Patent ID: 11943090
Assignee: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 3:
4. A broadcast signal reception method, comprising:
generating a received signal by performing any one or any combination of any two or more of synchronization, channel estimation and equalization, the received signal corresponding to a multiplexed signal;
performing time deinterleaving on the received signal;
restoring, by a core layer BICM decoder, core layer data of the multiplexed signal;
extracting enhanced layer symbols by performing cancellation corresponding to the core layer data; and
restoring, by an enhanced layer BICM decoder, enhanced layer data corresponding to the enhanced layer symbols,
wherein the core layer data corresponds to a core layer and the enhanced layer data corresponds to an enhanced layer,
wherein the power-reduced enhanced layer signal is generated corresponding to a scaling factor by an injection level controller of a transmitter and the power of the combination of the core layer signal and the power-reduced enhanced layer signal is reduced corresponding to a normalizing factor in the transmitter,
wherein the scaling factor decreases as a power reduction corresponding to the power-reduced enhanced layer signal becomes larger, and the normalizing factor increases as the power reduction becomes larger, and
wherein the injection level controller changes an injection level with one of predetermined step sizes, the step sizes including 0.5 dB.