Channel code decoding for the CDMA forward link
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United States of America Patent
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Feb 7, 2006
Grant Date -
May 1, 2003
app pub date -
Sep 27, 2002
filing date -
Sep 28, 2001
priority date (Note) -
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status (Latency Note)
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Abstract
Channel coding is used on the forward link of a CDMA cellular telephone network to allow the CDMA mobile channel decoder to perform error correction. On a wireless link, channel code performance is improved by providing the channel decoder with an estimate of the reliability of each received symbol. This reliability information is typically the ratio of desired signal energy to interference plus noise variance at the channel decoder input. This invention improves CDMA mobile channel decoder performance using a new technique for calculating more accurate estimates of the signal to interference plus noise ratio at the input of the mobile channel decoder.
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