Reliable symbols as a means of improving the performance of information transmission systems
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United States of America Patent
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Aug 1, 2006
Grant Date -
Mar 28, 2002
app pub date -
Jul 9, 2001
filing date -
Nov 4, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
All practical communication channels impose some type of corruption on received data through inter-symbol interference (ISI). ISI corruption is particularly acute in high-order constellation transmission. Although ISI effects of high-order constellation transmission are very large on average, some symbols may be received that suffer relatively low levels of ISI. These symbols are 'reliable symbols' and can be used to provide blind estimation of the ISI coefficients. Once the ISI effects of a channel are known, all captured signals may be corrected.
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