Patent ID: 9160602
Filing Date: 2015-10-13
Classification: H04L

Abstract:
1. A method of hierarchically modulating a transmission frame including an overlay layer modulated onto a base layer, the base layer providing basic service and the overlay layer providing additional services, the method comprising: synchronously aligning an overlay layer frame to a base layer frame; generating a master frame of the base layer comprising the aligned frame by inserting additional data bits at the beginning of the aligned frame and at a selected interval throughout the aligned frame, wherein the aligned frame comprises payload bits for the base layer service and the overlay layer service, and the additional data bits are synchronization bits related to a synchronization bit or pattern of the base layer; modulating the synchronization bits of the master frame using a first modulation technique; and hierarchically modulating the payload bits of the master frame using a second modulation technique based on the first modulation technique.