Modulation and demodulation based on hierarchical modulation

Details Modulation and demodulation based on hierarchical modulation Modulation and demodulation based on hierarchical modulation

2003-09-15

2009-10-06

Ghayour, Mohammad H (Department: 2611)

Pulse or digital communications

Transmitters

C375S298000, C375S308000, C375S377000

Reexamination Certificate

active

07599446

ABSTRACT:
A modulation device comprises a modulation unit (2) that modulates data in a hierarchical manner using multiple types of modulation techniques, and a transmission unit (3) that transmits the hierarchically modulated data. A demodulation device comprises a receiving unit (4) that receives the hierarchical modulation data having been subjected to hierarchical modulation using multiple types of modulation techniques, and a demodulation unit (6) that demodulates the hierarchical modulation data using a demodulation technique corresponding to a specific hierarchy of the hierarchical modulation data.

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