Providing slope values for a demapper
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United States of America Patent
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Feb 4, 2014
Grant Date -
Jul 25, 2013
app pub date -
Jan 25, 2012
filing date -
Jan 25, 2012
priority date (Note) -
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Abstract
In one embodiment, a method can provide for dynamic updating of slope values used in determining a soft decision for a demodulated signal obtained in a receiver from a broadcast signal received by the receiver. The method includes generating a channel estimate for a channel traversed by the signal, computing channel state information from the channel estimate, computing statistical information from the channel state information, determining a slope value based at least in part on the statistical information, calculating a log-likelihood ratio (LLR) value for the signal, and applying the slope value to the LLR value to obtain a weighted LLR value.
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