Apparatus and method for sending and receiving broadcast signals
Disclosed herein is a broadcast signal receiver. A broadcast signal receiver according to an embodiment of the present invention includes a synchronization/demodulation module configured to perform signal detection and OFDM demodulation on a received broadcast signal, a frame parsing and deinterleaving module configured to parse and deinterleave the signal frame of the broadcast signal, a demapping and decoding module configured to convert the data of at least one Physical Layer Pipe (PLP) of the broadcast signal into a bit domain and to perform FEC decoding on the data, and an output processing module configured to receive the data of the at least one PLP and to output a data stream.
1. A broadcast signal receiver, comprising:
an Orthogonal Frequency Division Multiplexing (OFDM) demodulator configured to OFDM demodulate a received broadcast signal;
a pilot detector configured to detect pilots included in the broadcast signal;
a frame parser configured to parse a signal frame of the broadcast signal, the signal frame comprising a bootstrap, a preamble, and a data part;
a demapper and decoder configured to convert Physical Layer Pipe (PLP) data of the signal frame into a bit domain and to perform Forward Error Correction (FEC) decoding on the converted PLP data; and
an output processer configured to output a data stream,
wherein the bootstrap comprises preamble structure information about the preamble, the preamble comprises preamble symbols, and the preamble symbols carry layer 1 (L 1 ) signaling data for the signal frame, and
wherein a first preamble symbol of the preamble has a minimum number of carriers (NoC), and the first preamble symbol comprises NoC-related information indicating an NoC for remaining preamble symbols.
2. The broadcast signal receiver of claim 1 , wherein the preamble structure information indicates a modulation/coding mode, a Fast Fourier Transform (FFT) size, a Guard Interval (GI) length, and a pilot pattern of the preamble.
3. The broadcast signal receiver of claim 1 , wherein:
the first preamble symbol of the preamble comprises preamble_symbol_number information indicating a number of the preamble symbols, and
the preamble_symbol_number information indicates a number of at least one additional preamble symbol.
4. The broadcast signal receiver of claim 1 , wherein:
the preamble symbols comprise preamble pilots, and
for the preamble pilots, a number of symbols forming one pilot sequence in a time direction (Dy) is 1, and a separation of pilots in a frequency direction (Dx) is indicated by a pilot pattern of the preamble structure information.
5. The broadcast signal receiver of claim 2 , wherein:
the L 1 signaling data comprises L 1 -basic data and L 1 detail data, and
the modulation/coding mode indicates modulation/coding mode of the L 1 -basic data.
6. A method of receiving a broadcast signal, comprising:
Orthogonal Frequency Division Multiplexing (OFDM)-demodulating a received broadcast signal;
detecting pilots included in the broadcast signal;
parsing a signal frame of the broadcast signal, the signal frame comprising a bootstrap, a preamble, and a data part;
converting Physical Layer Pipe (PLP) data of the signal frame into a bit domain and performing Forward Error Correction (FEC) decoding on the converted PLP data; and
a data stream,
wherein the bootstrap comprises preamble structure information about the preamble, the preamble comprises preamble symbols, and the preamble symbols carry layer 1 (L 1 ) signaling data for the signal frame, and
wherein a first preamble symbol of the preamble has a minimum number of carriers (NoC), and the first preamble symbol comprises NoC-related information indicating an NoC for remaining preamble symbols.
7. The method of claim 6 , wherein the preamble structure information indicates a modulation/coding mode, a Fast Fourier Transform (FFT) size, a Guard Interval (GI) length, and a pilot pattern of the preamble.
8. The method of claim 6 , wherein:
the first preamble symbol of the preamble comprises preamble_symbol_number information indicating a number of the preamble symbols, and
the preamble_symbol_number information indicates a number of at least one additional preamble symbol.
9. The method of claim 6 , wherein:
the preamble symbols comprise preamble pilots, and
for the preamble pilots, a number of symbols forming one pilot sequence in a time direction (Dy) is 1, and a separation of pilots in a frequency direction (Dx) is indicated by a pilot pattern of the preamble structure information.
10. The method of claim 7 , wherein:
the L 1 signaling data comprises L 1 -basic data and L 1 detail data, and
the modulation/coding mode indicates modulation/coding mode of the L 1 -basic data.