APPARATUS FOR TRANSMITTING AND RECEIVING A SIGNAL AND METHOD OF TRANSMITTING AND RECEIVING A SIGNAL

摘要

A method of transmitting a broadcasting signal is provided. The method includes encoding data; encoding signaling data by an LDPC (Low Density Parity Check) scheme; building a signal frame based on at least one preamble data symbol having the encoded signaling data and a data slice having the encoded data; inserting at least one pilot into the signal frame with a specific pattern and modulating the signal frame by an OFDM (Orthogonal Frequency Division Multiplexing) method; and transmitting the modulated signal frame. A signaling block having the signaling data is repeated in the at least one preamble data symbol in a frequency domain by a bandwidth. The bandwidth of the signaling block corresponds to a number of active subcarriers assigned to a single channel.

主权项

1. A method of transmitting broadcast signals, the method comprising:
encoding signaling data according to an LDPC (Low Density Parity Check) scheme; encoding data according to at least one code rate; mapping the encoded data onto constellations according to at least QAM (Quadrature amplitude modulation) or Non-uniform QAM; building at least one signal frame based on at least one preamble data symbol including the encoded signaling data and based on data symbols including the mapped data; inserting at least one pilot with a specific pattern into each of the at least one signal frame; modulating the at least one signal frame according to an OFDM (Orthogonal Frequency Division Multiplexing) method; and transmitting the broadcast signals including the modulated at least one signal frame.