Pulse or digital communications – Transmitters – Quadrature amplitude modulation
Reexamination Certificate
2011-01-18
2011-01-18
Payne, David C (Department: 2611)
Pulse or digital communications
Transmitters
Quadrature amplitude modulation
C375S300000, C375S265000, C375S267000, C375S268000, C375S270000, C714S786000, C714S792000, C714S790000, C714S796000
Reexamination Certificate
active
07873120
ABSTRACT:
A method of broadcasting an AM compatible digital audio broadcasting signal includes: producing an analog modulated carrier signal centrally positioned in a radio channel, wherein the analog modulated carrier signal is modulated by an analog signal, producing a plurality of digitally modulated subcarrier signals in the radio channel, wherein the digitally modulated subcarrier signals are modulated using complementary pattern-mapped trellis code modulation (CPTCM) including a code mapped to overlapping partitions including an upper main partition, a lower main partition, an upper backup partition and a lower backup partition, and a non-overlapping tertiary partition, and transmitting the analog modulated carrier signal and the plurality of digitally modulated subcarrier signals. Transmitters that broadcast the signal and receivers that receive the signal, and the reception method are also included.
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Guarino Rahel
ibiquity Digital Corporation
Lenart, Esq. Robert P.
Payne David C
Pietragallo Gordon Alfano Bosick & Raspanti, LLP
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