Adaptive FIR filter and method
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United States of America Patent
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Mar 9, 2010
Grant Date -
May 5, 2005
app pub date -
Sep 28, 2004
filing date -
Sep 29, 2003
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Abstract
Finite impulse response filters are commonly used in high speed data communications electronics for reducing error rates in multilevel symbol encoding schemes. Schemes such as pulse amplitude modulation and quadrature amplitude modulation may have higher error rates for symbols with low signal to noise ratios. By selectively updating the tap coefficients of the filter based on the symbols received, a more robust, accurate filter can be built.
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