Broadcast signal frame generation apparatus and broadcast signal frame generation method using layered division multiplexing

A broadcast signal reception apparatus, comprising:

• a time deinterleaver configured to perform time deinterleaving on a received signal corresponding to a broadcast signal frame, the broadcast signal frame including a preamble for signaling size information of Physical Layer Pipes (PLPs);
• a core layer BICM decoder configured to restore core layer data corresponding to the broadcast signal frame;
• an enhanced layer symbol extractor configured to extract enhanced layer symbols by performing cancellation corresponding to the core layer data;
• and
• an enhanced layer BICM decoder configured to restore enhanced layer data corresponding to the enhanced layer symbols,
• wherein the preamble includes PLP identification information for identifying at least one of the PLPs,
• wherein the size information is generated based on the number of data cells allocated to the PLPs,
• wherein the size information is included for every PLP inside of Number of PLP (NUM_PLP) loop,
• wherein the broadcast signal frame corresponds to a multiplexed signal, the multiplexed signal corresponding to a combination of a core layer signal and a power-reduced enhanced layer signal, and
• wherein the power-reduced enhanced layer signal is generated corresponding to a scaling factor from an enhanced layer signal and the power of the multiplexed signal is reduced corresponding to a normalizing factor in a transmitter.