Method and apparatus for puncturing code symbols in a communications system
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United States of America Patent
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Feb 26, 2008
Grant Date -
Jul 8, 2004
app pub date -
Dec 18, 2003
filing date -
Jun 2, 2000
priority date (Note) -
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Abstract
Techniques for puncturing symbols in a communications system. S symbols are received for a frame having a capacity of N symbols, with S being greater than N. P symbols need to be punctured so that remaining symbols fit into the frame. A number of puncture distances, D1 through DN, are computed based on S and P. A particular number of symbol punctures is determined for each computed puncture distance. P1 through PN symbol punctures are then performed at the distances of D1 through DN, respectively. For a more even distribution of the symbol punctures, each of the distances D1 through DN can be selected to be greater than or equal to a minimum puncture distance Dmin defined as Dmin=.left brkt-bot.S/P.right brkt-bot., where .left brkt-bot. .right brkt-bot. denotes a floor operator. The symbol punctures at each computed distance can be performed together or distributed with symbol punctures at other distances.
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