Communication apparatus and decoding method
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United States of America Patent
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Mar 6, 2012
Grant Date -
May 21, 2009
app pub date -
Jul 12, 2006
filing date -
Jul 13, 2005
priority date (Note) -
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Abstract
A communication apparatus includes a storage unit, a row processing unit, and a column processing unit. The row processing unit repeatedly performs row processing to calculate a column-processing LLR for each column and each row in a check matrix. The column processing unit calculates a row-processing LLR for each column and each row of the check matrix, and repeatedly performs column processing to store in the storage unit the minimum value k of absolute values of the row-processing LLR. The row processing unit and the column processing unit alternately performs their processing. The row processing unit performs calculation using an approximate minimum value while the column processing unit cyclically updates the minimum k value of each row.
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