Fremgangsmåte og apparat for tilpasning av bæreeffektkrav i samsvar med tilgjengelighet i lagdelte modulasjonssystemer.

摘要

A method and apparatus transmitting a layered modulation signal having a first signal layer having first signal symbols and a second signal layer having second signal symbols is disclosed. The method comprises the steps of determining a first signal layer modulation carrier power CSUBL /SUBat least in part according to a first signal layer clear sky margin MSUBL /SUBand a first signal layer availability, determining an second signal layer modulation carrier power CSUBU /SUBat least in part according to an second signal layer clear sky margin MSUBU /SUBand an second signal layer availability, modulating the first signal symbols according to a first carrier at the determined first signal layer modulation carrier power; modulating the second signal symbols according to a second carrier at the determined second signal layer modulation carrier power, and transmitting the two layers independently.