Optimization technique for layered modulation
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United States of America Patent
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Dec 23, 2008
Grant Date -
May 24, 2007
app pub date -
Jan 18, 2007
filing date -
Apr 27, 2001
priority date (Note) -
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Abstract
A method and apparatus for optimizing a system for transmitting a layered modulated signal is disclosed. The method comprises the steps of defining the system in terms of a set of system parameters, including an optimal power separation S between a power of a first modulation layer and a power of a second modulation layer and a required system carrier-to-noise ratio (CNR.sub.S), determining an optimal power separation S to minimize the error rate of a lower layer modulated signal BER.sub.L, and selecting the remaining system parameters in the set of system parameters using the determined optimal power separation S.
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