Hierarchical Modulation
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United States of America Patent
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Issued Date -
Jun 10, 2010
app pub date -
Dec 9, 2008
filing date -
Dec 9, 2008
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method for modulating first and second bit streams in a communications network that supports at least one of a binary phase-shift keying (BPSK), a quadrature phase-shift keying (QPSK) or a quadrature amplitude modulation (QAM) constellation uses hierarchical modulation. A hierarchical modulation parameter that varies within the network is set. The first bit stream is modulated based on a first constellation of the hierarchical modulation and the hierarchical modulation parameter. The second bit stream is modulated based on a second constellation in the first constellation.
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