a simplified tree search utilizing a single stage expansion of the most likely first symbol candidates, in the case of a 2×2 MIMO system. The invention also provides a refinement mechanism operative to significantly improve the soft information (i.e. log likelihood ratio) of the list of candidates. To improve the soft information, the mechanism applies one or more refinement rounds to generate additional candidates for both first and second detected symbols.
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