Pulse or digital communications – Transmitters – Angle modulation
Reexamination Certificate
2005-03-01
2010-11-09
Liu, Shuwang (Department: 2611)
Pulse or digital communications
Transmitters
Angle modulation
C375S355000, C375S298000, C375S135000, C375S136000, C370S305000, C370S350000
Reexamination Certificate
active
07830983
ABSTRACT:
The present invention provides a method to minimize degradation in a D-MPSK hierarchical modulation system by adding additional data throughput (i.e., secondary information) as an offset to the primary signal transmitted by a SDARS terrestrial repeater. The present invention provides techniques for adding the additional throughput as Level 2 data by transmitting offset phase and/or amplitude information across adjacent OFDM symbols and/or adjacent frequency subcarriers.
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Dibiaso Eric A.
Hiatt, Jr. Michael L.
Walker Glenn A.
Delphi Technologies Inc.
Liu Shuwang
Timory Kabir A
Twomey Thomas N.
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