US Patent 9553613 Transmitter and puncturing method thereof

Provided are a transmitter for processing an L1 signaling including an L1-pre signaling and an L1-post signaling, a receiver of the L1 signaling, and methods of controlling the transmitter and the receiver. The transmitter includes: an encoder configured to perform Bose, Chaudhuri, Hocquenghem (BCH) encoding and Low Density Parity Check (LDPC) encoding with respect to the L1-post signaling, and a puncturing unit configured to puncture at least a part of LDPC parity bits constituting an LDPC codeword generated by the LDPC encoding of the L1-post signaling, wherein the number of bits to be punctured is calculated based on the number of bits available for transmission of the LDPC codeword and a modulation order of the L1-post signaling.